The purpose of this circuit is to monitor the output voltage of a power supply. The under and over voltage indicator was found in the August 1991 Radio Electronics magazine.
We found this circuit in a Hands On Electronics from the 90s. The delay is given by the formulas...
This is one of the many universal motor controls that the reader can find on this website. The...
This experimental short-range transmitter uses a low-impedance microphone, low-impedance phone, or even...