Hey guys,
I need to switch 12V car relay with PWM signal. The circuit should switch the relay ON when there is PWM signal available (PWM (amplitude 12V) in wire -> relay ON, NO PWM -> relay OFF). Can you help me and send such circuit scheme? It’d help a lot.
(My idea: To flatten PWM with capacitor and connect it to MOSFET switching the relay. And since MOSFET doesn’t drain current, the Vgs voltage would be stable 12V, if PWM was available. Otherwise capacitor would be discharged through pull-down resistor and MOSFET switched OFF)
I need to switch 12V car relay with PWM signal. The circuit should switch the relay ON when there is PWM signal available (PWM (amplitude 12V) in wire -> relay ON, NO PWM -> relay OFF). Can you help me and send such circuit scheme? It’d help a lot.
(My idea: To flatten PWM with capacitor and connect it to MOSFET switching the relay. And since MOSFET doesn’t drain current, the Vgs voltage would be stable 12V, if PWM was available. Otherwise capacitor would be discharged through pull-down resistor and MOSFET switched OFF)