Lab 8 - Bi-directional Motor Control

1/17/19

Transistors are great because you can have enough current to turn on a motor. A Circuit was designed using a tiny relay IC in which current will go into the motor and make it spin, but also have current come into the motor on its other lead to make it go the other direction. Relay is a DPDT (Double Pole, Double Throw). 

DPDT Relay circuit Schematic

H Bridge Schematic

A motor can be also controlled using a H bridge configuration. Instead of using a DPDT relay to control, the circuit, we can use an Arduino to control two transistors to allow dc current to flow in one direction, and two other transistors to have the current flow in a different path so it goes in the other way into the motor. 

DPDT Relay circuit

                           

H Bridge Circuit