I am using a timer circuit to control a wiper motor on a car. The timer
circuit uses a NE555 in monostable mode to drive a pair of miniature
electromechanical relays mounted on the PCB in parallel. One relay is
Normally Open, which controls the wiper motor run mode, and one is Normally
Closed, which controls the wiper motor parking mode (i.e., returns the wipers
to "parked" position when the run mode goes to OFF). Each relay, therefore
must control about a 7amp 12VDC load. But mechanical relays are too loud; the
clicking is very distracting.  I would like to replace them with something
quieter. I thought maybe reed relays could be substituted but these seem
generally to be designed for much lower current loads. Is there an FET circuit
I could put on the output of the timer circuit to take the place of the
relays?

  I would appreciate any help. thanks.

  Scott Hieber

S. Hieber

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