PWM fan controller with PIC 12F675

Posted on Apr 19, 2012

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
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Voltage-Level Indicator
Battery Tester Circuit
Video Amplifier
4081 AND gates
ULN2429 liquid detector circuit diagram electronic project
A low noise four phase crystal oscillator
Morse Code Bicycle Safety Blinker
Constituted by the PGA103 programmable gain instrumentation amplifier circuit diagram
Buffer amplifier
FET high input impedance wideband amplifiers