AC Tachometer (CB9353E)

This circuit was found in a 1969 EEE. It detects when there is a phase failure in a circuit using an inductive sensor.

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DC Motor Control (CB15610E)
DC motors of 6 to 12 volts and currents of up to 2 amps can be controlled with this circuit. The...
Capacitive Load Amplifier (CB4903E)
We found this circuit in an old American documentation. The circuit can be applied to modern...
Three Tone Oscillator (CB418)
This circuit uses one UJT (Unijunction Transistor) to produce three different tones in a...