Found in the October 1979 Radio Electronics magazine, the purpose of this circuit is to monitor the coolant level in a car's radiator. The circuit is based on the LM1830.
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...