This step-down regulator was found in the December 1985 issue of Radio Electronics magazine. The circuit has an input voltage of 25V.
This circuit is from 1968 documentation. We can assemble it with more modern components such as a...
Found in a 90s Silicon Chip documentation this circuit is intended to protect a speaker system in...
The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from...