This circuit can be used as a shield for touch control. The circuit can use any common FET like the BF245 and should never be powered by a source without a transformer.
This circuit was obtained from an American documentation from the 60s. The circuit makes use of...
This circuit was obtained from an English publication from the 70's. The circuit is still current for...
When a voice signal enters this circuit, the volume of the music being played automatically...