Phase Control (CB6562E)

Employing a unijunction and a triac of the era, this 1964 Electronic Design circuit uses a diac to trigger the Triac.

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Perforated card reader (CB8261E)
Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor....
100 kHz to 1 MHz Oscillator (CB12815E)
This circuit can generate signals from 100 kHz to 1 MHz depending on the L1 coil. For the medium...
Switch-Triggered Flip Flop (CB25674E)
This two-transistor circuit was found in the January 1994 issue of Electronics Now. The circuit can...