MOMENTARY_RELAY_CIRCUIT

Published:2009/6/24 5:33:00 Author:May | From:SeekIC

The charging current of a capacitor can be used if a momentary relay-on circuit is needed Depending fin the relay characteristics，C will vary from 1000 to 4000 μF or so for a 1-s hold time if a 500－Ω relay is used.RD discharges capacitor C to reads，the circuit for the next oPeration The valueshould be high enoughso as notto maintian the relay closure at highest expected supply voltage．



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