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Automatic Doorbell with Detection Circuit by shamikpurkayastha is a document available to read on EtoBox.
What is Automatic Doorbell with Detection Circuit about?
The document discusses an automatic doorbell circuit project that uses ultrasonic transmitter and receiver modules to detect when a person is near the front door and trigger the doorbell. It provides a diagram of the circuit and explains that the transmitter operates at 40 kHz to send ultrasonic waves while the receiver receives the same frequency to detect objects within a range of 1-2 meters and trigger the buzzer doorbell. Additional details are given on assembling the compact circuit and providing a reg
- Author
- shamikpurkayastha
- Language
- EN