Telephone: Voice Changer

Learn how a telephone works. Comes complete with all parts and manual. Has the latest features such as automatic redial, mute and flashing neon lights when ringing. The clear plastic case allows you to show your friends your accomplishment.

This mini-VOX - voice operated relay - is based on a circuit published in Silicon Chip, 9/1994, p31.

Features a telephone ring generators, phone line in-use indicators and an audio interface circuit.

Electronic circuit that connects to phone line and produces and flashing LED and audible sound when there is an incoming call.

No electrical connection to the telephone is required, attach a suction cup to the hand set an turn on the amplifier. This project permits group listening to phone calls. You can also use it to monitor any other oscillating electrical field. Dual IC's pro