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 for controlling AC loads in the power grid was found in a 1967 Electronics World. The load...
We found this alarm in an English publication from 1978. Although the original power supply is 3...
This circuit was obtained from an English magazine from 1977. It is a toy musical instrument that...