157 Breathing LED
157 : Breathing LED
- Author: argunda
- Description: Use the pwm output to drive an LED and it should look like it's breathing.
- GitHub repository
- Clock: 4000 Hz
How it works
A triangle wave is generated and used to determine duty cycle of pwm.
How to test
After reset, pwm should automatically be generated. The duty counter is output for debug purposes.
External hardware
Clock source and external LED circuit.
IO
| # | Input | Output |
|---|---|---|
| 0 | clock | breathing_pwm |
| 1 | reset | duty[0] |
| 2 | duty[1] | |
| 3 | duty[2] | |
| 4 | duty[3] | |
| 5 | duty[4] | |
| 6 | duty[5] | |
| 7 | duty[6] |