Greetings everyone,
I'm new to this, my question maybe be silly. I'm making a very basic kiddish plotter using salvaged components from an old inkjet printer. I uploaded a simple code to plot a square using equal delays for the x and the y motor, which worked perfectly fine. After adding a couple of things to code including PWM the IR receiver starts receiving trash values.
Everything works perfectly fine when I remove the analogWrite() that controls the motor driver's speed. I've been struggling with this for a week, any help is appreciated.
Here's my code-
#include <Servo.h>
#include <IRremote.h>
int IRpow=A3;
int RECV_PIN = A5;
int IRgnd=A4;
const int motxa=3;
const int motxb=4;
const int motya=5;
const int motyb=6;
int speedpin=11;
Servo myservo;
int speedo;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup() {
speedo=400;
// put your setup code here, to run once:
myservo.attach(9);
pinMode(motxa, OUTPUT);
pinMode(motxb, OUTPUT);
pinMode(motya, OUTPUT);
pinMode(motyb, OUTPUT);
pinMode(speedpin, OUTPUT);
pinMode(A3, OUTPUT);
digitalWrite(A3, HIGH);
pinMode(A4, OUTPUT);
digitalWrite(A4, LOW);
irrecv.enableIRIn();
Serial.begin(9600);
}
void loop() {
analogWrite(speedpin, speedo); //using PWM to control motor driver's speed
// put your main code here, to run repeatedly:
if (irrecv.decode(&results)) { Serial.println(results.value, HEX);
if(results.value==0xE0E040BF){//move paper down
down();
}
if(results.value==0xE0E040BF){//move paper up
up();
}
if(results.value==0xE0E0A659){//move chassis left
left();
}
if(results.value==0xE0E046B9){//move chassis right
right();
}
if(results.value==0xE0E008F7){engage plotter pen
pendown();
}
if(results.value==0xE0E048B7){// lift up the plotter pen
penup();
}
if(results.value==0xE0E048B7){
stoppa();
}if(results.value==0xE0E0D02F){//reduce speed
if(speedo>300)
speedo=speedo-100;
}if(results.value==0xE0E0E01F){//increase speed
if(speedo<300)
speedo=speedo+100;
}
irrecv.resume(); // Receive the next value
}
}
void left(){
digitalWrite(motxa, HIGH);
digitalWrite(motxb, LOW);
}
void right(){
digitalWrite(motxb, HIGH);
digitalWrite(motxa, LOW);
}
void stoppa(){
digitalWrite(motxb, LOW);
digitalWrite(motxa, LOW);
digitalWrite(motya, LOW);
digitalWrite(motyb, LOW);
}
void up(){
digitalWrite(motya, HIGH);
digitalWrite(motyb, LOW);
}
void down(){
digitalWrite(motyb, HIGH);
digitalWrite(motya, LOW);
}
void pendown(){
myservo.write(30);
}
void penup(){
myservo.write(90);
}
Components used-
A Servo, motor driver, Arduino, motors, TSOP 1738 IR receiver.
Here's a pic of the project so far-
