Using the 723 integrated circuit, this power supply has the voltage determined by R2 and R3, which can be changed. The circuit is from a Radio Electronics magazine from July 1971.
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...
An audio amplifier of good power, and great sensitivity; a simple tuning step and a detecting...
This automotive circuit was found in the June 1997 issue of Electronis now magazine. The circuit uses...