Lesson 41--Microduino Dc Motor Rotation Control

Language	English

Objective This tutorial will teach you use a simple way to achieve the forward and backward rotation of a dc motor. Equipment Microduino-Core Microduino-FT232R Other equipment Breadboard Jumper one box Breadboard one piece DC motor one USB cable one Schematic Note：This isn't one of the most safe method to control the motor, because each I/O pin only can carry 40mA current. If as a practical application, recommend using H-Bridge motor driver board. Program int motorPin1 = 5; // Motor's one end connects to digital pin 5 int motorPin2 = 6; // The other end connects to digital pin 6 void setup() { //Initialization, set these two pins as output pinMode(motorPin1, OUTPUT); pinMode(motorPin2, OUTPUT); } void loop() { rotateLeft(150, 500);//Left rotate, speed=150, lasts 500ms rotateRight(50, 1000);//Right rotate, speed=50, lasts 1000ms rotateRight(150, 1000);//Right rotate, speed=150, lasts 1000ms rotateRight(200, 1000);//Right rotate, speed=200, lasts 1000ms rotateLeft(255, 500);//Left rotate, speed=255, lasts 500ms rotateRight(10, 1500);//Right rotate, speed=10, lasts 1500ms } //Turn left void rotateLeft(int speedOfRotate, int length){ analogWrite(motorPin1, speedOfRotate); //Use pwm to set the current digitalWrite(motorPin2, LOW); // Set motorPin2 to LOW delay(length); //waits digitalWrite(motorPin1, LOW); // Set motorPin1 to LOW } //Trun right void rotateRight(int speedOfRotate, int length){ analogWrite(motorPin2, speedOfRotate); //Use pwm to set the current digitalWrite(motorPin1, LOW); // Set motorPin1 to LOW delay(length); //waits digitalWrite(motorPin2, LOW); // Set motorPin2 to LOW } //Full speed turn left void rotateLeftFull(int length){ digitalWrite(motorPin1, HIGH); //Set max current digitalWrite(motorPin2, LOW); // Set motorPin2 to LOW delay(length); //waits digitalWrite(motorPin1, LOW); // Set motorPin1 to LOW } //Full speed turn right void rotateRightFull(int length){ digitalWrite(motorPin2, HIGH); //Set max current digitalWrite(motorPin1, LOW); // Set motorPin1 to LOW delay(length); //waits digitalWrite(motorPin2, LOW); // Set motorPin2 to LOW } Debug Step 1：Copy the code to IDE and compile it Step 2：Set up circuit, as follows： Step 3：Run program Step 4：Check the rotation of motor Result Motor will rotate forward and backward with different speed and in circle. Video http://v.youku.com/v_show/id_XNjgyNDgzNzM2.html