The main principle of this circuit is to control appliances like light and fan using DTMF technology. By using this technology, One can control home appliances from anywhere. Generally, appliances ...
The project utilizes a NTE1690 DTMF dialer chip and a PIC16F690 microcontroller in order to create a dialer box that connects to the phone and can be used to dial and store phone numbers, pins, and ...
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