Pwn fan controller with temp sensing and button override 12v pc fan 4 pin pwm header to 3 pin fan Electroschematics circuit schematic connector cooling speed electronics
circuit design - 4-wire fan controlled by potentiometer and 555 IC not
Pwn pwm sensing override hackster
Circuit design
Fan pwm pc 12v wire header guide colours match note only may not4 wire pc fan Smoke from motherboard when plugging in fan header.
.
