This circuit supplies 5 V from two AA batteries. The output current is 4 mA, resulting in an 11 mA input current from the batteries. The circuit is from an old EDN.
This circuit is from the Motorola Linear Databook of 1990. The values of the components depend on the...
This trigger circuit was found in an American documentation from the 1980s. The amplifiers used...
This circuit for ceramic cartridges was found in the March 1993 issue of Electronics Now magazine. Q1...