This benchtop power supply with various output voltages from 1.5 to 12 V was found in Radio Electronics magazine from August 1960. The circuit uses power transistors of the time.
Found in an Electronic Design from the 90s, this circuit uses high voltage operationals of the...
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
The circuit shown in the figure uses two of the four operational amplifiers found on the LM324...