This circuit was found in a 1945 publication. The circuit was stated to be part of a walk talkie. Note that, as it is a portable assembly, it was powered by batteries. The jack was for microphone insertion.
This circuit keeps the courtesy lights of a car on for a while after the doors are closed. The...
This circuit was obtained in an Electronics Now from the 90s. The circuit uses operational...
This circuit was originally designed to measure the gain of two-door RF MOSFETs as indicated by...