This test circuit was found in the PE Hobbyst Handbook in a 1990s edition. The circuit tests the battery under load. The load, as the battery is selected by the switch.
This useful power supply can provide voltages from 0 to 12 V with currents up to 2 A, set in...
This circuit of old documentation can be implemented with modern operational amplifiers. The...
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....