This is the traditional H bridge configuration for motors. The circuit is for currents up to 500 mA, but with higher power transistors such as the TIP31 motors up to 2 A can be controlled.
This simple teaching circuit uses 5 transistors in a monophonic organ version whose notes are...
We found this circuit in documentation from the 80s. The circuit is for cars with platinum. The...
This circuit for the medium wave range was published in Radio Electronics in February 1958. The...