Tag Archives: bluetooth

30kmph Bluetooth skateboard from the Raspberry Pi Guy

via Raspberry Pi

We are immensely fond of tutorial-maker extraordinaire Matt Timmons-Brown, who you may know as The Raspberry Pi Guy, and we treasure his widdle brain. Matt, please wear a helmet consistently next time you use this skateboard monster thing.

DIY 30KM/H ELECTRIC SKATEBOARD – RASPBERRY PI POWERED

Over the summer, I made my own electric skateboard using a £4 Raspberry Pi Zero. Controlled with a Nintendo Wiimote, capable of going 30km/h, and with a range of over 10km, this project has been pretty darn fun. In this video, you see me racing around Cambridge and I explain the ins and outs of this project.

This is a beautiful build, with a Bluetooth-connected Raspberry Pi Zero controlling the speed of the brushless motor that drives the board. Matt’s using a Wiimote to control the speed, and terrifying the residents of Cambridge into the bargain.

The metal boxes underneath the skateboard that Matt’s made to house the battery and electronics are, in a way, the most important part of the build. When you’re tooling along at 30kmph, the last thing you want to do is to grate your lithium-ion battery on the tarmac at speed.

Matt visited Pi Towers to show us what he’d made, and Gordon had a go. You’ll want to turn the sound on.

Sk8r Pi ft. The Raspberry Pi Guy… and Gordon

The Raspberry Pi Guy popped into Pi Towers to show off his new creation. While skating up and down the office on his Pi-powered skateboard, our Director of Software Engineering, Gordon Hollingworth, decided to have a go.

Beautiful build, Matt – thanks for sharing!

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Internet of Things Pregnancy Test

via Raspberry Pi

“The project idea came from this tongue-in-cheek Twitter post. But hey, why not try to make one? I read somewhere that the world needs more ridiculous smart devices”. These are the words of Eric Tsai, a maker of connected devices and home automation, on his website etsai.net. And while this website boasts many interesting and useful projects (plus a watermelon sea monster), it was his tongue-in-cheek ‘Too Much IoT’ project on hackster.io that had us chuckling. The aforementioned Twitter post?

Eric Tsai on Twitter

IoT pregnancy test: connects to phone via BLE, instantly tweets test results. Also text msg result to contacts name “mom”.

Eric did indeed create an IoT pregnancy test: it’s a Bluetooth-enabled digital pregnancy test that sends data to a Raspberry Pi which, in turn, sends a tweet of the result (as well as a special text message to your Mum).

To start his project, Eric turned to an unsuspecting customer service representative, quizzing her on the composition of a digital pregnancy test:

Does your test have an ON button? What kind of battery does it use? Do the different characters on the LCD overlap, or are they separated? Well, I mean, is “Pregnant” the same as “Not Pregnant”, but just without the “Not”? You need a serial number? No, I don’t have a serial number, I haven’t purchased it yet. Oh, well… I like to be prepared.

And after that, a search of YouTube provided the information he needed in order to hack the test.

IoT Pregnancy Test

After working his way through the internals of the test, the LCD pins, and the energy consumption, Eric was able to hijack the correct components and solder new wiring to gain control of the ‘not’ and ‘pregnant’ portions of the display, along with the clock function and, obviously, the ground.

IoT Pregnancy Test

Eric added header pins to the test, allowing him to connect a Light Blue Bean, which in turn provided Bluetooth and I/O functionality. He explains:

The Light Blue Bean provides the real world I/O and Bluetooth connectivity. The digital I/O monitors the “Not” and “Pregnant” pins on the LCD and compares them to the “clock”. When they don’t match, it means the corresponding icon is being displayed.

The Raspberry Pi runs Node-RED to receive data from the Bean. Using Twilio, the Pi can tweet, text, or email the information to any predetermined recipient, advising them of the test results.

IoT Pregnancy Test

As a home automation pro, Eric already had several lights in his house set up via MQTT and OpenHAB, so it wasn’t hard for him to incorporate them into the project, triggering them to light up to indicate a positive result.

Though the project was originally started as a joke, it’s clear to see that Eric enjoyed the process and learnt from the experience. And if that wasn’t enough, he also used the hackster.io project page as a means of announcing the news of his own impending bundle of joy. So congratulations to Eric and his family, and thank you for this brilliant project!

Too Much IoT on Twitter

Pregnant! Yay!

Connected Pregnancy Test – Long Version

A pregnancy test that tweets and text messages test results. https://www.hackster.io/projects/15076/

 

 

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Upgrade your USB keyboard to Bluetooth with this Arduino device

via Arduino Blog

If you have an old keyboard lying around and wish it were wireless, Maker DastardlyLabs has a solution.

The “HID Relay” is a small adapter that uses an Arduino Pro Mini, a Bluetooth module, a USB host shield, and a few other components to upgrade any USB keyboard to Bluetooth. DastardlyLabs has made three videos to explain the entire “Bluetooth-ification” process–which can be found below.

So far, the method has worked with all of the keyboards that DastardlyLabs has tested it on, as well as most mice (except for one “gamingish” USB mouse). The Arduino source code and build notes are available on GitHub. The HID Relay was inspired by a recent Arduino hack by Evan Kale. 

Dtto is a self-reconfigurable modular robot

via Arduino Blog

An entry in this year’s Hackaday Prize, Dtto is a snake-like robot designed to be modular and self-reconfigurable.

Inspired by Bruce Lee’s famous water quote, Dtto can transform into various shapes by changing the position and connection of its 3D-printed modules. As Hackaday points out, each section of Dtto is a double-hinged joint. When two come together, magnets help them align. A servo-controlled latch solidly docks the sections, which then work in unison. Impressively, it can connect and separate segments autonomously – without any human intervention. Creator Alberto believes the versatility of the bot will enable it to perform rescue missions, explore unknown environments, and operate in space.

The open-source robot consists of an Arduino Nano, a Bluetooth HC-06 module, an NRF2401+ radio transceiver, two SG92R Tower Pro servos for main movement, three Tower Pro SG90 micro servos for coupling, and a WS2812 RGB LED. For its latest iteration, the Maker has made a few design improvements to allot for 25% more internal space, a data bus connecting the two blocks and Tower Pro MG92B motors. Future modules will even include a built-in camera, an ultrasonic sensor, a gyroscope, an accelerometer, and a magnetometer, to name just a few. Until then, you can follow along on its project page and check out a few of its videos below.

Motorised Skateboard

via Raspberry Pi

Hello there. I’m Alex, the newest inhabitant of Pi Towers. I like to build things like modified Nerf guns and Iron Man masks (Team Stark for life! Sorry Liz), and when I’m not doing that, I get to search for all your amazing Pi projects and share them with the world via our social media. So keep it up!

Since arriving at Pi Towers my imagination has been running on overdrive, thinking of all the possible projects I can do with this incredible micro-powerhouse. I like to make stuff… and now I can make stuff that does stuff, thanks to the versatility of the Pi.

With this in mind, it’s no surprise that my return from lunch on my first day with a skateboard under my (rain-sodden) arm was met with this project in an email from Liz.

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A Raspberry Pi-powered motorised skateboard, controlled via a Wii Remote? What’s not to love? The skateboard, Raspberry Pi, and console gaming enthusiast in me rejoiced as I wrung rainwater from my hoodie.

raspberry pi skateboard

As part of a university assignment to produce a project piece that incorporates a Raspberry Pi, Tim Maier constructed this beast of a machine using various components that are commonly found over the internet or at local tech stores. Essentially, Tim has provided me with the concept for my first Raspberry Pi project and I already have the deck at my disposal. And a Raspberry Pi. Motors and batteries litter the cupboards at Pi Towers like dead moths. And I’m sure there’s somebody around here I can beg a Wiimote from.

Raspberry Pi Bluetooth Electric Skateboard IFB102

This project was part of an assignment for university where the prerequisite was to build something with a Raspberry Pi.

What I really love about this project is that once again we see how it’s possible to build your own tech items, despite how readily available the complete builds are online or in stores. Not only do you save money – and in the case of a motorised skateboard, we’re easily talking hundreds of pounds – but you also get that added opportunity to smugly declare “Oh this? I made it myself” that you simply don’t get when opening the packaging of something pre-made.

Hats (or skate caps) off to Tim and this wonderful skateboard. Tim: if you’re reading this, I’d love to know what your final mark was!

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Wear a connected hoodie that displays tweets and text

via Arduino Blog

Let’s face it, developers and programmers love their hoodies. That’s why last fall, a few members of the FirstBuild team built a connected sweatshirt capable of displaying text and tweets with a specific hashtag.

The hoodie is equipped with a Blend Micro board and a 16 x 32 LED matrix panel with a plastic overlay that’s sewn into a cutout on the front of the shirt. The system connects with a smartphone over Bluetooth to reveal the message, though in the future its creators hope to add animated GIFs.

Power is supplied through a USB battery placed inside a wearer’s pants or the hoodie’s pocket, in which case a USB cable can simply run from the Blend Micro. Ready to turn some heads as you walk down the street? You can check out FirstBuild’s entire project step-by-step here.