SCR Full wave dimmer (CB20674E)

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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Capacitance meter (CB22163E)
Found in an English documentation from 1989, this circuit uses components common today. The...
Simple capacitor test (CB7060E)
The LED frequency flashes depends on the value of the capacitor tested according to the table. We...
Hartley crystal oscillator (CB7541E)
Found in a Popular Electronics from the 90s, this circuit generates a signal that depends on the...