This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and was found in an English publication. The sensor is semiconductor type.
This circuit was found in the power semiconductor manual of the 1980s ON Semiconductor. The...
This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time...
August 2016 – It can be obtained from Mouser Electronics the new modules Littelfuse for surge...