I am using a timer circuit to control an 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 relays is
Normally Open, which controls the wiper run mode, and one is Normally Closed,
which controls the wiper 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. 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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