Hi everyone,
I have a problem occurring with my code, can someone please help me to fix this.
I am using a push button to turn on the motor, and turn off it, but I also want the motor to run at a low speed such as 200 rpm, as well as the problem in my code, I am very new to this stuff, so your help will be appreciated. @jim-p
// declare variables
const int LEDpin = 9;
const int potpin = A0;
int pot;
int speed;
void setup(){
// don't need to use pinMode
// with analogRead and analogWrite
}
void loop(){
//read button state
state = digitalRead(butpin);
// check if button is pressed
if(state ==HIGH){ // button not pressed
digitalWrite(LEDpin,LOW); //turn LED off
}
else{ // button pressed
digitalWrite(LEDpin,HIGH); // turn LED on
}
}
ye
Now I just need a on and off push button to turn on or off the dc motor, and set the motor speed to 200 rpm in the code. However, I need assistance in adding the set speed in my code.
// declare variables
const int LEDpin = 9;
const int potpin = A0;
int pot;
int speed;
void setup(){
// don't need to use pinMode
// with analogRead and analogWrite
}
void loop(){
//read button state
state = digitalRead(butpin);
// check if button is pressed
if(state ==HIGH){ // button not pressed
digitalWrite(LEDpin,LOW); //turn LED off
}
else{ // button pressed
digitalWrite(LEDpin,HIGH); // turn LED on
}
}
no, but i am searching for one push button to turn on or off the dc motor, and set the motor speed to 200 rpm in the code, with diode, and NPN transistor @docdoc
const int BUTTON_PIN = 2; // Arduino pin connected to button's pin
const int POTENTIOMETER_PIN = A0; // Arduino pin connected to potentiometer pin
const int MOTOR_PIN = 9; // Arduino PWM pin connected to motor driver
byte ledState = LOW; // The current state of the built-in LED
byte lastButtonState; // The previous state of the button
byte currentButtonState; // The current state of the button
void setup()
{
Serial.begin(9600);
pinMode(BUTTON_PIN, INPUT_PULLUP); // Set button pin to input pull-up mode
pinMode(LED_BUILTIN, OUTPUT); // Set LED pin to output mode
pinMode(MOTOR_PIN, OUTPUT); // Set motor pin to output mode
lastButtonState = digitalRead(BUTTON_PIN); // Read the button state
}
void loop()
{
currentButtonState = digitalRead(BUTTON_PIN); // Read the new button state
if (lastButtonState == HIGH && currentButtonState == LOW)
{
Serial.println("The button is pressed");
ledState = !ledState; // Toggle state of LED
}
lastButtonState = currentButtonState; // Save the last button state
// control LED according to the toggled state
digitalWrite(LED_BUILTIN, ledState);
if (ledState == HIGH)
{
// Read the potentiometer value
int potValue = analogRead(POTENTIOMETER_PIN);
// Map the potentiometer value to motor speed range (0-255)
int motorSpeed = map(potValue, 0, 1023, 0, 255);
// Set the motor speed
analogWrite(MOTOR_PIN, motorSpeed);
}
else
{
// Turn off the motor
analogWrite(MOTOR_PIN, 0);
}
delay(50);
}
I hope it isn't a problem for you to turn it on or off with a button...
That project sets the motor speed using a potentiometer, so you can use it to see how you can control the speed and how change it programatically.
Is it a problem for you testing that code and see how it works? Or you want us doing the things for you?
////////////**** MOTOR SPEED*****////////////////////
// Adjust to whatever you like: 0=stop, 255=full speed
int motorSpeed = 100;
////////////////////////////////////////////////////
const int BUTTON_PIN = 2; // Arduino pin connected to button's pin
const int MOTOR_PIN = 9; // Arduino PWM pin connected to motor driver
byte ledState = LOW; // The current state of the built-in LED
byte lastButtonState; // The previous state of the button
byte currentButtonState; // The current state of the button
void setup()
{
Serial.begin(9600);
pinMode(BUTTON_PIN, INPUT_PULLUP); // Set button pin to input pull-up mode
pinMode(LED_BUILTIN, OUTPUT); // Set LED pin to output mode
pinMode(MOTOR_PIN, OUTPUT); // Set motor pin to output mode
analogWrite(MOTOR_PIN, 0); // Stop the motor
lastButtonState = digitalRead(BUTTON_PIN); // Read the button state
}
void loop()
{
currentButtonState = digitalRead(BUTTON_PIN); // Read the new button state
if (lastButtonState == HIGH && currentButtonState == LOW)
{
Serial.println("The button is pressed");
ledState = !ledState; // Toggle state of LED
}
lastButtonState = currentButtonState; // Save the last button state
// Control LED according to the toggled state
digitalWrite(LED_BUILTIN, ledState);
if (ledState == HIGH)
{
// Turn on motor with speed = motorSpeed
analogWrite(MOTOR_PIN, motorSpeed);
}
else
{
// Turn off the motor
analogWrite(MOTOR_PIN, 0);
}
delay(50);
}
Ok, but what about the code you have shown us on post #14, different from the first one? What you think it does? Have you tried running that code with a potentiometer attached?
If so, you just need to set the potentiometer to get the motor speed you require, and se what is the (fixed) value you need for the analogWrite() statement. to get that value, just print it on the Serial and see the value suitable for you the remove the potentiometer readings and set that constant value to motorSpeed variable.
PS: to make things easier for you and us, especially when dealing with some code and "standard" devices, I always recommend using a simulator like "Wokwi". You can draw your project (good to copy/paset it here), test it, and even share the project link so as we can copy it on our Wokwi, make more tests, and even share you back to see the changes!
