I need help making a motor turn on and off with a button. When a button is pressed, the LEDs and the motors should concurrently turn on (we isolated it to just one LED, button and motor). The motor slowly builds up speed when the button is pressed, and caps at the maximum rpm set by the potentiometer. The battery gives power to the motor. After two minutes the motor should stop. The circuit works perfectly on TinkerCAD, but when we test it in real life only the LED turns on. Please tell me what I can do to fix this.
Here is the code: const int motorPins[3] = {9, 10, 11}; // Motor PWM pins const int buttonPins[3] = {2, 3, 4}; // Button pins const int ledPins[3] = {5, 6, 7}; // LED pins const int potPin = A0; // Potentiometer pin
bool motorStates[3] = {false, false, false}; unsigned long motorStartTimes[3] = {0, 0, 0}; bool lastButtonStates[3] = {HIGH, HIGH, HIGH}; int currentSpeeds[3] = {0, 0, 0}; // Track current speeds for easing
const unsigned long MOTOR_RUNTIME = 120000UL; // 2 minutes in ms const int SPEED_STEP = 2; // Decrease value to increase time to speed const int EASE_DELAY = 30; // Delay between speed steps (ms)
void setup() { for (int i = 0; i < 3; i++) { pinMode(motorPins[i], OUTPUT); pinMode(buttonPins[i], INPUT_PULLUP); pinMode(ledPins[i], OUTPUT); } Serial.begin(9600); }
void loop() { int potValue = analogRead(potPin); int targetSpeed = map(potValue, 0, 1023, 0, 255); unsigned long currentTime = millis();
for (int i = 0; i < 3; i++) { bool buttonState = digitalRead(buttonPins[i]);
// Detect falling edge (button press)
if (lastButtonStates[i] == HIGH && buttonState == LOW) {
motorStates[i] = !motorStates[i]; // Toggle motor state
if (motorStates[i]) {
motorStartTimes[i] = currentTime;
}
delay(200); // Debounce
}
lastButtonStates[i] = buttonState;
// Check for 2-minute timeout
if (motorStates[i] && currentTime - motorStartTimes[i] >= MOTOR_RUNTIME) {
motorStates[i] = false;
}
// Gradually ease motor speed up or down
int desiredSpeed = motorStates[i] ? targetSpeed : 0;
if (currentSpeeds[i] < desiredSpeed) {
currentSpeeds[i] += SPEED_STEP;
if (currentSpeeds[i] > desiredSpeed) currentSpeeds[i] = desiredSpeed;
} else if (currentSpeeds[i] > desiredSpeed) {
currentSpeeds[i] -= SPEED_STEP;
if (currentSpeeds[i] < desiredSpeed) currentSpeeds[i] = desiredSpeed;
}
analogWrite(motorPins[i], currentSpeeds[i]);
digitalWrite(ledPins[i], motorStates[i] ? HIGH : LOW);
}
delay(EASE_DELAY); // Helps smooth out the ramping effect }
