We found this touch control on a Popular Electronics from 1970. The circuit makes use of an integrated of the time. It can be adapted to use modern equivalent components.
We find in a Radio Electronics of the 90s this low noise amplifier that makes use of an uncommon...
This circuit was found in the January 1989 issue of Radio Electronics magazine. The circuit sends...
This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and...