LT123 Low Voltage Linear Regulator (CB4399E)

The circuit presented is from the 1993 Linear Technology Applications. The components used were common at the time.

Automatic security flasher (CB9783E)
Found in documentation from the 1980s, this circuit can have several adaptations to use modern...
3-Transistor Commercial Transistor Radio (CB18381E)
This receiver for listening to the TR-23 phone was manufactured in Japan in the 1960s. The circuit is...
Photo Oscillator (CB512)
The frequency of the tone produced by this oscillator depends on the amount of light falling onto...