This circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit includes a powerful pulsating siren. It is activated by courtesy light switches and other sensors.
This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and...
This configurable CMOS configuration for frequencies up to a few megahertz was obtained in an...
The purpose of this 2005 circuit is to demonstrate in a very simple way the principle of operation of a...