Tag Archives: bluetooth

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!

The post Motorised Skateboard appeared first on Raspberry Pi.

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.

Developing smart sensor solutions

via Dangerous Prototypes


Ken Boak has published a new build, the MSP430i2041 bluetooth smart sensor board:

One of our existing products at work, which I designed about 2 years ago, makes use of the STM32F373 microcontroller interfaced to an AD7767 24-bit sigma-delta ADC, to create a smart sensor.
Whilst at the time of development, (Feb 2014) – this seemed to be an economical solution, our requirements have changed a little, in that we wish to add Bluetooth Low Energy Connectivity, LiPo battery support and the means to drive an OLED display. These functions could be added in the form of an additional pcb (similar to the Arduino shield concept), and provision had been made to accommodate such a board with an expansion connector, but after reviewing all of the costs, it was decided that a new approach – and a new dedicated pcb design would be ultimately preferable.

Project info at Ken’s blog.

OSWatch, an open source watch

via Hackaday » hardware

If you are a soldering ninja with a flair for working with tiny parts and modules, check out the Open Source Watch a.k.a. OSWatch built by [Jonathan Cook]. His goals when starting out the project were to make it Arduino compatible, have enough memory for future applications, last a full day on one charge, use BLE as Central or Peripheral and be small in size. With some ingenuity, 3d printing and hacker skills, he was able to accomplish all of that.

OSWatch is still a work in progress and with detailed build instructions available, it is open for others to dig in and create their own versions with modifications – you just need to bring in a lot of patience to the build. The watch is built around a Microdunio Core+ board, an OLED screen, BLE112A module, Vibration motor, a couple of LEDs and Buttons, and a bunch of other parts. Take a look at the schematics here. The watch requires a 3V3, 8MHz version of the Microdunio Core+ (to ensure lower power consumption), and if that isn’t readily available, [Jonathan]  shows how to modify a 5V, 16MHz version.


A set of 3D printed parts [ZIP file] houses all of the parts in a neat bundle. A detailed sub-set of instructions by [Jonathan] shows you how to go from the raw 3D printed parts to a slick looking enclosure for the watch. This guide in itself is a great resource that shows a lot of tricks on post-processing 3D printed parts. One trick he shows is how to use a screw heated with a soldering iron to create a counter-sunk recess in the 3D printed plastic. For the Display, he used a mono OLED screen, for its easy availability and low cost. But he lists out a couple of other devices under Display Options, in case you want to use a Sharp Memory Display or a color OLED screen. On his Github repo, you will find the Arduino code as well as a rudimentary iOS app.

When you are done with most of the assembly, you end up with three layers – the ‘back’ containing the battery, charging port, vibration motor and a couple of discrete parts, the ‘middle’ containing the electronic modules, buttons, programming ports and the ‘front’ housing the display and a couple of LEDs. Put it all together and you are ready to strut your OSWatch. What we love about this project is the sheer level of build instructions and details provided by [Jonathan] that lets anyone with the right set of skills replicate his work. And if you would like to look at some more smart watch options, here’s Open Source Smart Watch , the OSHWatch  and the Zerowatch.

Filed under: hardware, wearable hacks