Johan Kanflo has been using Arduino compatible boards based on Tiny328 MCU with an ISM radio module (wireless Arduino clone), but he found that finding a case was not easy, and was quite not ready to to design its own and print it with a 3D printer. So instead he shrank the board to fit into an AA battery case bought on Ebay with two AA batteries taking the remaining slots. That’s the result.
AAduino board specifications:
- MCU – Atmel ATMega328p clocked at 8 MHz to save power
- Radio – RFM69C ISM transceiver module
- Sensors – Two DS18B20 temperature sensors
- Misc – Indicator LED
- Keystone battery terminals rotated 180° to act as positive and negative terminals.
- Power – 2x AA batteries
The project is also open source hardware, with all hardware files released under the MIT license on Github, where you’ll also find a demo sketch for the board.