Found in a 1969 EEE, this circuit is based on an operational amplifier of the time and on old type MOSFETs. The components support modern equivalents.
This old radio with a germanium transistor was obtained from an English documentation from the...
Found in an old American publication, this article is suitable for incandescent lamps. SCRs can be of...
We found this circuit in 1967 General Electric documentation. SCRs can be replaced by current...