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 filter is intended for 60 Hz noise suppression in amplifiers. We found it in American...
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
This amplifier is powered by a 9 V source. We found the circuit in a 1964 documentation. The...