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Simple Telephone Central (16F876)

2015-01-10 03:54  
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This article briefly describes the Simple Telephone Central (16F876). This principle is easy to understand, but also very practical. Depth understanding of circuit elements, you can better grasp this principle. In this circuit, you can learn about and purchase these components: 16F876.

All responsibility is belong to user. Schematic and code is underGNUpublic licence.Figure:1 Circuit diagram

Figure 1 Circuit diagram


1) System contains 1 subscriber and 1 central
2) Central cannot call.
3) When subscriber hangs up, Central rings.
4) When central answers, ringing stops.
5) Conversation ends when one side closes the phone.

For simplicity you may use an old AT computer power supply which includes
12v and 5v. Have fun…..



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