Remote potentiometer (CB8326E)

This circuit came out in a 60s RCA documentation. The circuit uses common lamps and LDRs but can be implemented with LEDs.

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Logic Control with Relays (CB4182E)
This two-relay circuit gives drive logic that is clear when analyzing the circuit. In the original...
100 kHz Clock (CB6465E)
This circuit is from a Ferranti publication of 1968. The circuit generates a signal according to the...
Diode Test with Oscilloscope (CB4160E)
The circuit shown enables dynamic diode testing with an oscilloscope. We found this configuration in a...