https://github.com/mutcianm/tinyfireflies

Fireflies in a jar using charlieplexing and bit angle modulation
https://github.com/mutcianm/tinyfireflies

attiny attiny13 avr bam charlieplexing fireflies leds

Last synced: 4 months ago
JSON representation

Fireflies in a jar using charlieplexing and bit angle modulation

• Host: GitHub
• URL: https://github.com/mutcianm/tinyfireflies
• Owner: mutcianm
• Created: 2018-02-15T13:56:58.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2018-04-07T15:23:12.000Z (about 8 years ago)
• Last Synced: 2025-10-20T07:55:31.190Z (8 months ago)
• Topics: attiny, attiny13, avr, bam, charlieplexing, fireflies, leds
• Language: CMake
• Size: 6.84 KB
• Stars: 0
• Watchers: 0
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
# Tiny13 Firefles #

- the LEDs flicker randomly imitating fireflies

- 6 LEDs on 3 pins(PB0-PB2) using charlieplexing and bit angle modulation(more efficient PWM alternative for leds) for dimming

- BAM implemented with hardware timer in CTC mode

- could easily be scaled to 20 LEDs with almost no code changes(rewriting charlieplexing bitmasks)

- randomness implemented with linear congruential generator with seed persisted in eeprom and incremented on each power on

- 0.25 mA power consumption on a 3V CR2032

## TODO

- watchdog for even deeper sleep during dim phase

- button for toggling power(manual deep sleep)

### Example videos

[![demo board](https://i.imgur.com/Mfi7AtL.png?2)](https://i.imgur.com/cufzkq7.mp4) [![bottled](https://i.imgur.com/VsxKpeM.png)](https://i.imgur.com/o5OHXny.mp4)