This circuit makes use of a specific 80's component and was found in an American manual of the time. A matrix keyboard allows you to select one of several music programs.
This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two...
We find this circuit in an American 1980s documentation. The unijunction transistor may be the...
May 2017 - Mouser Electronics supplies a wide range of sources for LEDs from Mean Well with inputs for...