From the Rebooting Electronics blog by Steve Mayze:
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.
Hackaday wrote about a nifty hack by Joe Grand:
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:
Joe describes the project in this video:
Hear the toothbrush in action:
Lucky Resistor designed this programming adapter for ATtiny13 and similar chips:
As mentioned in my article about designing a cheap plant watering sensor, I built a small adapter which can be used to pre-program the ATtiny13A. This is necessary, because once soldered on the board, I only have a debugWire interface, which has to be enabled first.
The adapter has a small 50mil JTAG header, where the Atmel ICE can be connected with the board. There is also room for a USB mini jack, which is used to power the MCU while programming. A small on-off switch is used to power the MCU and a LED is placed as indicator to see if the MCU has power.
One of the DIL/ZIF adapters is mounted on top of the female headers. Most of the adapters for SO-8, SO-14 and SO-16 will work with this board.
To make the board more versatile, I added a number of jumpers and solder points. By default, the adapter is connecting to the right pins for the ATtiny13A, but you can cut these routes and solder wires onto the board to implement any kind of connection you like.
The design files are available on GitHub:
LuckyResistor has shared the board on OSH Park:
Neven Boyanov has launched a new Tinusaur campaign on IndieGoGo:
The Tinusaur is powered by the Atmel ATtiny85 microcontroller.
We want to bring the cost down to $3 for the basic “lite” boards
and allow more people to be able to get them.
DanR has shared this motion sensing night light board:
This light is powered by an ATtiny45/85 which powers on the 14 LED lights when motion is sensed and it is in a dark room. The light sensor on the board will not allow the lights to come on if it is in a reasonably lit room.
It is fitted with a barrel plug for power, this model specifically with an L7805CV voltage regulator.
Yay, another mini-project with the ATtiny10! A while ago I devised a scheme to drive an electronic dice with only two IO lines. I finally found the time and motivation to build up a small design using this as an entry for the hackaday 1k compo
via DICE10 – electronic dice controlled by two GPIO. — Tim’s Blog