Synchronized Triac Switch (CB26127E)

This zero-crossing circuit was found in the 1989 Radio Electronics Experimenter. The Triac must be controlled according to the load.

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Microphone Preamplifier (CB26214E)
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Surge Protector (CB18721E)
This circuit acts on a relay disconnecting the load when the input voltage exceeds the set limit....
Transistor MW Transmitter (CB19090E)
This experimental short-range transmitter came out in a 1972 publication and was designed to...