Project V - 16. Setting Set Point Value Without Keypad Input (Arduino Based)

Project V - 16. Setting Set Point Value Without Keypad Input

If you have trouble finding the keypad or pin less arduino if added keypad, well here's an easy way to make a replacement keypad with potentiometer. Potensio meter is used to designate the desired set point value and then the setting button is used to determine the set point value. The display is displayed on the LCD.

Hardware Requirement

Potentiometer
Arduino Uno
Push Button
Power supply +5 Volt
Jumper

Potentiometer | Source

Block Diagram

Schematic

Arduino - LCD Wiring

Arduino - Potentiometer Wiring

Arduino - Button Wiring

Source Code/Sketch

#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
int adc,nilai, pos;
long setpoint;
const int tombolSET = 8;
void setup(){
pinMode(8,LOW);
digitalWrite(8, HIGH);
lcd.begin(16, 2);
lcd.print("Seting Nilai");
lcd.setCursor(0,1);
lcd.print("Tanpa Keypad");
delay(2000);
lcd.clear();
lcd.print("Nilai=");
lcd.setCursor(0,1);
lcd.print("SP=");
lcd.blink();
pos=3;
}
void loop(){
adc = analogRead(0);
nilai=map(adc,0,1000,0,9);
lcd.setCursor(6,0);
lcd.print(nilai);
lcd.setCursor(pos,1);
if(digitalRead(tombolSET)==LOW){
setpoint=setpoint*10+nilai;
lcd.setCursor(3,1);
lcd.print(setpoint);
pos++;
delay(200);
}
delay(200);
}

How it Works

1. Connect the Arduino with Peripherals needed
2. Plug in the Power Source on the device
3. Compile and upload the script program above to your arduino
4. First initial LCD