Switch branches/tags
Nothing to show
Find file History
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.
SPI pins.png



Here's both the Arduino files and pre-compiled hex files ready for uploading. You will need some type of ISP programmer to upload the code. I use an Arduino Leonardo as a programmer. It's easiest to do this with the ATTiny on the board, with only the capacitor and voltage regulator.

The programming pins are

  • RESET - 1
  • MOSI - 5
  • MISO - 6
  • SCK - 7

You also need to program the fuses to disable the reset line, as it's used as one of the ADC inputs.

Fuses should be set to

  • Low 0xE2
  • High 0x77
  • Extended 0xFF

If for some reason you need to reprogram, you'll have to remove the ATTiny and use a high-voltage serial programmer.