This circuit was found in a 1967 US documentation. It shows how to build a gain control by digital signals. The circuit can be used as a shield. FET can be a modern equivalent.
The purpose of this circuit is to detect the movement of a person by the changes in light that...
This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4...
This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in...