Simple PCB to control computer fan speed with a atinny88
The board runs out of the fan 12V, step down to 3.3V with an LDO.
It provides a PWM header in and PWM out. The MCU is able to intercept the signal of the tachometer and generated a new PWM signal.
The uart is accesible through a two pin headeris. External FTDI bridge is required if you want to connect it to the computer.
The board is programmed thorugh ISP with a Tag-connect cable or UART if a bootloader if it has been previously programmed.
- 3 DIP switches
- 1 Push button
- 2 LEDs
- NTC sensor.
- I2C port (As SMD pads)
- PMW in
- PWM out
- UART