Found on a 1969 EDN this circuit switches a current from a digital control signal. The impedance of the circuit ON is approximately 10 ohms. Modern equivalent transistors may be used.
This complex circuit was found in the 1993 edition of the Electronics Experimenter's Handbook. Most of...
Using transistors at the time, this circuit was found in a 1970s documentation. Transistors support...
This simple experimental circuit drives LEDs in sequence. Only transistors are used, and the power...