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Source code to the CharlieStar project on mitxela.com. Runs on an ATtiny9, drives six charlieplexed LEDs from the three IO pins. Works great with a 3V lithium coin cell. Pressing the reset switch cycles through the following modes:

  • pulsate in a swirling pattern
  • flash a message in morse code
  • flicker (uses a pseudorandom number generator)
  • power-off

The morse code message is in program memory at line 342, it's a zero-terminated string that can be up to 127 characters.

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