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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Limiter Amplifier (CB12468E)
This amplifier for effects on musical instruments can be mounted with BC549 transistors. The...
Proximity sensor (CB9570E)
This circuit was found in documentation from the 1980s. The circuit uses several components of the...
Simple Optical Modulator (CB14680E)
The presented circuit can use an equivalent transistor like the BC548. The configuration, which [is...