Arduino iOS Blueprints by Fabrizio Boco

Author:Fabrizio Boco [Boco, Fabrizio]
Language: eng
Format: azw3
Publisher: Packt Publishing
Published: 2015-09-29T16:00:00+00:00

Electronic circuit

A DC motor rotates in one direction when powered up and rotates in the opposite direction when the voltage polarity is inverted.

The following circuit diagrams depict ways to use switches to power the DC motor to invert the voltage polarity and rotation direction. In the following circuit diagram, the motor rotates in the clockwise direction:

While in the second case, it rotates in the anticlockwise direction:

Transistors can replace switches in order to control the direction through electronic signals. A transistor-based circuit that replaces the four switches is called an H-bridge (http://bit.ly/1JBmdrE).

Basically, an H-bridge is a circuit that allows you to control the DC motor direction through two input signals. When the first signal is high and the second one is low, the motor runs in one direction; when the first signal is low and the second one is high, the motor runs in the opposite direction. To control the speed of the motor, we also need a PWM signal (https://www.arduino.cc/en/Tutorial/PWM). The TB6612FBG motor driver includes two H-bridge circuits to power the two motors up to 1A.

The following table, derived from the TB6612FBG datasheet describes how to use the available input signals to control the motor:

Input

Output

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.