Tag Archives: YouTubers

Hire Raspberry Pi as a robot sous-chef in your kitchen

via Raspberry Pi

Design Engineering student Ben Cobley has created a Raspberry Pi–powered sous-chef that automates the easier pan-cooking tasks so the head chef can focus on culinary creativity.

Ben named his invention OnionBot, as the idea came to him when looking for an automated way to perfectly soften onions in a pan while he got on with the rest of his dish. I have yet to manage to retrieve onions from the pan before they blacken so… *need*.

OnionBot robotic sous-chef set up in a kitchen
The full setup (you won’t need a laptop while you’re cooking, so you’ll have counter space)

A Raspberry Pi 4 Model B is the brains of the operation, with a Raspberry Pi Touch Display showing the instructions, and a Raspberry Pi Camera Module keeping an eye on the pan.

OnionBot robotic sous-chef hardware mounted on a board
Close up of the board-mounted hardware and wiring

Ben’s affordable solution is much better suited to home cooking than the big, expensive robotic arms used in industry. Using our tiny computer also allowed Ben to create something that fits on a kitchen counter.

OnionBot robotic sous-chef hardware list

What can OnionBot do?

  • Tells you on-screen when it is time to advance to the next stage of a recipe
  • Autonomously controls the pan temperature using PID feedback control
  • Detects when the pan is close to boiling over and automatically turns down the heat
  • Reminds you if you haven’t stirred the pan in a while
OnionBot robotic sous-chef development stages
Images from Ben’s blog on DesignSpark

How does it work?

A thermal sensor array suspended above the stove detects the pan temperature, and the Raspberry Pi Camera Module helps track the cooking progress. A servo motor controls the dial on the induction stove.

Screenshot of the image classifier of OnionBot robotic sous-chef
Labelling images to train the image classifier

No machine learning expertise was required to train an image classifier, running on Raspberry Pi, for Ben’s robotic creation; you’ll see in the video that the classifier is a really simple drag-and-drop affair.

Ben has only taught his sous-chef one pasta dish so far, and we admire his dedication to carbs.

Screenshot of the image classifier of OnionBot robotic sous-chef
Training the image classifier to know when you haven’t stirred the pot in a while

Ben built a control panel for labelling training images in real time and added labels at key recipe milestones while he cooked under the camera’s eye. This process required 500–1000 images per milestone, so Ben made a LOT of pasta while training his robotic sous-chef’s image classifier.

Diagram of networked drivers and devices in OnionBot robotic sous-chef

Ben open-sourced this project so you can collaborate to suggest improvements or teach your own robot sous-chef some more dishes. Here’s OnionBot on GitHub.

The post Hire Raspberry Pi as a robot sous-chef in your kitchen appeared first on Raspberry Pi.

Be a better Scrabble player with a Raspberry Pi High Quality Camera

via Raspberry Pi

One of our fave makers, Wayne from Devscover, got a bit sick of losing at Scrabble (and his girlfriend was likely raging at being stuck in lockdown with a lesser opponent). So he came up with a Raspberry Pi–powered solution!

Using a Raspberry Pi High Quality Camera and a bit of Python, you can quickly figure out the highest-scoring word your available Scrabble tiles allow you to play.

Hardware

  • Raspberry Pi 3B
  • Compatible touchscreen
  • Raspberry Pi High Quality Camera
  • Power supply for the touchscreen and Raspberry Pi
  • Scrabble board

You don’t have to use a Raspberry Pi 3B, but you do need a model that has both display and camera ports. Wayne also chose to use an official Raspberry Pi Touch Display because it can power the computer, but any screen that can talk to your Raspberry Pi should be fine.

Software

Firstly, the build takes a photo of your Scrabble tiles using raspistill.

Next, a Python script processes the image of your tiles and then relays the highest-scoring word you can play to your touchscreen.

The key bit of code here is twl, a Python script that contains every possible word you can play in Scrabble.

From 4.00 minutes into his build video, Wayne walks you through what each bit of code does and how he made it work for this project, including how he installed and used the Scrabble dictionary.

Fellow Scrabble-strugglers have suggested sneaky upgrades in the comments of Wayne’s YouTube video, such having the build relay answers to a more discreet smart watch.

No word yet on how the setup deals with the blank Scrabble tiles; those things are like gold dust.

In case you haven’t met the Raspberry Pi High Quality Camera yet, Wayne also did this brilliant unboxing and tutorial video for our newest piece of hardware.

And for more projects from Devscover, check out this great Amazon price tracker using a Raspberry Pi Zero W, and make sure to subscribe to the channel for more content.

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Wes’s wonderful Minecraft user notification display

via Raspberry Pi

This Minecraft sign uses a Raspberry Pi to notify you when, and how many of, your friends are logged into your dedicated Minecraft server.

Let’s start by pointing out how wonderfully nostalgic many of Wes ‘Geeksmithing’ Swain’s projects are. From his Raspberry Pi–housing cement Thwomp that plays his favourite Mario games to The NES Project, his NES replica unit with a built-in projector — Wes makes the things we wished for as kids.

The NES Project covered in HackSpace magazine

We honestly wouldn’t be surprised if his next project is a remake of Duckhunt with servo-controlled ducks, or Space Invaders but it’s somehow housed in a flying space invader that shoots back with lasers. Honestly, at this point, we wouldn’t put it past him.

Making the Minecraft friend notification display

In the video, Wes covers the project in two parts. Firstly, he shows off the physical build of making the sign, including laser-cut acrylic front displayed with controllable LED lights, a Raspberry Pi Zero, and the wooden framing.

Secondly, he moves on to the code, in which he uses mcstatus, a Python class created by Minecraft’s Technical Director Nathan Adams that can be used to query servers for information. In this instance, Wes is using mcstatus to check for other players on his group’s dedicated Mincecraft server, but the class can also be used to gather mod information. You can find mcstatus on GitHub.

Each friend is assigned a letter that illuminates if they’re online.

Lucky for Wes, he has the same number of friends on his server as the number of letters in ‘Minecraft’, so for every friend online, he’s programmed the display to illuminate a letter of the Minecraft logo. And while the server is empty, he can also set the display to run through various light displays, including this one, a dedication to the new Minecraft Nether update.

If you’d like to try making this project yourself, you can: Wes goes into great detail in his video, and the code for the project can be found on his GitHub account.

And while we have your attention, be sure to subscribe to Geeksmithing on YouTube and show him some love for such a great project.

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Fix slow Nintendo Switch play with your Raspberry Pi

via Raspberry Pi

Is your Nintendo Switch behaving more like a Nintendon’t due to poor connectivity? Well, TopSpec (hosted Chris Barlas) has shared a brilliant Raspberry Pi-powered hack on YouTube to help you fix that.

 

Here’s the problem…

When you play Switch online, the servers are peer-to-peer. The Switches decide which Switch’s internet connection is more stable, and that player becomes the host.

However, some users have found that poor internet performance causes game play to lag. Why? It’s to do with the way data is shared between the Switches, as ‘packets’.

 

What are packets?

Think of it like this: 200 postcards will fit through your letterbox a few at a time, but one big file wrapped as a parcel won’t. Even though it’s only one, it’s too big to fit. So instead, you could receive all the postcards through the letterbox and stitch them together once they’ve been delivered.

Similarly, a packet is a small unit of data sent over a network, and packets are reassembled into a whole file, or some other chunk of related data, by the computer that receives them.

Problems arise if any of the packets containing your Switch game’s data go missing, or arrive late. This will cause the game to pause.

Fix Nintendo Switch Online Lag with a Raspberry Pi! (Ethernet Bridge)

Want to increase the slow internet speed of your Nintendo Switch? Having lag in games like Smash, Mario Maker, and more? Well, we decided to try out a really…

Chris explains that games like Call of Duty have code built in to mitigate the problems around this, but that it seems to be missing from a lot of Switch titles.

 

How can Raspberry Pi help?

The advantage of using Raspberry Pi is that it can handle wireless networking more reliably than Nintendo Switch on its own. Bring the two devices together using a LAN adapter, and you’ve got a perfect pairing. Chris reports speeds up to three times faster using this hack.

A Nintendo Switch > LAN adaptor > Raspberry Pi

He ran a download speed test using a Nintendo Switch by itself, and then using a Nintendo Switch with a LAN adapter plugged into a Raspberry Pi. He found the Switch connected to the Raspberry Pi was quicker than the Switch on its own.

At 02mins 50secs of Chris’ video, he walks through the steps you’ll need to take to get similar results.

We’ve handily linked to some of the things Chris mentions here:

 

 

To test his creation, Chris ran a speed test downloading a 10GB game, Pokémon Shield, using three different connection solutions. The Raspberry Pi hack came out “way ahead” of the wireless connection relying on the Switch alone. Of course, plugging your Switch directly into your internet router would get the fastest results of all, but routers have a habit of being miles away from where you want to sit and play.

Have a look at TopSpec on YouTube for more great videos.

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These loo rolls formed a choir

via Raspberry Pi

Have all of y’all been hoarding toilet roll over recent weeks in an inexplicable response to the global pandemic, or is that just a quirk here in the UK? Well, the most inventive use of the essential household item we’ve ever seen is this musical project by Max Björverud.

Ahh, the dulcet tones of wall-mounted toilet roll holders, hey? This looks like one of those magical ‘how do they do that?’ projects but, rest assured, it’s all explicable.

Max explains that Singing Toilet is made possible with a Raspberry Pi running Pure Data. The invention also comprises a HiFiBerry Amp, an Arduino Mega, eight hall effect sensors, and eight magnets. The toilet roll holders are controlled with the hall effect sensors, and the magnets connect to the Arduino Mega.

In this video, you can see the hall effect sensor and the 3D-printed attachment that holds the magnet:

Max measures the speed of each toilet roll with a hall effect sensor and magnet. The audio is played and sampled with a Pure Data patch. In the comments on his original Reddit post, he says this was all pretty straight-forward but that it took a while to print a holder for the magnets, because you need to be able to change the toilet rolls when the precious bathroom tissue runs out!

Max began prototyping his invention last summer and installed it at creative agency Snask in his hometown of Stockholm in December.

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Resurrecting a vintage microwave sensor with Raspberry Pi

via Raspberry Pi

Here’s one of those lovely “old tech new spec” projects, courtesy of hackster.io pro Martin Mander.

After finding a vintage Apollo microwave detector at a car boot sale, and realising the display hole in the top was roughly the same size as a small Adafruit screen, he saw the potential to breath new life into its tired exterior. And resurrected it as a thermal camera!

Right up top – the finished product!

Martin assumes it would have been used to test microwave levels in some kind of industrial setting, given microwave ovens were a rarity when it was produced.

Old components stripped and ready for a refit

Anyhow, a fair bit of the original case needed to be hacked at or sawn off to make sure all the new components could fit inside.  A Raspberry Pi Zero provides the brains of the piece. Martin chose this because he wanted to run the scipy python module to perform bicubic interpolation on the captured data, making the captured images look bigger and better. The thermal sensor is an Adafruit AMG8833IR Thermal Camera Breakout, which uses an 8×8 array of sensors to create the heat image.

The tiny but readable display screen

The results are displayed in real time on a bright 1.3″ TFT display. Power comes from a cylindrical USB battery pack concealed in the hand grip, which is recharged by opening up the nose cone and plugging in a USB lead. Just three Python scripts control the menu logic, sensor, and Adafruit.io integration, with the display handled by PyGame.

It gets better: with the click of a button, a snapshot of whatever the thermal camera is looking at is taken and then uploaded to an Adafruit dashboard for you to look at or share later.

Sensor and screen wired up

Martin’s original post is incredibly detailed, walking you through the teardown of the original piece, the wiring, how to tweak all the code and, of course, how he went about giving it that fabulous BB-8 orange-and-white makeover. He recorded the entire process in this 24-minute opus:

Apollo Pi Thermal Camera

This vintage Apollo microwave detector now has a shiny new purpose as a thermal camera, powered by a Raspberry Pi Zero with an Adafruit thermal camera sensor…

But what can you actually do with it? Martin’s suggestions range from checking your beer is cold enough before opening it, to testing your washing machine temperature mid-cycle. If you watch his video, you’ll see he’s also partial to monitoring cat tummy temperatures. His kid doesn’t like having his forehead Apollo Pi’d though.

Check out more of Martin’s projects on hackster.io.

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