In this lesson, we will show how to use the IR control/receiver to control a DC motor. We use the OSOYOO UNO as the MCU board here, and the Osoyoo Model X motor driver is based on the L298N chip, if you plan on working with robots or just building things that move you’ll eventually need to learn how to control a DC motor. The Osoyoo Model X motor driver module is a simple way to achieve that.
Arduino IDE(version 1.6.8 or later)
Arduino library: IRremote.h
Connect the Uno board, battery box, Voltage Meter and OSOYOO MODEL X motor dirver module according below connection diagram:
Connect the OSOYOO UNO and OSOYOO MODEL X motor driver module as below:
Uno R3 Board | OSOYOO MODEL X motor driver module |
D2 | IN1 |
D4 | IN2 |
D5 | ENA |
D6 | ENB |
Connect the S pin in IR receiver to D3 pin in UNO board, GND to GND, VCC to 5V, as the following photo :
After above operations are completed, connect the Arduino board to your computer using the USB cable. The green power LED (labelled PWR) should go on.Open the Arduino IDE and choose corresponding board type and port type for you project. Then load up the following sketch onto your Arduino.
#include <IRremote.h> #define IN1 2 //K1、K2 motor direction #define IN2 4 //K1、K2 motor direction #define ENA 5 // Needs to be a PWM pin to be able to control motor speed ENA #define ENB 6 // Needs to be a PWM pin to be able to control motor speed ENA #define IRPIN 3 //IR receiver Signal pin connect to Arduino pin 4 #define IR_ADVANCE 0x00FF18E7 //code from IR controller "▲" button #define IR_BACK 0x00FF4AB5 //code from IR controller "▼" button enum DN { GO_ADVANCE, //go ahead GO_BACK,//go back DEF }Drive_Num=DEF; IRrecv IR(IRPIN); // IRrecv object IR get code from IR remoter decode_results IRresults; bool stopFlag = true;//set stop flag bool JogFlag = false; uint16_t JogTimeCnt = 0; uint32_t JogTime=0; /*motor control*/ void go_back(int t) //motor rotate clockwise -->robot go ahead { digitalWrite(IN1, LOW); digitalWrite(IN2, HIGH); delay(t); } void go_ahead(int t) //motor rotate counterclockwise -->robot go back { digitalWrite(IN1, HIGH); digitalWrite(IN2, LOW); delay(t); } void go_stop() //motor brake -->robot stop { digitalWrite(IN1, LOW); digitalWrite(IN2, LOW); } /*set motor speed */ void set_motorspeed(int lspeed,int rspeed) //change motor speed { analogWrite(ENA,lspeed);//lspeed:0-255 analogWrite(ENB,rspeed);//rspeed:0-255 } /**************detect IR code***************/ void do_IR_Tick() { if(IR.decode(&IRresults)) { if(IRresults.value==IR_ADVANCE) { Drive_Num=GO_ADVANCE; } else if(IRresults.value==IR_BACK) { Drive_Num=GO_BACK; } IRresults.value = 0; IR.resume(); } } /**************car control**************/ void do_Drive_Tick() { switch (Drive_Num) { case GO_ADVANCE: set_motorspeed(255,255);go_ahead(20);JogFlag = true;JogTimeCnt = 3;JogTime=millis();break;//if GO_ADVANCE code is detected, then go advance case GO_BACK: set_motorspeed(255,255);go_back(20);JogFlag = true;JogTimeCnt = 1;JogTime=millis();break;//if GO_BACK code is detected, then backward default:break; } Drive_Num=DEF; //keep current moving mode for 100 millis seconds if(millis()-JogTime>=100) { JogTime=millis(); if(JogFlag == true) { stopFlag = false; if(JogTimeCnt <= 0) { JogFlag = false; stopFlag = true; } JogTimeCnt--; } if(stopFlag == true) { JogTimeCnt=0; go_stop(); } } } void setup() { /******L298N******/ pinMode(IN1, OUTPUT); pinMode(IN2, OUTPUT); pinMode(ENA, OUTPUT); pinMode(ENB, OUTPUT); pinMode(IRPIN, INPUT); digitalWrite(IRPIN, HIGH); IR.enableIRIn(); } void loop() { do_IR_Tick(); do_Drive_Tick(); }
A few seconds after the upload finishes, pull out the USB cable, put the 18650 batteries into the battery box, then power the OSOYOO UNO by the DC power supply head.
DownLoad Url osoyoo.com