Questions tagged [lcd]

LCD stands for "Liquid Crystal Display" and is commonly known as a screen. The tag should be used for questions related to LCD display.

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Arduino TFT LCD Data Logger

Can I use Arduino TFT LCD Module ILI9341 as a data logger? It has an SD card slot at the back, I wonder if the data will be saved on the SD card? Thanks!
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51 views

LCD screen stops displaying after DC motor starts

LCD screen stops displaying after DC motor starts I have 3 main components: LCD, thermal resistor, and a DC motor running a fan. The LCD displays the temperature reading from the thermal resistor and ...
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33 views

Error compiling for Arduino Nano 33 BLE with LiquidCrystal library

I recently started coding in the Arduino IDE for the Arduino Nano 33 BLE I bought. When I choose the Nano 33 BLE as my board, I get the following Error: Arduino: 1.8.11 (Windows 10), Board: "Arduino ...
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LCD is supplied more than required current [closed]

So, i am trying LCD 16x2 module for the first time and don't how solve this problem. I know the current is more, also I've tried using Resistors, etc. but to no avail. Please suggest a solution. Also ...
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Noob here.. Need help with a thermostat controlled relay

So After trying several sketches for a LM35 and none working I finally found one that was giving me accurate results. The problem is the code is way over my head. I was able to modify it enough to get ...
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29 views

SPI command versus data?

I have bough an LCD screen display TFT Touch Screen Board For Arduino UNO R3. Aand the following commands are given to me for the initialization: write_SPI_commond(0xFF); write_SPI_commond(0xFF); ...
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Topic: How to draw a circle on LCD128x64?

I want to know what's the default or recommended arithmetic to draw a circle on the LCD128x64 using ST7920 driver. I've done the following functions: drawing a pixel at any point on the LCD sending ...
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47 views

16*2 LCD on nodeMCU

I am getting this error while uploading a simple LCD program on NodeMCU can anyone guide me??........ esptool.py v2.8 Serial port COM9 Connecting........_____....._____....._____....._____....._____.....
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1answer
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Black boxes are appearing on the second row of my LCD

the black boxes on the LCD are only on both rows and appear only when I attach the heart rate sensor to my body and blink with a delay of about 2 seconds and my contrast and wiring are perfect, the ...
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1answer
30 views

How to make a dynamic menu with a sub-menu ( Arduino mega or Arduino Uno)

I have an arduino mega with a LCD shield (from keyestudio KS2056). I am trying to create a menu with a submenu that would have addable and removable strings based on inputs from a RFID scanner(addable)...
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LCD Backlight doesn’t work even at 5V. Using 330 Ohm resistor

I’ve been trying to make this project: https://create.arduino.cc/projecthub/chummer1010/electronic-safe-with-arduino-25d039 I’m confident that I’ve assembled everything correctly, but my LCD doesn’t ...
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38 views

How to fill a triangle using the LCD5110 Graph library?

Good day! I'm currently trying to create a small 3D engine using C++, an Arduino UNO as well as a Nokia 5110 display with a library. Now I have successfully drawn a cube using triangles, but I want to ...
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Dim 4k LCD panel in response to ambient light

Warning: I'm completely new to Arduino, and not even sure if it's the right solution here. I'm trying to make a better digital picture frame. Got almost all the way there by just buying a nice flat-...
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39 views

Problem with printing keypad input to the LCD in a while loop

this is my first post here, though I have been following this forum for a while (pun intended). I am trying to write a program for a machine that will drill holes in a metal rail, and cut the rail to ...
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1answer
111 views

First time using Kuman 3.5" TFT screen model SC3A-NEW-UK with Arduino

I bought online this LCD Touchscreen Kuman SC3A-NEW-UK. It uses ILI9486 drivers, but it didn't include any instructions manual, and kumantech.com seems to be devoid of complete technical documentation ...
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Why am I receiving this error: “expected unqualified-id before numeric constant”?

#include <LiquidCrystal.h> LiquidCrystal 1cd(12, 11, 5, 4, 3, 2); const int switchPin = 6; int switchState = 0; int prevSwitchState = 0; int reply; void setup() { 1cd.begin(16, 2); pinMode(...
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47 views

LCD connection problem

First of all, i have some problems with an lcd . For a better understanding, the lcd datasheet could be found here: https://www.mikrocontroller.net/attachment/53098/DGF-12232-S1FBLY-325-17231-1006.pdf ...
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LCD screen suddenly displaying and updating inaccurately

For the final project of my Arduino course, I have decided to make an alarm clock. The actual clock part was easy enough, but when I wired my buttons up, I accidentally loosened a few wires that a ...
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1answer
42 views

Use JYETech 2.4 Inch LCD Display Screen Module with Arduino?

I have this JYETech 2.4 Inch LCD Display Screen Module that I would like to use for a project I have in mind, however, I'm not sure how to wire it up with my Arudino Mega. Here is the datasheet for ...
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1answer
39 views

Can you use a 128 pin LCD on an atMega?

I found a couple old calculators and their LCD's have about 130 pins. I was wondering if I can build an LCD driver to reduce the number of I/O pins, because I don't want to use like 14 I/O extenders; ...
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25 views

ARduino dfplayer and LCD interfacing simultaneously [duplicate]

I have separate codes. 1) for displaying data on 16*2 LCD which is shifting at 0.5 seconds 2) another code for playing songs on DFplayer (2 minutes song whic plays when I press a button) I want to ...
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167 views

How Can I convert my arduino code to C/C++ embedded code [closed]

For example I have an code for arduino but I want to change it to embedded C to create more professional project with different hardware. is there any tutorial? I know the logic and the most of the ...
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51 views

LCD Blinking after inserting code : A medication reminder system using Arduino Uno

RTC DS3231,Arduino Uno and 4 push buttons, 10K potentiometer, 4 of 10K resistor and a buzzer. I decided to follow from an online source and encounters a few problems which already fixed but this one ...
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69 views

How to program Arduino LCD shield with Python?

so I want to run a Arduino LCD shield with Python code..But after having some research on the Internet, I can not found any tutorial, some just give some basic code with LED. And one things that how ...
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Ethernet.h Ethernet.Begin(mac) only connects if i have a LiquidCrystal object from LiquidCrystal.H

I have the following code; #include <Ethernet.h> #include <SPI.h> #include <LiquidCrystal.h> LiquidCrystal lcd(31, 30, 29, 28, 27, 26, 25, 24, 23, 22); byte mac[] = { 0xDE, 0xAD, ...
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Why is my LCD I/F PIN ADAPTER won't work

I bought this on the store near us. Here is the PDF for it. https://www.e-gizmo.net/oc/kits%20documents/new%20LCD%20with%20converter/LCD%20IF%20pin%20adapter.pdf I followed the instructions below ...
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93 views

LCD screen won't stop printing the same characters twice

I'm hoping that someone might be able to help me figure out how to prevent my LCD from giving me double digits (i.e. 55, 66, 77 - instead of 5,6,7); I have 2 functions that are printing, so I'm ...
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31 views

a code to implement a simple traffic signal and also display on LCD which color is ON?

I have tried code given below for simple traffic signal and also display on LCD which color is ON, but it didn't work. Please me to make it work. int red = 10; int yellow = 9; int green = 8; #include ...
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30 views

Motor is vibrating in one direction

When I test this program, the motor starts vibrating when proxy1 is low and proxy2 is high. The displayed text also goes wrong. #include <LiquidCrystal.h> LiquidCrystal lcd(8,9,4,5,6,7); int ...
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49 views

LCD displays bad character while counting rotation

I have been practicing RPM and rotation counter in arduino using infrared optocoupler. I try to implement number of rotation for drill machine but whenever drill starts to rotate, LCD prints bad ...
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I tried making a digital tachometer using an IR sensor but my lcd display is showing random characters

#include<LiquidCrystal.h> LiquidCrystal lcd(12, 11, 6, 5, 4, 3); float value = 0; float rev = 0; int rpm; int oldtime = 0; int time; void isr() //interrupt service routine { rev++; } void ...
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qMenuSystem using DigoleSerial library doesn’t work on my I2C Monochrome OLED

Just like the title says I’m trying to make qMenuSystem to work with my oled display. Here is what I know so far about my display : - It's a Monochrome OLED 128x64 (Blue) Display - It's connecting ...
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1answer
35 views

qMenuSystem Oled I2C can't make it work

I'm trying to make the qMenuSystem to work with my I2C Monochrome OLED display but without any luck. To summarize all here's what's with it : - the qMenuSystem is using a library called : ...
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1answer
149 views

LCD shield submenu

I need to make an app that does various functions regarding IR signals (remote-like) I need to create a sub menu in order for me to access multiple functionalities. Arduino-Uno-Menu-Template I used ...
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1answer
130 views

Arduino Ultrasonic Sensor and LCD - Help Needed-

I just recently purchased an Arduino Uno 3 and I wanted to make an ultrasonic distance sensor that outputs the readings to a 16x2 LCD. I followed this guide: http://www.mertarduino.com/using-...
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Using a 122x32 LCD display with u8g2

I recovered a 122x32 graphic LCD display, its reference is NMTB-S000087FYHSAY-04. Here are some pics It was retrieved from a completely rusted object, but the screen seems to work. It is a 122x32 ...
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344 views

Error: “'lcd' does not name a type” using LiquidCrystal library

I'm following an online Arduino tutorial/course and trying to make a simple moving character on an LCD screen, but for some reason I get the following error: "error: 'lcd' does not name a type". I'm ...
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1answer
47 views

I´m trying to make a kind of videogame with Arduino UNO

it´s a school project, but I'm having some problems to create a menu selection. In the LCD, all the character are overwriting, I'm a beginer, so i dont have any idea of what i was doing wrong (ps.: ...
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1answer
92 views

Two Arduino Control a LCD Display

I´m building a system that has two arduinos (like the image on the botton) linked via ICSP. The "Programer" programs the second one, called "Worker"( with a .hex file in the SD card of the Programer)....
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38 views

Sending code for error detection facing problem with error not able to compile code

MY PROJECT CODE: #include ESP8266WiFi.h #include LiquidCrystal.h #include FirebaseArduino.h> #include HX711.h> #define FIREBASE_HOST "iot-based-smart-dustbin.firebaseio.com" #define ...
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2answers
76 views

How to read distance of passing object?

Ok, guys this is my first post and I am new to Arduino but somewhat familiar with programming so I hope you guys can assist me. If any of this is confusing, I apologize in advance! :) I want to be ...
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1answer
591 views

Timer Countdown to control relay (multiple functions in void loop)

I'm trying to build this project with a simple code. Object is to hit up button to increment minutes or down to decrement minutes then hit start to start countdown, while its counting relay will turn ...
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1answer
216 views

16/2 arduino I2C lcd display not lighting up?

I am working with an I2C lcd display with an arduino uno board I have connected the gnd pin to gnd of arduino uno and the vcc pin to 5V of arduino uno and the display is not even lighting up there is ...
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31 views

TouchScreen GUI Reference Guide Help

Recently I have gotten some Touchscreens to add to my projects and I am very excited to use them. However, I am not sure where I can find a guide to help me create my own GUI with the touchscreens. ...
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467 views

Controlling 16x2 LCD backlight (I2C module)

I've installed an I2C module on my 16x2 LCD so i don't have access to all those LCD pins to control the backlight LED. BUT there is a 100 ohm smd resistor in series with anode of the backlight LED, i ...
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209 views

lcd.clear doesn't work with Serial.begin(9600) on Arduino Mega 2560

So I have a standard 16x2 LCD display with 16 pins. The LCD display works fine with every other aspect, however, the "lcd.clear" function doesn't work with "Serial.begin(ANY BAUD)". I have tried ...
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98 views

Is this the right way to blink a character on LCD?

The code is this: #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); unsigned long blinkTime = 0; int ValueA = 22; String placeHolder = " "; void ...
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35 views

Controlling UC1638 Graphical LCD screen (C, with Arduino)

I am using Arduino Uno, trying to control LCD screen type UC1638 (240x128 monochrome) I want to fillup the screen in black). Searching up the internet I ended up using this code (written in C): /* ...
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81 views

20x4 LCD shows up as 20x2

I need help with my LCD. I have a 20x4 LCD and it shows up as 20x2. The LCD address said "// Set the LCD address to 0x27 for a 16 chars and 2 line display". I changed it which says "// Set the LCD ...
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How to modify a created byte?

I have created a byte for 16x2 LCD. It is basically a custom character which I will have to change later. byte char[8]{ B10000, B01000, B00100, B00010, B00001, B11000, B11100 }; I want to ...

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