Full wave SCR dimmer (CB7201E)

Found in a 1967 RCA manual, this circuit uses components from the era that can be replaced by modern equivalents. The circuit is for resistive loads.

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Active Audio Filter (CB12228E)
This circuit compensates for losses in pre-amplified audio or tone control stages. The circuit can use...
Simple Alarm (CB26246E)
Found in the Encyclopedia of Electronic Circuits volume 5 from 1995, this circuit uses a...
Resistance Bridge (CB3911E)
This is a bridge for the measurement of low value resistances and high values too. The circuit...