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Contactless Telephone Ringer

Contactless Telephone Ringer

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publish time: 2020-10-26
Circuit Everyday

The simple circuit, which is fully transistorized, is designed as a contactless telephone ringer that can indicate incoming phone calls to remote sites in a building, such as a kitchen or bedroom.It is achieved by winding five or more turns of short wire insulation around one wire of the dual telephone cable.

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