Workshop: Assembling the Tinusaur Kit in Varna, Bulgaria

This Saturday, September 2nd, we will have one day workshop for assembling the Tinusaur kits for those who supported our Indiegogo crowdfunding campaign. It will take place in Varna, Bulgaria, our host will be VarnaLab – the local hackerspace. We will learn the basics of electronic components, microcontrollers – ATtiny85 in particular and, of course, […]

via Workshop: Assembling the Tinusaur Kit in Varna, Bulgaria — The Tinusaur Project

Workshop: Assembling the Tinusaur Kit in Varna, Bulgaria

pockeTETRIS: compact Tetris clone using ATtiny85 and OLED

[dombeef] originally built pocketTETRIS as a Father’s Day gift for his Tetris-loving pops. However, having finished the project he’s decided to share it with the universe, and it’s looking rather sweet. He made the game the smallest he could make, with size limitations imposed by a 0.96” OLED display, the coin-cell battery pack, and his desire…

via Mini Tetris Game Packs a Tiny85 — Hackaday

pockeTETRIS: compact Tetris clone using ATtiny85 and OLED


From Sven Gregori on


the USB MIDI keyboard dedicated to play all the four chord songs, from Adele via Green Day and Red Hot Chilli Peppers to U2 and Weezer. Thanks to MIDI, you can be any instrument – and all of them at once. Yay!
 Built around an AVR ATmega328 and Objective Development’s V-USB library, 4chord MIDI acts as a regular USB MIDI instrument. It supports playback in every key and five different playback modes:
  • simple triad chord (root, third, fifth)
  • triad chord + third + fifth + third as quarter notes
  • triad chord + third + fifth + octave as quarter notes
  • root note + third + fifth + third as quarter notes
  • root note + third + fifth + octave as quarter notes

The playback tempo can be set between 60 and 240 bpm.

Here is the board in action:

The design files and source code are available on GitHub:



ATXMega32E5 adapted for a breadboard


ATXMega32E5 breakout board

The ATXMega32E5 is the next step up for those experienced with the AVR series of microcontrollers from Microchip (formerly Atmel). They use the same compilers and libraries as the rest of the AVR 8- and 16-bit families, but they can run at 32 MHz and have an amazingly powerful set of internal peripherals that can take your projects to the next level and beyond.


For prototyping, however, the disadvantage is that the XMega chips are not available as through-hole parts. That’s where this breakout board comes into play.

nsayer has shared the board on OSH Park:

ATXMega_E5 breakout v1.0

Order from OSH Park

ATXMega32E5 adapted for a breadboard

Programming Surface Mounted Chips

Ken Olsen writes in a Surface Mount Challenge project log on


Programming Surface Mounted Chips

A majority of my projects to date have used DIP package Attiny85, 84, and Atmega328. These are usually programmed beforehand using a ISP shield on an Arduino, or afterwards using the ISP header. My first PCB design, was in fact, a shield which could be used to program the variety of AVR chips I was using. Breadboarding up an Arduino-as-ISP circuit time every time I needed one was error-prone and frustrating.


It occurred to me that since not all projects have ISP headers, there should be some way to program the chips prior to installation. With a little googling, I found SOIC to DIP adapters which can be used to mate up with a DIP ZIF fixture. A SOIC 20 allows me to program the AVR 8-pin, 14-pin, and 20-pin packages!

Programming Surface Mounted Chips

From Proof of Concept to Prototype

From the Rebooting Electronics blog by Steve Mayze:

From Proof of Concept to Prototype

In the last entry for the Timed LED Lighting Controller, I realised that there are no working examples of an I²C driver for the ATtiny20. I then had to work through the data sheet to implement my own. With that done, I could then start on the application firmware and get the board really working. So this is where my proof of concept becomes the prototype.

From Proof of Concept to Prototype

Musical Toothbrush by Joe Grand

Hackaday wrote about a nifty hack by Joe Grand:


[Joe Grand’s] Toothbrush Plays Music That Doesn’t Suck

It’s not too exciting that [Joe Grand] has a toothbrush that plays music inside your head. That’s actually a trick that the manufacturer pulled off. It’s that [Joe] gave his toothbrush an SD card slot for music that doesn’t suck. The victim donor hardware for this project is a toothbrush meant for kids called Tooth Tunes.…


Joe published full documentation for the project on his website:

The PCB is shared on OSH Park:

Tooth Tunes Hack

Order from OSH Park

Joe describes the project in this video:

Hear the toothbrush in action:

Musical Toothbrush by Joe Grand