Sunday, August 24, 2014
Electronic Doorbell with Counter Wiring diagram Schematic
This schema 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 schema includes a CMOS 4026 and Display Driver IC which counts the total number of visitors.
Electronic Doorbell with Counter Circuit Diagram
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