Telephone

Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio. The frequency can be tuned from 88 to about 94Mhz and the range is about 200 feet. It is extremely easy to build and is therefore a good, useful [...]

Here is a teleremote circuit which enables switching on and off of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote controls. The circuit described here can be used to switch up to nine appliances (corresponding to the digits 1 through [...]

Caller ID circuit displays name and a telephone number of the person that is calling you. Information is decoded using MT8870 DTMF decoder and PIC16F628 microchip and is displayed on 2×16 LCD.
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