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 a 1976 NASA manual, making use of components of the time. The transistor...
This Linear Technology circuit charges a battery from the energy produced by a wind generator that can...
This 10 A solid state relay was found in a 1980s documentation. It can work as a shield and...