Small capacitance and long duration timer circuit

Published:2011/7/12 9:46:00 Author:John | Keyword: timer | From:SeekIC

Small capacitance and long duration timer circuit is as shown. When a few hours of delay is needed, two dual-input precision level detectors CA3098 can be used. It is not necessary to use the high-capacity and low-leakage capacitor. If Rc = 22MΩ, RD = 100KΩ, 4 hours’ delay timer can be achieved as long as the CTK is 16μF.



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