This car battery monitor was featured in the January 1988 issue of Radio Electronics magazine. The circuit uses common transistors and has 3 levels of indication made with common LEDs.
This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and...
This circuit is from an Italian magazine Elettronica 2000 of September 1987. It is a pulsator for...
Published in a February 1978 Radio Electronics magazine article, this digital circuit uses some of...