Difference between revisions of "DC Motor Control"

Objective

The course will show you how to use "Processing" to control the speed of the DC motor.

Equipment

• Microduino-Core
• Microduino-FT232R

• Other Hardware Equipment
  • A USB cable
  • A box of jumpers
  • A breadboard
  • A DC motor
  • A potentiometer
  • A resistor of 2.2K Ω
  • A diode
  • A transistor NPN

Schematic

Program

Refer to MicroduinoDCMotorControl

ProcessingDCMotorControl

Debugging

Step 1: Build hardware environment in accord with the schematic, just like this:

Step 2: Here the code we need：

The code of the two ends (Processing and Microduino)

Microduino:

//Send output value to the motor after getting the serial data

 if(Serial.available())//if serial is available
 {
   leitura=Serial.read();//read serial data
   Serial.println(leitura);
   vel=map(leitura,0,255,0,1023);//map
   if(leitura>0)//run motor by leitura
   {
     analogWrite(motorPin,vel);
     delay(1);
   }
   else//stop motor
   {
     analogWrite(motorPin,LOW);
   }
 }

Processing:

//List all the serial ports and get data of the first serial port

 // List all the available serial ports in the output pane.
 // You will need to choose the port that the Wiring board is
 // connected to from this list. The first port in the list is
 // port #0 and the third port in the list is port #2.
 println(Serial.list());
 // Open the port that the Wiring board is connected to (in this case #0)
 // Make sure to open the port at the same speed Wiring is using (9600bps)
 port = new Serial(this, Serial.list()[0], 9600);

//Draw and update

 void draw() 
 {
   background(0);
   update(mouseX/10); 
   println(mouseX);
 }

//Transmit the x-coordinate value of the mouse through the serial port and draw the current value on Processing

 void update(int x) 
 {
   port.write(x);
   stroke(255);  
   line(mouseX, 0, mouseX, 160);   
   text (mouseX, mouseX, 180);
 }

Step 3: Download the code and get it compiled successfully. .

Step 4: Move your mouse around in "Processing" after the system goes well to see speed change of the motor.

Result

A simple speed indicator will be displayed on the screen. The speed of the motor will change along with the change of your mouse on the x-coordinate.

Video