I have a circuit that uses a power MOSFET to control the state of a water valve. The valve is hit with an initial 50 VDC pulse (1.5 ms) to ensure that it opens, and then the voltage is dropped to 10 VDC to maintain the valve open.
I would like to use the same MOSFET output that controls the valve to control a 12 VDC, 41 mA LED lamp (that would show the status of the valve). I am looking for the best way to protect the LED lamp from the initial 50 VDC pulse. Would it be okay to simply use a resistor and a zener diode?
Any suggestions would be greatly appreciated.
I would like to use the same MOSFET output that controls the valve to control a 12 VDC, 41 mA LED lamp (that would show the status of the valve). I am looking for the best way to protect the LED lamp from the initial 50 VDC pulse. Would it be okay to simply use a resistor and a zener diode?
Any suggestions would be greatly appreciated.