This sensitive circuit for triggering relays was found in an old English publication. It works with alternating signals applied to its input. Transistors are general purpose types.
This power supply with several transistors can supply a current of several amps and a voltage of...
This simple power supply for transistors was found in documentation from the 1940s. The...
We found this circuit in the February 1970 issue of Radio Electronics Magazine. It uses an RCA...