Lesson 41--Microduino Dc Motor Rotation Control

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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