This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply voltage of a CMOS load.
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...