Controlador de velocidad de temperatura PWM de 12 V 4 cables para ventilador de PC ventilador de computadora reducir el ruido

The actual speed of the fan is affected by the design of the fan. Can't adjust the speed of 2-3 wire ordinary fan. PWM signal mode: 25KHZ Vpp=5V. Raspberry Pi. Reverse mode: used for conventional reverse timing fan, PWM reverse change, full output is 0.

eBay