Common collector stage (CB22226E)

This circuit employs an old germanium transistor. The circuit is from a 1950s publication and uses RC coupling.

Ant transmitter (CB21870E)
This small FM spy transmitter uses three transistors with an RF amplification stage. We found it...
Temperature control (CB10168E)
This circuit makes use of a constant current source to control the temperature of a direct current...
High Current Timing Circuit (CB24442E)
This circuit with a voltage comparator is delayed by the capacitor. The circuit drives a power...