Electronic Doorbell with Counter

Published:2012/11/29 0:29:00 Author:muriel | Keyword: Electronic Doorbell, Counter | From:SeekIC

This circuit uses a synthesized sound chip from Holtek, the HT-2811. This reproduces the sound of a ding-dong chiming doorbell. Additionally, the circuit includes a CMOS 4026 counter display driver IC to count your visitors.



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