The component used in this circuit is uncommon today, as the circuit was obtained from Motorola's Linear Databook of 1990. The circuit consists of a 5 V x 500 mA switched regulator.
The ZN414 integrated circuit consists of a complete radio from the 1980s. This single receiver...
The circuit shown in the figure uses a programmable unijunction transistor (PUT) of the BRY39 type...
This 1970s RCA circuit can be triggered by light or dark, depending on how the LDR is connected....