I'm using an Arduino Nano to control a stepper motor and LCD. I have a button as an input for controlling the state of the stepper, a button to reset the Arduino and potentiometers to control the number of rotations for the stepper.
The idea is for the user to set the number of forward and backward rotations using the two potentiometers then press the button to start. The Arduino counts the number of forward rotations the stepper has gone through then goes backwards. Once the number of backward rotations has been achieved, it stops. There is a reset button to start the process again.
My issue is, when the Arduino is running off a power supply, it resets when I press the button to start the stepper rotations. All seems fine when the Arduino is plugged into my USB port.
Things I've tried:
- Run the 5 volt line for all inputs from voltage regulator
- Run the 5 volt line for LCD from voltage regulator
- Use a separate voltage regulator for LCD
- Use resistors to limit current draw from digital pins to LCD
- Use resistors to limit current draw from digital pins to stepper motor
- Tried using 9V/650 mA, 12V/1A, 12V/3A power supplies
- Tried placing a capacitor between VSS(Ground) and VDD(+5V) of LCD
All to no avail.
Apologies if there are errors in my breadboard layout. I'll make necessary changes but as I said, it works when connected to a USB port.
Here is the stepper:
#include <AccelStepper.h>
#include <LiquidCrystal.h>
#include <Bounce2.h>
AccelStepper stepper(4, 3, 4, 5, 6); //4 wire stepper, blue, red, green, black
//LiquidCrystal lcd(6, 7, 5, 4, 3, 2); //RS, E, D4, D5, D6, D7
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); //RS, E, D4, D5, D6, D7
Bounce button = Bounce();
const int fullStepCount = 200;
int stepPos = 0;
int stepCounter = 0;
int FstepperCounter = 0; //Counts the forward rotations
int BstepperCounter = 0; //Counts the backward rotations
int buttonPin = 2;
boolean buttonOn = false;
int forwardCount = 0;
int backwardCount = 0;
int currentCounter = 0;
int buzzer = 13;
//String directionText = "";
//Twister State: 0 = OFF, 1 = FORWARD, 2 = BACKWARD, 3 = FINISHED
int twisterState = 0;
//Poteniometer Settings
int potOne = 0;
int potTwo = 1;
int potOneVal = 0;
int potTwoVal = 0;
int mapPotOneVal = 0;
int mapPotTwoVal = 0;
void setup() {
Serial.begin(9600);
stepper.setMaxSpeed(500);
stepper.setAcceleration(200);
button.attach(buttonPin);
button.interval(5);
lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print("Hello");
delay(2000);
lcd.clear();
lcd.print("Tetrode Twister");
lcd.setCursor(0, 1);
lcd.print("Version 2.0");
delay(2000);
lcd.clear();
lcd.print("Live Free");
lcd.setCursor(0, 1);
lcd.print("Or Die Hard!");
delay(2000);
lcd.clear();
pinMode(buzzer, OUTPUT);
}
unsigned long prev = 0;
int inter = 200;
void loop() {
updatePots();
updateLCD();
updateStepper();
}
void updateStepper() {
stepper.run();
button.update();
boolean newState = button.rose();
if (newState == true) {
buttonOn = !buttonOn;
twisterState = 1;
}
if (buttonOn == false) {
twisterState = 0;
}
if (twisterState == 1) {
stepper.move(200);
stepPos = abs(stepper.currentPosition());
stepCounter = stepPos % fullStepCount;
if (stepCounter == 100) {
currentCounter += 1;
//delay(10);
}
if (currentCounter > forwardCount) {
twisterState = 2;
currentCounter = 0;
}
}
else if (twisterState == 2) {
stepper.move(-200);
stepPos = abs(stepper.currentPosition());
stepCounter = stepPos % fullStepCount;
if (stepCounter == 100) {
currentCounter += 1;
//delay(10);
}
if (currentCounter > forwardCount) {
twisterState = 3;
currentCounter = 0;
}
} else if (twisterState == 0 || twisterState == 3) {
stepper.move(0);
}
Serial.println(stepCounter);
Serial.print("\t");
Serial.print(FstepperCounter);
Serial.print("\t");
Serial.print(BstepperCounter);
Serial.print(currentCounter);
Serial.print("\t");
Serial.println(twisterState);
delay(10);
}
void updateLCD() {
//if (twisterState < 3) {
if (twisterState == 0) {
lcd.setCursor(0, 0);
lcd.print("FOR:");
lcd.setCursor(4, 0);
lcd.print(" ");
lcd.setCursor(4, 0);
lcd.print(forwardCount);
lcd.setCursor(8, 0);
lcd.print("REV:");
lcd.setCursor(12, 0);
lcd.print(" ");
lcd.setCursor(12, 0);
lcd.print(backwardCount);
} else if ( twisterState == 1 || twisterState == 2) {
lcd.setCursor(0, 0);
lcd.print("FOR:");
lcd.setCursor(4, 0);
lcd.print(forwardCount);
lcd.setCursor(8, 0);
lcd.print("REV:");
lcd.setCursor(12, 0);
lcd.print(backwardCount);
lcd.setCursor(0, 1);
lcd.print("COUNT:");
lcd.setCursor(6, 1);
lcd.print(currentCounter);
lcd.setCursor(9, 1);
lcd.print("STATE:");
lcd.setCursor(15, 1);
lcd.print(twisterState);
} else if (twisterState == 3) {
delay(2000);
lcd.clear();
lcd.print("TWISTER FINISHED");
}
}
void updatePots() {
if (twisterState == 0) {
potOneVal = analogRead(potOne);
potTwoVal = analogRead(potTwo);
mapPotOneVal = map(potOneVal, 0, 1023, 0, 100);
mapPotTwoVal = map(potTwoVal, 0, 1023, 0, 100);
}
forwardCount = mapPotOneVal;
backwardCount = mapPotTwoVal;
}
