PWM fan controller with PIC 12F675

  
The temperature sensor U2 needs to be located next to the item being monitored. As the temperature increases the motor duty cycle will increase. D1 and R2 are optical components, they only need to be installed for a visual indication of the current duty cycle. Q1 is a 2N4001 NPN transistor. Resistors are all 1/4 Watt. D1 is a blue LED.
PWM fan controller with PIC 12F675 - schematic




Leave Comment

characters left:

New Circuits

.