5 V reference LT1027 (CB14595E)

This circuit is from the 1993 Linear Technology Applications Databook. The component is uncommon today.

Simple Rhythmic LED (CB16371E)
To make a single LED flash in time with your amplifier's music, we have the circuit given below. The...
High torque motor control (CB20782E)
Found in documentation from the 70s, this circuit makes use of SCRs of the time. Modern equivalent types...
Push pull receiver (CB22275E)
This circuit from the 60's uses germanium transistors of the time. Listening is done on high...