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. 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.
Electronic Doorbell with Counter Circuit Diagram
![Electronic Doorbell with Counter Circuit Diagram Electronic Doorbell with Counter Circuit Diagram](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeWT42oHod6hjaVZsRpb9hNuDbkC46GT3R2f-A4RfVNS1g2MmwDoBQcaTnuZGGDLtz3h-387GrK2OKOOG7BdpuxwiIYH-AKqkJA-jtOwQq7XdxmjStLHrpLRhXtI_Yz0aaT86IV-R_QC0t/s640/Electronic+Doorbell+with+Counter.gif)
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