L293B is known as push pull four channel drivers. Robomaz have used this driver to run their motors. The detail about this driver was explained below.
- Inhibit Facility
- High noise immunity
- Separate logic supply
- Over temperature protection
- Output current 1A per channel peak output current 2A per channel (On repetitive)
The L293B are quad push-pull drivers. It’s capable of delivering output currents to 1A per channel. Each channel is controlled by a TTL-compatible logic input and each pair of drivers (a full bridge) is equipped with an inhibit input which turns off all four transistors. A separate supply input is provided for the logic so that it may be run off a lower voltage to reduce dissipation. The L293B are packaging in 16 and20-pin plastic DIPs respectively. Both use the four centers pins to conduct heat to the printed circuit board.From the picture, it is one of the H-bridge driver. Transistor 2N3004 had been used to make motor moving forward and reverse.