Control DC motor

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 compile 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. 文件:ProcessingDCMotorResult.jpg 600px Video