This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset current setting. The configuration can be adapted to operate with modern equivalent components.
We find this circuit in an American 1980s documentation. The unijunction transistor may be the...
We found this circuit in an Electronics World of 1967. The components are of the time and...
This simple circuit can be used to power a simple communication system using ordinary telephones....