Locked Triac (CB7238E)

This is a circuit found in a 1970's Radio Electronics. The circuit works with virtually any triac that must match the load.

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Sound Voltmeter (CB25975E)
This circuit was found in the September 1996 issue of Electronics Now magazine. The sound provided has...
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This circuit was found in a Hands On Electronics from the 80's. The circuit emits an audible alert...
Alarm with NO and NC Sensors (CB4806E)
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...