Found in a Hands On Electronics from the 80's this circuit allows the reading of low resistances in a common multimeter. The circuit consists of a constant current source.
This MOSFET circuit for microphone applications was found in the December 1969 issue of Radio...
This operational amplifier circuit with power output using complementary transistors was found in a...
This circuit is from a publication of the 70s, but it can be easily assembled with the BC548. The...