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 simple electroscope with bipolar transistors is not the most sensitive, but can detect static...
Figure bellow shows how n flip-flops can be associated to perform a shift register. Data is...
This circuit was suggested by Analog Devices in 1980s documentation. The circuit has a grounded...