One hour timer circuit with the end switch

Published:2011/6/19 22:45:00 Author:TaoXi | Keyword: One hour, timer, end switch | From:SeekIC

The one hour timer circuit with the end switch uses the LM122 timer and the hand control switch, the LM122 timer and the hand control switch can form the one hour timer which has the start, reset and stop functions. Once the timing begins, the S1 will not play any functions. You can pull the S2 up to finish the rated cycle, the output state will change; if you pull the S2 down, the timing capacitor voltage will be back to 0V, the output state will not change, it releases the S2 to start the new timing cycle.



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