Coil winding : Arduino Counter

Have you ever wanted to know the exact number of turns you put into your coil ?

With this fast little trick, you will be able to count the number of turns that you put into your coil.

What you need :

• 1x : Arduino Uno/Nano
• 1x : Reed Switch (opened by default)
• 1x : neodynium magnet
• 1x : Push Button
• 1x : 16×2 LCD Screen (I2C)

 

Schematic :

 

The Setup :

And for sure the Arduino Code  :

#include <Wire.h>
#include <LiquidCrystal_I2C.h>


//PIN MODES 
const int pinButtonReset = 9; //pin for the reset command button
const int pinReedSwitch = 2; //pin for the reed switch

//DISPLAY CONSTANTS
const int START = 0; // Basic Menu first menu to display
int menu = 0; //Setting to START menu when powering on the device
int menuType = START;

//INIT COUNTER
int count = 0;

long lastDebounce = 0;
long debounceDelay = 20; // Ignore bounces under 20ms


LiquidCrystal_I2C lcd(0x3F,16,2); //crystal adress for real LCD
//LiquidCrystal_I2C lcd(0x27,16,2); //crystal adress for the LCD in Proteus


void setup()
{
lcd.init(); //init for LCD
lcd.backlight(); //light for LCD

Serial.begin(9600); //serial feedback
pinMode(pinButtonReset, INPUT_PULLUP);
pinMode(pinReedSwitch, INPUT);
digitalWrite(pinReedSwitch, HIGH);

attachInterrupt(digitalPinToInterrupt(2), counter, FALLING);
updateDisplay(); //display menu 
}

void loop()
{
stateButtonReset(); //we check the status of the reset button
updateDisplay(); //display data

delay(500);
}


void updateDisplay() {
lcd.clear(); //clear display before printing

switch (menuType) {
case START: 
lcd.setCursor(0,0); //top left
lcd.print("Turns:"); //we print the text on the screen
lcd.print(count);
break;
}
}

void counter() { //we increase the counter

if( (millis() - lastDebounce) > debounceDelay){ 
count++; 
lastDebounce = millis();
}
}

void stateButtonReset() { //we check the button

if (digitalRead(pinButtonReset)==LOW)
count = 0; 
}