Found in a 303 Circuits from the 90's this circuit can use the lowest current range of a common multimeter. The circuit can measure currents as low as 100 pA.
The voltage of 13.2 V is closer than what we find in a car battery than 12 V. Thus, a 13.2 V zener...
This 2-transistor circuit was found in the March 1958 Radio Electronics magazine. The coil...
This hybrid power supply circuit was found in the August 1997 issue of Electronics Now magazine. The...