How to make a case for motor RPM increase by 10

aen_56 · July 6, 2022, 4:23pm

How do i make a case where the RPM (defined as S1 and S2 for the 2 motors) of the motors increases by 10 like in the code

jremington · July 6, 2022, 4:25pm

Please edit your post to remove the image, and post the code as text, using code tags.

Always post all the code.

aen_56 · July 6, 2022, 4:27pm

calm

int M1_FW = 7;
int M1_BW = 6;
int M2_FW = 5;
int M2_BW = 4;
int buzz = 2;

int echo = 12;
int trig = 11;

char data = 'x';
boolean c = Serial.available();

void setup() {
pinMode(M1_FW, OUTPUT);
pinMode(M1_BW, OUTPUT);
pinMode(M2_FW, OUTPUT);
pinMode(M2_BW, OUTPUT);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(buzz, OUTPUT);
Serial.begin(9600);
c = 0;
}

void loop() {
long duration, distance;
digitalWrite(trig, HIGH);
delayMicroseconds(1000);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
distance = (duration/2)/29.1;
boolean state1 = (distance <= 6);
boolean state2 = (distance > 6);

boolean s = (distance <= 6);

if (s==true) {

digitalWrite(M1_FW, LOW);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, LOW);
digitalWrite(M2_BW, LOW);
}
else
{
if(c > 0){
if( s == true)
data = 's';
switch(data) {
case 'a' :{
digitalWrite(M1_FW, HIGH);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, HIGH);
digitalWrite(M2_BW, LOW);break;

  }
  case 'b' :{
    digitalWrite(M1_FW, HIGH);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'c' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, HIGH);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'd' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0;break;
  }
  case 'e' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, HIGH);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, HIGH);break;
  }
  case 's' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0; break;
  }
  default: break;
}     
}

}

if(Serial.available() > 0){ // Checks whether data is comming from the serial port
c = 1;
data = Serial.read();// Reads the data from the serial port
char old_data = data;
if( s == true)
data = 's';
else
data = old_data;
switch(data) {
case 'a' :{
digitalWrite(M1_FW, HIGH);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, HIGH);
digitalWrite(M2_BW, LOW);break;

  }
  case 'b' :{
    digitalWrite(M1_FW, HIGH);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'c' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, HIGH);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'd' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0;break;
  }
  case 'e' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, HIGH);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, HIGH);break;
  }
  case 's' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0; break;
  }
  default: break;
}

}

jremington · July 6, 2022, 4:28pm

Thanks, now add the code tags.

Instructions are given in the "How to get the best out of this forum" post.

anon73444976 · July 6, 2022, 4:35pm

Why three times?

Please remember to use code tags when posting code.

How many characters do you expect to be available before you've initialise the serial interface?

aen_56 · July 6, 2022, 4:38pm

'
int M1_FW = 7;
int M1_BW = 6;
int M2_FW = 5;
int M2_BW = 4;
int buzz = 2;
int echo = 12;
int trig = 11;
char data = 'x';
boolean c = Serial.available();
void setup() {
pinMode(M1_FW, OUTPUT);
pinMode(M1_BW, OUTPUT);
pinMode(M2_FW, OUTPUT);
pinMode(M2_BW, OUTPUT);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(buzz, OUTPUT);
Serial.begin(9600);
c = 0;
}
void loop() {
long duration, distance;
digitalWrite(trig, HIGH);
delayMicroseconds(1000);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
distance = (duration/2)/29.1;
boolean state1 = (distance <= 6);
boolean state2 = (distance > 6);
boolean s = (distance <= 6);
if (s==true) {
digitalWrite(M1_FW, LOW);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, LOW);
digitalWrite(M2_BW, LOW);
}
else
{
if(c > 0){
if( s == true)
data = 's';
switch(data) {
case 'a' :{
digitalWrite(M1_FW, HIGH);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, HIGH);
digitalWrite(M2_BW, LOW);break;

  }
  case 'b' :{
    digitalWrite(M1_FW, HIGH);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'c' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, HIGH);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'd' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0;break;
  }
  case 'e' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, HIGH);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, HIGH);break;
  }
  case 's' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0; break;
  }
  default: break;
}     
}

}

'
if(Serial.available() > 0){ // Checks whether data is comming from the serial port
c = 1;
data = Serial.read();// Reads the data from the serial port
char old_data = data;
if( s == true)
data = 's';
else
data = old_data;
switch(data) {
case 'a' :{
digitalWrite(M1_FW, HIGH);
digitalWrite(M1_BW, LOW);
digitalWrite(M2_FW, HIGH);
digitalWrite(M2_BW, LOW);break;

  }
  case 'b' :{
    digitalWrite(M1_FW, HIGH);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'c' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, HIGH);
    digitalWrite(M2_BW, LOW);break;
  }
  case 'd' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0;break;
  }
  case 'e' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, HIGH);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, HIGH);break;
  }
  case 's' :{
    digitalWrite(M1_FW, LOW);
    digitalWrite(M1_BW, LOW);
    digitalWrite(M2_FW, LOW);
    digitalWrite(M2_BW, LOW);
    c = 0; break;
  }
  default: break;
}

}

Not sure if this works

anon73444976 · July 6, 2022, 4:40pm

It looks like the same code, still missing code tags.

aen_56 · July 6, 2022, 4:43pm

not too sure what that means, am new to this.

how do i set the current RPM as a variable and add 10 onto it given a certain input.

jremington · July 6, 2022, 4:49pm

Motor RPM depends on the applied voltage and the load on the motor shaft, so it can't be arbitrarily set to a particular value by analogWrite(). Also, the motor response to analogWrite() is not linear, which means doubling the analogWrite value does not double the RPMs.

In order to control RPM accurately, you need to measure it. Most people use shaft encoders to measure it and a feedback loop to set it.

system · January 2, 2023, 4:49pm

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.

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How to make a case for motor RPM increase by 10

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