Modulated Crystal (CB7931E)

This circuit allows modulating the signal generated by a crystal oscillator. The circuit is from the 80s RCA linear integrated manual.

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Pulse Doubler (CB11844E)
This circuit doubles the pulse rate produced by a digital TTL circuit. The circuit is from a 1976...
Alarm with Shutdown (CB24375E)
This alarm with automatic shutoff was found in the April 1975 Radio Electronics magazine. The...
12 V to 110 V x 60 Hz Inverter (CB13913E)
This 12 V to 110 V inverter with 100 W was found in a 1977 Signetics manual. The transformer must...