Help with LCD connection to Arduino

Other Hardware General Electronics
1

Hello,

I am a complete beginner to Arduino and need help with the following issue:
I've been trying to connect my LCD―the backlight is turning on but the pot isn't adjusting the contrast, so I cannot see anything when I upload my code. Have I wired something incorrectly or written my code wrong?

I've attached all the images in the following Google Doc: LCDwiring - Google Docs

#include <LiquidCrystal.h>

LiquidCrystal lcd (4, 6, 10, 11, 12, 13);

void setup() {
    lcd.begin(16, 2);

    lcd.print("a");
    delay(2500);

    lcd.print("b");
    delay(2500);
}

void loop() {}
2

Check your wiring. Since you didn't specify RW in the declaration, is it connected to GND?

3

Shall we have a look at a schematic of your project and some clear photographs, then?

5

Yeah, I've attached them in the following Google Docs: LCDwiring - Google Docs

6

My bad, I'm still super new to this system. The GND wire connects on the same column as the A pin on the LCD. Would this be the issue?

7

Hi, @ryanne2000
Welcome to the forum.
In this image;

image
image689×581 33.5 KB

image
image723×794 149 KB

The yellow is not connected to the potentiometer wiper.

The wiper terminal in your project is connected to the red or blue bus along the edge of the proto board.
image

Do you have a DMM? (Digital MultiMeter)

You can post your images directly into your post.

Thanks. Tom.. :smiley: :+1: :coffee: :australia:

8

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