This circuit with 1W of output was found in a Mullard manual from 1960. The consumption is low and germanium transistors of the time are used.
Indicated on an 80's Radio Electronics, this circuit provides at its output a voltage that is the...
This circuit was found in a Philips documentation from 1970. The components are of the time,...
The integrated circuit used in this application is not currently common and the sensor can be any...