PWM signal from four wire fan

Thread Starter

sumit123

Joined Oct 28, 2013
11
I am trying to design a circuit that read the PWM signal from four wire fan & indicate us in a form of Led or sound ,when fan stop the working or if the fan motor not working.

Anybody help us with the circuit diagram.
 

MaxHeadRoom

Joined Jul 18, 2013
21,246
Mitsubishi use these 3 wire type of fans on their CNC equipment, the third wire has to indicate a high, (fan running) in order to energize the system.
Max.
 
Top