Tag Archives: Raspberry Pi 3B+

Build a Raspberry Pi laser scanner

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/build-a-raspberry-pi-laser-scanner/

You really don’t need anything too fancy to build this Raspberry Pi laser scanner, and that’s why we think it’s pretty wonderful.

Rasperry Pi 3D Laser Scanner

Cornell University: ECE 5725 Michael Xiao and Thomas Scavella

Building a Raspberry Pi laser scanner

The ingredients you’ll need to build the laser scanner are:

  • Raspberry Pi
  • Raspberry Pi Camera Module v2
  • Stepper motor and driver
  • Line laser
  • Various LEDs, resistors, and wires
  • Button

To complete the build, access to a 3D printer and laser cutter would come in handy. If you don’t have access to such tools, we trust you to think of an alternative housing for the scanner. You’re a maker, you’re imaginative — it’s what you do.

How does the laser scanner work?

The line laser projects a line an object, highlighting a slice of it. The Raspberry Pi Camera Module captures this slice, recording the shape of the laser line on the object’s surface. Then the stepper motor rotates the object. When the object has completed a full rotation and the camera has taken an image of every slice, the Raspberry Pi processes all the images to create one virtual 3D object.

Instructables user mfx2 has written a wonderful tutorial for the project, which also includes all files needed to build and program your own version.

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Playing The Doors with a door (and a Raspberry Pi)

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/playing-the-doors-with-a-door-and-a-raspberry-pi/

Floyd Steinberg is back with more synthy Raspberry Pi musical magic, this time turning a door into a MIDI controller.

I played The Doors on a door – using a Raspberry PI DIY midi controller and a Yamaha EX5

You see that door? You secretly want that to be a MIDI controller? Here’s how to do it, and how to play a cover version of “Break On Through” by The Doors on a door 😉 Link to source code and the DIY kit below.

If you don’t live in a home with squeaky doors — living room door, I’m looking at you — you probably never think about the musical potential of mundane household objects.

Unless you’re these two, I guess:

When Mama Isn’t Home / When Mom Isn’t Home ORIGINAL (the Oven Kid) Timmy Trumpet – Freaks

We thought this was hilarious. Hope you enjoy! This video has over 60 million views worldwide! Social Media: @jessconte To use this video in a commercial player, advertising or in broadcasts, please email [email protected]

If the sound of a slammed oven door isn’t involved in your ditty of choice, you may instead want to add some electronics to that sweet, sweet harmony maker, just like Floyd.

Trusting in the melodic possibilities of incorporating a Raspberry Pi 3B+ and various sensory components into a humble door, Floyd created The Doors Door, a musical door that plays… well, I’m sure you can guess.

If you want to build your own, you can practice some sophisticated ‘copy and paste’ programming after downloading the code. And for links to all the kit you need, check out the description of the video over on YouTube. While you’re there, be sure to give the video a like, and subscribe to Floyd’s channel.

And now, to get you pumped for the weekend, here’s Jim:

The Doors – Break On Through HQ (1967)

recorded fall 1966 – lyrics: You know the day destroys the night Night divides the day Tried to run Tried to hide Break on through to the other side Break on through to the other side Break on through to the other side, yeah We chased our pleasures here Dug our treasures there But can you still recall The time we cried Break on through to the other side Break on through to the other side Yeah!

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How to set up OctoPrint on your Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/how-to-set-up-octoprint-on-your-raspberry-pi/

If you own a 3D printer, you’ll likely have at least heard of OctoPrint from the ever benevolent 3D printing online community. It has the potential to transform your 3D printing workflow for the better, and it’s very easy to set up. This guide will take you through the setup process step by step, and give you some handy tips along the way.

Octoprint

Before we start finding out how to install OctoPrint, let’s look at why you might want to. OctoPrint is a piece of open-source software that allows us to add WiFi functionality to any 3D printer with a USB port (which is pretty much all of them). More specifically, you’ll be able to drop files from your computer onto your printer, start/stop prints, monitor your printer via a live video feed, control the motors, control the temperature, and more, all from your web browser. Of course, with great power comes great responsibility — 3D printers have parts that are hot enough to cause fires, so make sure you have a safe setup, which may include not letting it run unsupervised.

OctoPrint ingredients

• Raspberry Pi 3 (or newer)
MicroSD card
• Raspberry Pi power adapter
• USB cable (the connector type will depend on your printer)
• Webcam/Raspberry Pi Camera Module (optional)
• 3D-printed camera mount (optional)

Before we get started, it is not recommended that anything less than a Raspberry Pi 3 is used for this project. There have been reports of limited success using OctoPrint on a Raspberry Pi Zero W, but only if you have no intention of using a camera to monitor your prints. If you want to try this with a Pi Zero or an older Raspberry Pi, you may experience unexpected print failures.

Download OctoPi

Firstly, you will need to download the latest version of OctoPi from the OctoPrint website. OctoPi is a Raspbian distribution that comes with OctoPrint, video streaming software, and CuraEngine for slicing models on your Raspberry Pi. When this has finished downloading, unzip the file and put the resulting IMG file somewhere handy.

Next, we need to flash this image onto our microSD card. We recommend using Etcher to do this, due to its minimal UI and ease of use; plus it’s also available to use on both Windows and Mac. Get it here: balena.io/etcher. When Etcher is installed and running, you’ll see the UI displayed. Simply click the Select Image button and find the IMG file you unzipped earlier. Next, put your microSD card into your computer and select it in the middle column of the Etcher interface.

Finally, click on Flash!, and while the image is being burned onto the card, get your WiFi router details, as you’ll need them for the next step.

Now that you have your operating system, you’ll want to add your WiFi details so that the Raspberry Pi can automatically connect to your network after it’s booted. To do this, remove the microSD card from your computer (Etcher will have ‘ejected’ the card after it has finished burning the image onto it) and then plug it back in again. Navigate to the microSD card on your computer — it should now be called boot — and open the file called octopi-wpa-supplicant.txt. Editing this file using WordPad or TextEdit can cause formatting issues; we recommend using Notepad++ to update this file, but there are instructions within the file itself to mitigate formatting issues if you do choose to use another text editor. Find the section that begins ## WPA/WPA2 secured and remove the hash signs from the four lines below this one to uncomment them. Finally, replace the SSID value and the PSK value with the name and password for your WiFi network, respectively (keeping the quotation marks). See the example below for how this should look.

Further down in the file, there is a section for what country you are in. If you are using OctoPrint in the UK, leave this as is (by default, the UK is selected). However, if you wish to change this, simply comment the UK line again by adding a # before it, and uncomment whichever country you are setting up OctoPrint in. The example below shows how the file will look if you are setting this up for use in the US:

# Uncomment the country your Pi is in to activate Wifi in RaspberryPi 3 B+ and above
# For full list see: https://en.wikipedia.org/ wiki/ISO_3166-1_alpha-2
#country=GB # United Kingdom
#country=CA # Canada
#country=DE # Germany
#country=FR # France
country=US # United States

When the changes have been made, save the file and then eject/unmount and remove the microSD card from your computer and put it into your Raspberry Pi. Plug the power supply in, and go and make a cup of tea while it boots up for the first time (this may take around ten minutes). Make sure the Raspberry Pi is running as expected (i.e. check that the green status LED is flashing intermittently). If you’re using macOS, visit octopi.local in your browser of choice. If you’re using Windows, you can find OctoPrint by clicking on the Network tab in the sidebar. It should be called OctoPrint instance on octopi – double-clicking on this will open the OctoPrint dashboard in your browser.

If you see the screen shown above, then congratulations! You have set up OctoPrint.

Not seeing that OctoPrint splash screen? Fear not, you are not the first. While a full list of issues is beyond the scope of this article, common issues include: double-checking your WiFi details are entered correctly in the octopi-wpa-supplicant.txt file, ensuring your Raspberry Pi is working correctly (plug the Raspberry Pi into a monitor and watch what happens during boot), or your Raspberry Pi may be out of range of your WiFi router. There’s a detailed list of troubleshooting suggestions on the OctoPrint website.

Printing with OctoPrint

We now have the opportunity to set up OctoPrint for our printer using the handy wizard. Most of this is very straightforward — setting up a password, signing up to send anonymous usage stats, etc. — but there are a few sections which require a little more thought.

We recommend enabling the connectivity check and the plug-ins blacklist to help keep things nice and stable. If you plan on using OctoPrint as your slicer as well as a monitoring tool, then you can use this step to import a Cura profile. However, we recommend skipping this step as it’s much quicker (and you can use a slicer of your choice) to slice the model on your computer, and then send the finished G-code over.

Finally, we need to put in our printer details. Above, we’ve included some of the specs of the Creality Ender-3 as an example. If you can’t find the exact details of your printer, a quick web search should show what you need for this section.

The General tab can have anything in it, it’s just an identifier for your own use. Print bed & build volume should be easy to find out — if not, you can measure your print bed and find out the position of the origin by looking at your Cura printer profile. Leave Axes as default; for the Hotend and extruder section, defaults are almost certainly fine here (unless you’ve changed your nozzle; 0.4 is the default diameter for most consumer printers).

OctoPrint is better with a camera

Now that you’re set up with OctoPrint, you’re ready to start printing. Turn off your Raspberry Pi, then plug it into your 3D printer. After it has booted up, open OctoPrint again in your browser and take your newly WiFi-enabled printer for a spin by clicking the Connect button. After it has connected, you’ll be able to set the hot end and bed temperature, then watch as the real-time readings are updated.

In the Control tab, we can see the camera stream (if you’re using one) and the motor controls, as well as commands to home the axes. There’s a G-code file viewer to look through a cross-section of the currently loaded model, and a terminal to send custom G-code commands to your printer. The last tab is for making time-lapses; however, there is a plug-in available to help with this process.

Undoubtedly the easiest way to set up video monitoring of your prints is to use the official Raspberry Pi Camera Module. There are dozens of awesome mounts on Thingiverse for a Raspberry Pi Camera Module, to allow you to get the best angle of your models as they print. There are also some awesome OctoPrint-themed Raspberry Pi cases to house your new printer brains. While it isn’t officially supported by OctoPrint, you can use a USB webcam instead if you have one handy, or just want some very high-quality video streams. The OctoPrint wiki has a crowdsourced list of webcams known to work, as well as a link for the extra steps needed to get the webcam working correctly.

As mentioned earlier, our recommended way of printing a model using OctoPrint is to first use your slicer as you would if you were creating a file to save to a microSD card. Once you have the file, save it somewhere handy on your computer, and open the OctoPrint interface. In the bottom left of the screen, you will see the Upload File button — click this and upload the G-code you wish to print.

You’ll see the file/print details appear, including information on how long it’ll take for the object to print. Before you kick things off, check out the G-code Viewer tab on the right. You can not only scroll through the layers of the object, but, using the slider at the bottom, you can see the exact pattern the 3D printer will use to ‘draw’ each layer. Now click Print and watch your printer jump into action!

OctoPrint has scores of community-created plug-ins, but our favourite, Octolapse, makes beautiful hypnotic time-lapses. What makes them so special is that the plug-in alters the G-code of whatever object you are printing so that once each layer has finished, the extruder moves away from the print to let the camera take an unobstructed shot of the model. The result is an object that seems to grow out of the build plate as if by magic. You’ll not find a finer example of it than here.

Satisfying 3D Prints TimeLapse episode 7 (Prusa I3 Mk3 octopi)

3D Printing timelapses of models printed on the Prusa i3 MK3! Here’s another compilation of my recent timelapses. I got some shots that i think came out really great and i hope you enjoy them! as always if you want to see some of these timelapses before they come out or want to catch some behind the scenes action check out my instagram!

Thanks to Glenn and HackSpace magazine

This tutorial comes fresh from the pages of HackSpace magazine issue 26 and was written by Glenn Horan. Thanks, Glenn.

To get your copy of HackSpace magazine issue 26, visit your local newsagent, the Raspberry Pi Store, Cambridge, or the Raspberry Pi Press online store.

Fans of HackSpace magazine will also score themselves a rather delightful Adafruit Circuit Playground Express with a 12-month subscription. Sweet!

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Really, really awesome Raspberry Pi NeoPixel LED mirror

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/awesome-neopixel-led-mirror/

Check out Super Make Something’s awesome NeoPixel LED mirror: a 576 RGB LED display that converts images via the Raspberry Pi Camera Module and Raspberry Pi 3B+ into a pixelated light show.

Neopixel LED Mirror (Python, Raspberry Pi, Arduino, 3D Printing, Laser Cutting!) DIY How To

Time to pull out all the stops for the biggest Super Make Something project to date! Using 3D printing, laser cutting, a Raspberry Pi, computer vision, Python, and nearly 600 Neopixel LEDs, I build a low resolution LED mirror that displays your reflection on a massive 3 foot by 3 foot grid made from an array of 24 by 24 RGB LEDs!

Mechanical mirrors

If you’re into cool uses of tech, you may be aware of Daniel Rozin, the creative artist building mechanical mirrors out of wooden panels, trash, and…penguins, to name but a few of his wonderful builds.

A woman standing in front of a mechanical mirror made of toy penguins

Yup, this is a mechanical mirror made of toy penguins.

A digital mechanical mirror?

Inspired by Daniel Rozin’s work, Alex, the person behind Super Make Something, put an RGB LED spin on the concept, producing this stunning mirror that thoroughly impressed visitors at Cleveland Maker Faire last month.

“Inspired by Danny Rozin’s mechanical mirrors, this 3 foot by 3 foot mirror is powered by a Raspberry Pi, and uses Python and OpenCV computer vision libraries to process captured images in real time to light up 576 individual RGB LEDs!” Alex explains on Instagram. “Also onboard are nearly 600 3D-printed squares to diffuse the light from each NeoPixel, as well as 16 laser-cut panels to hold everything in place!”

The video above gives a brilliantly detailed explanation of how Alex made the, so we highly recommend giving it a watch if you’re feeling inspired to make your own.

Seriously, we really want to make one of these for Raspberry Pi Towers!

As always, be sure to subscribe to Super Make Something on YouTube and leave a comment on the video if, like us, you love the project. Most online makers are producing content such as this with very little return on their investment, so every like and subscriber really does make a difference.

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The Nest Box: DIY Springwatch with Raspberry Pi

Post Syndicated from Helen Lynn original https://www.raspberrypi.org/blog/the-nest-box-diy-springwatch/

Last week, lots and lots of you shared your Raspberry Pi builds with us on social media using the hashtag #IUseMyRaspberryPiFor. Jay Wainwright from Liverpool noticed the conversation and got in touch to tell us about The Nest Box, which uses Raspberry Pi to bring impressively high-quality images and video from British bird boxes to your Facebook feed.

Jay runs a small network of livestreaming nest box cameras, with three currently sited and another three in the pipeline; excitingly, the new ones will include a kestrel box and a barn owl box! During the spring, all the cameras stream live to The Nest Box’s Facebook page, which has steadily built a solid following of several thousand wildlife fans.

A pair of blue tits feeds their chicks in a woolly nest

The Nest Box’s setup uses a Raspberry Pi and Camera Module, along with a Raspberry Pi PoE HAT to provide both power and internet connectivity, so there’s only one cable connection to weatherproof. There’s also a custom HAT that Jay has designed to control LED lights and to govern the Raspberry Pi Camera Module’s IR filter, ensuring high-quality images both during the day and at night. To top it all off, he has written some Python code to record visitors to the nest boxes and go into live streaming mode whenever the action is happening.

As we can see from this nest box design for swifts, shown on the project’s crowdfunding profile, plenty of thought has evidently been put into the design of the boxes so that they provide tempting quarters for their feathered occupants while also accommodating all the electronic components.

Follow The Nest Box on Facebook to add British birds into your social media mix — whatever you’ve got now, I’ll bet all tomorrow’s coffees that it’ll be an improvement. And if you’re using Raspberry Pi for a wildlife project, or you’ve got plans along those lines, let us know in the comments.

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Real-life DOR-15 bowler hat from Disney’s Meet the Robinsons

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/real-life-dor-15-bowler-hat-from-disneys-meet-the-robinsons/

Why wear a boring bowler hat when you can add technology to make one of Disney’s most evil pieces of apparel?

Meet the Robinsons

Meet the Robinsons is one of Disney’s most underrated movies. Thank you for coming to my TED talk.

What’s not to love? Experimental, futuristic technology, a misunderstood villain, lessons of love and forgiveness aplenty, and a talking T-Rex!

For me, one of the stand-out characters of Meet the Robinsons is DOR-15, a best-of-intentions experiment gone horribly wrong. Designed as a helper hat, DOR-15 instead takes over the mind of whoever is wearing it, hellbent on world domination.

Real-life DOR-15

Built using a Raspberry Pi and the MATRIX Voice development board, the real-life DOR-15, from Team MATRIX Labs, may not be ready to take over the world, but it’s still really cool.

With a plethora of built-in audio sensors, the MATRIX Voice directs DOR-15 towards whoever is making sound, while a series of servos wiggle 3D‑printed legs for added creepy.

This project uses ODAS (Open embeddeD Audition System) and some custom code to move a servo motor in the direction of the most concentrated incoming sound in a 180 degree radius. This enables the hat to face a person calling to it.

The added wiggly spider legs come courtesy of this guide by the delightful Jorvon Moss, whom HackSpace readers will remember from issue 21.

In their complete Hackster walkthrough, Team Matrix Lab talk you through how to build your own DOR-15, including all the files needed to 3D‑print the legs.

Realising animated characters and props

So, what fictional wonder would you bring to life? Your own working TARDIS? Winifred’s spellbook? Mary Poppins’ handbag? Let us know in the comments below.

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Securely tailor your TV viewing with BBC Box and Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/securely-tailor-your-tv-viewing-with-bbc-box-and-raspberry-pi/

Thanks to BBC Box, you might be able to enjoy personalised services without giving up all your data. Sean McManus reports:

One day, you could watch TV shows that are tailored to your interests, thanks to BBC Box. It pulls together personal data from different sources in a household device, and gives you control over which apps may access it.

“If we were to create a device like BBC Box and put it out there, it would allow us to create personalised services without holding personal data,” says Max Leonard.

TV shows could be edited on the device to match the user’s interests, without those interests being disclosed to the BBC. One user might see more tech news and less sport news, for example.

BBC Box was partly inspired by a change in the law that gives us all the right to reuse data that companies hold on us. “You can pull out data dumps, but it’s difficult to do anything with them unless you’re a data scientist,” explains Max. “We’re trying to create technologies to enable people to do interesting things with their data, and allow organisations to create services based on that data on your behalf.”

Building the box

BBC Box is based on Raspberry Pi 3B+, the most powerful model available when this project began. “Raspberry Pi is an amazing prototyping platform,” says Max. “Relatively powerful, inexpensive, with GPIO, and able to run a proper OS. Most importantly, it can fit inside a small box!”

That prototype box is a thing of beauty, a hexagonal tube made of cedar wood. “We created a set of principles for experience and interaction with BBC Box and themes of strength, protection, and ownership came out very strongly,” says Jasmine Cox. “We looked at shapes in nature and architecture that were evocative of these themes (beehives, castles, triangles) and played with how they could be a housing for Raspberry Pi.”

The core software for collating and managing access to data is called Databox. Alpine Linux was chosen because it’s “lightweight, speedy but most importantly secure”, in Max’s words. To get around problems making GPIO access work on Alpine Linux, an Arduino Nano is used to control the LEDs. Storage is a 64GB microSD card, and apps run inside Docker containers, which helps to isolate them from each other.

Combining data securely

The BBC has piloted two apps based on BBC Box. One collects your preferred type of TV programme from BBC iPlayer and your preferred music genre from Spotify. That unique combination of data can be used to recommend events you might like from Skiddle’s database.

Another application helps two users to plan a holiday together. It takes their individual preferences and shows them the destinations they both want to visit, with information about them brought in from government and commercial sources. The app protects user privacy, because neither user has to reveal places they’d rather not visit to the other user, or the reason why.

The team is now testing these concepts with users and exploring future technology options for BBC Box.

The MagPi magazine

This article was lovingly yoinked from the latest issue of The MagPi magazine. You can read issue 87 today, for free, right now, by visiting The MagPi website.

You can also purchase issue 87 from the Raspberry Pi Press website with free worldwide delivery, from the Raspberry Pi Store, Cambridge, and from newsagents and supermarkets across the UK.

 

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Build a Raspberry Pi chartplotter for your boat

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/build-a-raspberry-pi-chartplotter-for-your-boat/

Earlier this year, James Conger built a chartplotter for his boat using a Raspberry Pi. Here he is with a detailed explanation of how everything works:

Building your own Chartplotter with a Raspberry Pi and OpenCPN

Provides an overview of the hardware and software needed to put together a home-made Chartplotter with its own GPS and AIS receiver. Cost for this project was about $350 US in 2019.

The entire build cost approximately $350. It incorporates a Raspberry Pi 3 Model B+, dAISy AIS receiver HAT, USB GPS module, and touchscreen display, all hooked up to his boat.



Perfect for navigating the often foggy San Francisco Bay, the chartplotter allows James to track the position, speed, and direction of major vessels in the area, superimposed over high-quality NOAA nautical charts.

Raspberry Pi at sea

For more nautically themed Raspberry Pi projects, check out Rekka Bellum and Devine Lu Linvega’s stunning Barometer and Ufuk Arslan’s battery-saving IoT boat hack.

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Raspberry Pi retro gaming on Reddit

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/raspberry-pi-retro-gaming-on-reddit/

Reddit was alive with the sound of retro gaming this weekend.

First out to bat is this lovely minimalist, wall-mounted design built by u/sturnus-vulgaris, who states:

I had planned on making a bar top arcade, but after I built the control panel, I kind of liked the simplicity. I mounted a frame of standard 2×4s cut with a miter saw. Might trim out in black eventually (I have several panels I already purchased), but I do like the look of wood.

Next up, a build with Lego bricks, because who doesn’t love Lego bricks?

Just completed my mini arcade cabinet that consists of approximately 1,000 [Lego bricks], a Raspberry Pi, a SNES style controller, Amazon Basics computer speakers, and a 3.5″ HDMI display.

u/RealMagicman03 shared the build here, so be sure to give them an upvote and leave a comment if, like us, you love Raspberry Pi projects that involve Lego bricks.

And lastly, this wonderful use of the Raspberry Pi Compute Module 3+, proving yet again how versatile the form factor can be.

CM3+Lite cartridge for GPi case. I made this cartridge for fun at first, and it works as all I expected. Now I can play more games l like on this lovely portable stuff. And CM3+ is as powerful as RPi3B+, I really like it.

Creator u/martinx72 goes into far more detail in their post, so be sure to check it out.

What other projects did you see this weekend? Share your links with us in the comments below.

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Musically synced car windscreen wipers using Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/musically-synced-car-windscreen-wipers-using-raspberry-pi/

Hey there! I’ve just come back from a two-week vacation, Liz and Helen are both off sick, and I’m not 100% sure I remember how to do my job.

So, while I figure out how to social media and word write, here’s this absolutely wonderful video from Ian Charnas, showing how he hacked his car windscreen wipers to sync with his stereo.

FINALLY! Wipers Sync to Music

In this video, I modify my car so the windshield wipers sync to the beat of whatever music I’m listening to. You can own this idea!

Ian will be auctioning off the intellectual property rights to his dancing wipers on eBay, will all proceeds going to a charity supporting young makers.

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Growth Monitor pi: an open monitoring system for plant science

Post Syndicated from Helen Lynn original https://www.raspberrypi.org/blog/growth-monitor-pi-an-open-monitoring-system-for-plant-science/

Plant scientists and agronomists use growth chambers to provide consistent growing conditions for the plants they study. This reduces confounding variables – inconsistent temperature or light levels, for example – that could render the results of their experiments less meaningful. To make sure that conditions really are consistent both within and between growth chambers, which minimises experimental bias and ensures that experiments are reproducible, it’s helpful to monitor and record environmental variables in the chambers.

A neat grid of small leafy plants on a black plastic tray. Metal housing and tubing is visible to the sides.

Arabidopsis thaliana in a growth chamber on the International Space Station. Many experimental plants are less well monitored than these ones.
(“Arabidopsis thaliana plants […]” by Rawpixel Ltd (original by NASA) / CC BY 2.0)

In a recent paper in Applications in Plant Sciences, Brandin Grindstaff and colleagues at the universities of Missouri and Arizona describe how they developed Growth Monitor pi, or GMpi: an affordable growth chamber monitor that provides wider functionality than other devices. As well as sensing growth conditions, it sends the gathered data to cloud storage, captures images, and generates alerts to inform scientists when conditions drift outside of an acceptable range.

The authors emphasise – and we heartily agree – that you don’t need expertise with software and computing to build, use, and adapt a system like this. They’ve written a detailed protocol and made available all the necessary software for any researcher to build GMpi, and they note that commercial solutions with similar functionality range in price from $10,000 to $1,000,000 – something of an incentive to give the DIY approach a go.

GMpi uses a Raspberry Pi Model 3B+, to which are connected temperature-humidity and light sensors from our friends at Adafruit, as well as a Raspberry Pi Camera Module.

The team used open-source app Rclone to upload sensor data to a cloud service, choosing Google Drive since it’s available for free. To alert users when growing conditions fall outside of a set range, they use the incoming webhooks app to generate notifications in a Slack channel. Sensor operation, data gathering, and remote monitoring are supported by a combination of software that’s available for free from the open-source community and software the authors developed themselves. Their package GMPi_Pack is available on GitHub.

With a bill of materials amounting to something in the region of $200, GMpi is another excellent example of affordable, accessible, customisable open labware that’s available to researchers and students. If you want to find out how to build GMpi for your lab, or just for your greenhouse, Affordable remote monitoring of plant growth in facilities using Raspberry Pi computers by Brandin et al. is available on PubMed Central, and it includes appendices with clear and detailed set-up instructions for the whole system.

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Raspberry Pi in space!

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/raspberry-pi-in-space/

We love ‘Raspberry Pi + space’ stuff. There, I’ve said it. No taksies backsies.

From high-altitude balloon projects transporting Raspberry Pis to near space, to our two Astro Pi units living aboard the International Space Station, we simply can’t get enough.

Seriously, if you’ve created anything space-related using a Raspberry Pi, please tell us!

Capturing Earth from low orbit

Surrey Satellite Technology Ltd (SSTL) sent a Raspberry Pi Zero to space as part of their Demonstration of Technology (DoT-1) satellite, launched aboard a Soyuz rocket in July.

Earth captured from Low Earth Orbit by a Raspberry Pi

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So, not that we’re complaining, but why did they send the Raspberry Pi Zero to space to begin with? Well, why not? As SSTL state:

Whilst the primary objective of the 17.5kg self-funded DoT-1 satellite is to demonstrate SSTL’s new Core Data Handling System (Core-DHS), accommodation was made available for some additional experimental payloads including the Raspberry Pi camera experiment which was designed and implemented in conjunction with the Surrey Space Centre.

Essentially, if you can fit a Raspberry Pi into your satellite, you should.


Managing Director of SSTL Sarah Parker went on to say that “the success of the Raspberry Pi camera experiment is an added bonus which we can now evaluate for future missions where it could be utilised for spacecraft ‘selfies’ to check the operation of key equipments, and also for outreach activities.”

SSTL’s very snazzy-looking Demonstration of Technology (DoT-1) satellite

The onboard Raspberry Pi Zero was equipped with a Raspberry Pi Camera Module and a DesignSpark M12 Mount Lens. Image data captured on the space-bound Raspberry Pi was sent back to the SSTL ground station via the Core-DHS.

So, have you sent a Raspberry Pi to space? Or anywhere else we wouldn’t expect a Raspberry Pi to go? Let us know in the comments!

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Control a vintage Roland pen plotter with Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/control-vintage-roland-pen-plotter/

By refitting a vintage Roland DG DXY-990 pen plotter using Raspberry Pi, the members of Liege Hackerspace in Belgium have produced a rather nifty build that writes out every tweet mentioning a specific hashtag.

Liege Hackerspace member u/iooner first shared an image of the plotter yesterday, and fellow Redditors called for video of the project in action immediately.

Watch the full video here. And to see the code code for the project, visit the Liege Hackerspace GitHub.

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Controlling a boom lift with a Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/controlling-a-boom-lift-with-a-raspberry-pi/

Do you have a spare Raspberry Pi lying around? And a Bluetooth games controller? Do you have access to boom lifts or other heavy machinery?

Well, then we most certainly (do not) have the project for you.

Allow us to introduce what is (possibly, probably, hopefully) the world’s first Raspberry Pi–controlled boom lift. Weighing in at 13,000lb, this is the epitome of DON’T try this at home.

Please don’t!

Raspberry Pi-controlled boom lift

Shared on Reddit over the weekend, u/Ccundiff12’s project received many an upvote and concerned comment, but, as the poster explains, hacking the boom is a personal project for personal use to fix a specific problem — thankfully not something built for the sake of having some fun.

Meet STRETCH. Circa 1989 Genie Boom that I bought (cheap) from a neighbor. I use it to trim trees around my property. Its biggest problem was that it always got stuck. It’s not really an off-road vehicle. It used to take two people to move it around… one to drive the lift, and the other to push it with the tractor when it lost traction. The last time it got stuck, I asked my wife to assist by driving one of the two…….. the next day I started splicing into the control system. Now I can push with the tractor & run the boom via remote!

Visit the original Reddit post for more information on the build. And remember: please do not try this at home.

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Use PlayStation Buzz! controllers with a Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/use-playstation-buzz-controllers-with-a-raspberry-pi/

Buzz! was a favourite amongst my university housemates and me. With popular culture questions asked by an animated Jason Donovan, answered using real-life quiz controllers with a big red button, what’s not to like?

But, as with most of the tech available in the early 2000s, my Buzz! controllers now sit in a box somewhere, dusty and forgotten.

That’s why it is so goshdarn delightful to see PiMyLifeUp breathe new life into these awesome-looking games controllers.

Bringing Buzz! back

The tutorial uses the hidapi library to communicate with the controllers, allowing them to control functions through the Raspberry Pi, and the Raspberry Pi to control the LED within the big red button.

By the end of this tutorial, you will have learned how to read information about all your USB devices, learned how to read data that the devices are sending back and also how to write a library that will act as a simple wrapper to dealing with the device.

Aside from the Buzz! controllers, available on eBay or similar for a few pounds, you only need a Raspberry Pi and its essential peripherals to get started, as the controllers connect directly via USB — thanks, Buzz!

PiMyLifeUp’s tutorial is wonderfully detailed, explaining the hows and whys of the lines of code needed to turn your old Buzz! controllers into a quiz game written in Python that uses the coloured buttons to answer multiple-choice questions.

Guitar Hero, dance mats, Donkey Kong Bongos — what other gaming peripherals would you like to bring back to life?

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Raspberry Pi Sense HAT impact recorder for your car

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/raspberry-pi-sense-hat-impact-recorder-for-your-car/

Let the accelerometer and gyroscope of your Raspberry Pi Sense HAT measure and record impact sustained in a car collision.

Raspberry Pi Sense HAT

The Raspberry Pi Sense HAT was originally designed for the European Astro Pi Challenge, inviting schoolchildren to code their own experiments for two Raspberry Pi units currently orbiting the Earth upon the International Space Station.

The Sense HAT is kitted out with an 8×8 RGB LED matrix and a five-button joystick, and it houses an array of useful sensors, including an accelerometer and gyroscope.

And it’s these two sensors that Instructables user Ashu_d has used for their Impact Recorder for Vehicles.

Impact Recorder for Vehicles

“Impact Recorder is designed to record impact sustained to a vehicle while driving or stationary,” Ashu_d explains. Alongside the Raspberry Pi and Sense HAT, the build also uses a Raspberry Pi Camera Module to record footage, saving video and/or picture files to the SD card for you to examine after a collision. “The impacts are stored in the database in the form of readings as well as video/picture.”

By following Ashu_d’s Instructables tutorial, you’re essentially building yourself a black box for your car, recording impact data as the Sense HAT records outside the standard parameters of your daily commute.

“Upon impact, remote users can be verified in real time,” they continue, “and remote users can then watch the saved video or take remote access to the Pi Camera Module and watch events accordingly.”

Ashu_d goes into great detail on how to use Node-RED and MQTT to complete the project, how you can view video in real time using VLC, and how each element works to create the final build over at Instructables.

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Playing Snake on a Raspberry Pi word clock

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/playing-snake-on-a-raspberry-pi-word-clock/

I have a soft spot for Raspberry Pi word clocks. True, they may not be as helpful as your standard clock face if you need to tell the time super quickly, but at least they’re easier to read than this binary clock built by engineerish.

“But Alex,” I hear you cry, “word clocks are so done. We’re over them. They’re so 2018. What’s so special about a word clock that you feel it to be worthy of a blog post?”

And the answer, dear reader, is Snake, the best gosh darn game to ever grace the screen of a mobile phone, ever — sorry, Candy Crush.

If you’re looking to build a word clock using your Raspberry Pi, here’s a great tutorial from Benedikt Künzel. And, if you’re looking to upgrade said word clock to another level and introduce it to Snake, well, actually, there isn’t a tutorial for that, yet, but there’s a whole conversation going on about it on Reddit, so you should check that out.

There is, however, a tutorial for coding your own game of Snake Slug on the Raspberry Pi Sense HAT here. So give that a whirl!

Until tomorrow, fair reader, adieu.

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Bringing a book to life with Raspberry Pi | Hello World #9

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/bringing-a-book-to-life-with-raspberry-pi-hello-world-9/

Sian Wheatcroft created an interactive story display to enable children to explore her picture book This Bear, That Bear. She explains the project, and her current work in teaching, in the newest issue of Hello World magazine, available now.

The task of promoting my first children’s picture book, This Bear, That Bear, was a daunting one. At the time, I wasn’t a teacher and the thought of standing in front of assembly halls and classrooms sounded terrifying. As well as reading the book to the children, I wanted to make my events interactive using physical computing, showing a creative side to coding and enabling a story to come to life in a different way than what the children would typically see, i.e. animated retellings.

The plan

Coming from a tech-loving family, I naturally gravitated towards the Raspberry Pi, and found out about Bare Conductive and their PiCap. I first envisaged using their conductive paint on the canvas, enabling users to touch the paint to interact with the piece. It would be some sort of scene from the book, bringing some of the characters to life. I soon scrapped that idea, as I discovered that simply using copper tape on the back of the canvas was conductive enough, which also allowed me to add colour to the piece.

I enlisted the help of my two sons (two and five at the time) — they gladly supplied their voices to some of the bears and, my personal favourite on the canvas, the ghost. The final design features characters from the book — when children touch certain areas of the canvas, they hear the voices of the characters.

The back of the canvas, covered in copper tape

Getting the project up and running went pretty smoothly. I do regret making the piece so large, though, as it proved difficult to transport across the country, especially on the busy London Underground!

Interactivity and props

The project added a whole other layer to the events I was taking part in. In schools, I would read the book and have props for the children to wear, allowing them to act out the book as I read aloud. The canvas then added further interaction, and it surprised me how excited the children were about it. They were also really curious and wanted to know how it worked. I enjoyed showing them the back of the canvas with all its copper tape and crocodile clips. They were amazed by the fact it was all run on the Raspberry Pi — such a tiny computer!

The front of the interactive canvas

Fast-forward a few years, and I now find myself in the classroom full-time as a newly qualified teacher. The canvas has recently moved out of the classroom cupboard into my newly developed makerspace, in the hope of a future project being born.

I teach in Year 3, so coding in Python or using the command line on Raspbian may be a little beyond my students. However, I have a keen interest in project-based learning and am hoping to incorporate a host of cross-curricular activities with my students involving the canvas.

I hope to instil a love for digital making in my students and, in turn, show senior leaders what can be done with such equipment and projects.

A literacy project

This work really lends itself to a literacy project that other educators could try. Perhaps you’re reading a picture book or a more text-based piece: why not get the students to design the canvas using characters from the story? The project would also work equally well with foundation subjects like History or Science. Children could gather information onto the canvas, explaining how something works or how something happened. The age of the children would influence the level of involvement they had in the rest of the project’s creation. The back end could be pre-made — older children could help with the copper tape and wiring, while younger children could stop at the design process.

Part of the project is getting the children to create sounds to go with their design, enabling deeper thinking about a story or topic.

It’s about a collaborative process with the teacher and students, followed by the sharing of their creation with the broader school community.

Get Hello World magazine issue 9 for free

The brand-new issue of Hello World is available right now as a free PDF download from the Hello World website.

UK-based educators can also subscribe to receive Hello World as printed magazine FOR FREE, direct to their door. And those outside the UK, educator or not, can subscribe to receive free digital issues of Hello World in their inbox on the day of their release.

Head to helloworld.raspberrypi.org to sign up today!

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Saving biologists’ time with Raspberry Pi

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/saving-biologists-time-with-raspberry-pi/

In an effort to save themselves and fellow biologists hours of time each week, Team IoHeat are currently prototyping a device that allows solutions to be heated while they are still in cold storage.

The IoHeat team didn’t provide any photos with their project writeup, so here’s a picture of a bored biologist that I found online

Saving time in the lab

As they explain in their prototype write-up:

As scientists working with living organisms (from single cells to tissue samples), we are often required to return to work outside of normal hours to maintain our specimens. In many cases, the compounds and solutions we are using in our line of work are stored at 4°C and need to reach 37°C before they can be used. So far, in order to do this we need to return to our workplace early, incubate our solutions at 37°C for 1–2h, depending on the required volume, and then use them in processes that often take a few minutes. It is clear that there is a lot of room here to improve our efficiency.

Controlling temperatures with Raspberry Pi

These hours wasted on waiting for solutions to heat up could be better spent elsewhere, so the team is building a Raspberry Pi–powered device that will allow them to control the heating process remotely.

We are aiming to built a small incubator that we can store in a cold room/fridge, and that can be activated remotely to warm up to a defined temperature. This incubator will enable us to safely store our reagents at low temperature and warm them up remotely before we need to use them, saving an estimate of 12h per week per user.

This is a great project idea, and they’ve already prototyped it using a Raspberry Pi, heating element, and fan. Temperature and humidity sensors connected to the Raspberry Pi monitor conditions inside the incubator, and the prototype can be controlled via Telegram.

Find out more about the project on Hackster.

We’ve got more than one biologist on the Raspberry Pi staff, so we have a personal appreciation for the effort behind this project, and we look forward to seeing how IoHeat progresses in the future.

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Take the Wizarding World of Harry Potter home with you

Post Syndicated from Alex Bate original https://www.raspberrypi.org/blog/take-the-wizarding-world-of-harry-potter-home-with-you/

If you’ve visited the Wizarding World of Harry Potter and found yourself in possession of an interactive magic wand as a souvenir, then you’ll no doubt be wondering by now, “What do I do with it at home though?”

While the wand was great for setting off window displays at the park itself, it now sits dusty and forgotten upon a shelf. But it still has life left in it — let Jasmeet Singh show you how.

Real Working Harry Potter Wand With Computer Vision and ML

A few months back my brother visited Japan and had real wizarding experience in the Wizarding World of Harry Potter at the Universal Studios made possible through the technology of Computer Vision. At the Wizarding World of Harry Potter in Universal Studios the tourists can perform “real magic” at certain locations(where the motion capture system is installed) using specially made wands with retro-reflective beads at the tip.

How do Harry Potter interactive wands work?

The interactive displays at Universal Studios’ Wizarding World of Harry Potter have infrared cameras in place, which are ready to read the correct movements of retroflector-tipped wands. Move your wand in the right way, and the cameras will recognise your spell and set window displays in motion. Oooooo…magic!

How do I know this? Thanks to William Osman and Allen Pan, who used this Wizarding World technology to turn cheap hot dogs into their own unique wands! Those boys…

Hacking Wands at Harry Potter World

How to make your very own mostly-functional interactive wand. Please don’t ban me from Universal Studios. Links on my blog: http://www.williamosman.com/2017/12/hacking-harry-potter-wands.html Allen’s Channel: https://www.youtube.com/channel/UCVS89U86PwqzNkK2qYNbk5A Support us on Patreon: https://www.patreon.com/williamosman Website: http://www.williamosman.com/ Facebook: https://www.facebook.com/williamosmanscience/ InstaHam: https://www.instagram.com/crabsandscience/ CameraManJohn: http://www.johnwillner.com/

For his Raspberry Pi-enabled wand project, Jasmeet took that same Wizarding World concept to create a desktop storage box that opens and closes in response to the correct flicks of a wand.

A simple night vision camera can be used as our camera for motion capture as they also blast out infrared light which is not visible to humans but can be clearly seen with a camera that has no infrared filter.

So, the video stream from the camera is fed into a Raspberry Pi which has a Python program running OpenCV which is used for detecting, isolating and tracking the wand tip. Then we use SVM (Simple Vector Machine) algorithm of machine learning to recognize the pattern drawn and accordingly control the GPIOs of the raspberry pi to perform some activities.

For more information on the project, including all the code needed to get started, head over to hackster.io to find Jasmeet’s full tutorial.

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