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 interesting circuit was found in an 80's Electronic Engineering. The circuit has a 50% active...
This is a rotation direction control for a small motor up to about 2 A with the indicated...
This circuit is suggested by Motorola and consists of a voltage reference based on an MC1403. The...