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2014-03-21T07:58:28Z

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{{Language|第四十一课--Microduino 直流电机正反转}}
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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==
[[File:第四十一课-Microduino直流电机正反转原理图.jpg|600px|center|thumb]]

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==
<source lang="cpp">

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
}

</source>

==Debug==
Step 1：Copy the code to IDE and compile it

Step 2：Set up circuit, as follows：
[[File:第四十一课-Microduino直流电机正反转连接图.jpg|600px|center|thumb]]

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

Lesson 41--Microduino Dc Motor Rotation Control - 版本历史

Pkj：Created page with "{{Language|第四十一课--Microduino 直流电机正反转}} {| style="width: 800px;" |- | ==Objective== This tutorial will teach you use a simple way to achieve the forward..."