In this National Semiconductor circuit, the output voltage is numerically equal to the square root of the input voltage. The circuit is from the 90s and the components are from the period.
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...