This bidirectional circuit was found in an American documentation from the 80's. The LEDs are common red, and the resistor is calculated according to the formulas next to the diagram.
This circuit, in addition to providing an output that corresponds to the absolute value of the...
Found in American documentation, this circuit uses an automotive ignition coil to generate 20 kV. The...
This power supply was found in a 2000 documentation. It can supply currents from 2 A to 15 V and 1...