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 shield circuit for lamps and other charges was found in a Popular Electronics from the 90's....
Using the well-known 2N2646 that was popular at the time, this circuit was found in Radio...
We found this circuit in a Popular Electronics of the 90s. The circuit can also be used as a seat...