Simple Doorbell with Counter

This circuit is a doorbell with counter, that means it counts how many times the bell is triggered. It uses a chip synthesizer sound, the HT-2811 ms nothing prevents you from using another device sound generator.

Simple Doorbell with Counter Circuit Diagram:

Simple Doorbell with Counter Circuit Diagram
The HT-2811 reproduces the sound of a "ding-dong" doorbell. Besides this ic, the circuit includes a CMOS 4026 and Display Driver IC which counts the total number of visitors.

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