Weird values using a Potentiometer

Projects Programming
1

Hello !

I am currently testing some things with a LCD screen and a potentiometer.

However, there is a problem, the values displayed in the Serial monitor and on the LCD are not the same : for example, with 10 in the serial monitor, a 1089 is displayed on the LCD, or with a 975, a 9759 is displayed. I do not quite understand how it is possible...

Here is my code :

#include <LiquidCrystal.h>

LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
int Pot;

void setup() {
  lcd.begin(16, 2);
  lcd.print("Potentiometre");
  Serial.begin(9600);
}

void loop() {
  Pot = analogRead(A0);
  lcd.setCursor(0, 1);
  lcd.print(Pot);
  delay(200);
  Serial.println(Pot);
  }

Thanks,
Leo

2

Your topic was MOVED to its current forum category which is more appropriate than the original as it has nothing to do with Installation and Troubleshooting of the IDE

3

The extra digits are still on the display from the previous value printed. Print spaces after the new value to erase them

1 Like
4

Well spotted!
Another cure would be lcd.clear(); before you print a new value.

5

Yes that is well spotted !

That is what I've done to finish, thanks so much to both of you !

6

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