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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How can i call lcd.begin() from several different code files in a proper way?

I have a project split into several files: //Loop.cpp #include "LiquidCrystal.h" void setup(){ LiquidCrystal lcd(12, 11, 5, 4, 3, 2); lcd.begin(16, 2); } void loop() { //Code } ...
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Why is my liquid crystal display not showing any output?

UPDATE: The LCD will light up only when the all my components are located in the bottom right of the breadboard. Why am I not able to use the entire breadboard for my circuit? I am trying to display ...
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27 views

How to program the joystick button to reset everything?

In this project, I'm making a stickman rush game with a joystick. Where when the joystick moves up and down, the stickman also moves up and down. And there are obstacles, that when the stickman ...
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How to completely clear everything from an arduino and print something new?

I'm in progress of making a stickman rush game, Until I hit a bug that I have been stuck on. I want to make a if statement that states "If the stickman and the object are in the same place, clear ...
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1answer
35 views

Getting errors i don't understand [closed]

I was following a tutorial for my class (the tutorial was assigned) and I did everything the guy did to the letter but i got errors he didn't and they were errors I didn't get while programing similar ...
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23 views

Arduino Mega with Sensors and tftlcd 2.4 inch

I am working with tftlcd 2.4 inch with Arduino mega 2560 board. In this code I just want to show clock as my default or home screen. By clicking on clock at any point on screen user should get a new ...
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1answer
31 views

How to use LCD Screen and IR Remote to broadcast a countdown

I am trying to use an IR Remote to input date's and time's for a countdown, so then the LCD will display a countdown, like this: LCD: Enter Year Remote-Input: 2021 LCD: Enter Month Remote-Input: 08 ...
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1answer
46 views

I've been working on a project and I get an error compiling for board arduino uno. kindly help

##include <jm_LiquidCrystal_I2C.h> #include <LiquidCrystal.h> #include <Wire.h> // For I2C //Set the pins on the I2C chip used for LCD connections //ADDR,EN,R/W,RS,D4,D5,D6,D7 ...
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1answer
50 views

lcd byte array display

when reading RFID(MIFARE) information using Arduino mega and display in serial monitor it works fine. But, when printing on 2004LCD only one information(Value) displays correctly. The other ...
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Unknown errors compiling BreakoutST7735 128*128 [closed]

please tell me how should I solve these errors? #error ENABLE_EXTENDED_TRANSFER_CLASS must be set to 1 in SdFat SdFatConfig.h #error FAT12_SUPPORT must be set to 1 in SdFat SdFatConfig.h thanks
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1answer
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help adapting a sketch to use a 16x2 lcd

I have found a great instructable that shares a sketch. I'm a noob, but i think i do understand it and how to adapt it for my use, but he has used a different display than i have.... and I just don't ...
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16 by 2 lcd display is not showing any character

I am trying to interface 16by2 lcd with msp432p401m controller but my 16 by 2 lcd is not showing any character. I have attached schematic and code for reference. By using same schematic and code 20 by ...
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Display problems with the 1602A LCD Display while the COM7 shows the results

I am trying to use an Arduino for a temperature sensor, the sensor will use an if-else command to give the temperature reading. I didn't wrote the whole code but found the code and was making ...
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1answer
43 views

OSEPP 16x2 LCD Display Turns On But Does not Display any White Boxes

Circuit Wiring This is my first ever post on here and it is due to a recent personal project i started on a Mega 2560 board. (I was attempting to build a temp and humidity sensor for which i would ...
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2answers
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Arduino Pico doesn't work with ST7735 screen

I am attempting to get the graphicstest example bundled with the Adafruit ST7735 library for the 0.96 inch LCD screen. The example runs fine and serial communication is up and running. However, ...
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How to stop my 16*2 lcd blink?

Here I wrote code for my weighting scale measurement. In which I added an on/off switch for my LCD display. But in defined delay time my LCD is a blink and I do not want it. I want my LCD switch on/...
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LCD display interfaced with Arduino Uno not displaying values

I am a beginner on Arduino. I have a project that I will only be using: a heart rate sensor whose values I am displaying on an LCD display. The code compiles and uploads once I set my project up, but ...
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Cant find Sdl and Sca pins in lcd display

My project is of non contact temperature sensor.I am using RG1602A lcd display and mlx90164 temperature sensor. But the problem is, there's no sdl , sca pins in my lcd display. Is there any way, to ...
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Is this circuit connected right?

I want to create something similar to an article I read a few months ago about the effects of Dopamine. Dopamine is known as the feel-good neurotransmitter; the brain releases it when we eat food that ...
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2answers
39 views

How do I program an LCD screen and do I need an Arduino

I am trying to create a small device with a screen that tells the date and time. I am thinking of using a UCTRONICS 0.96 Inch OLED Module (type that on Amazon). I am very new at coding, and I know ...
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1answer
35 views

Weird char on a 20X4 LCD

I'm trying to make an RC controller. I have a problem with my LCD. I have already double-checked the wiring and the connections are great. I made a PCB with Kicad and order it to JLCPCB. I have some ...
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1answer
127 views

How to connect an lcd i2c using only pins A0 and A1 (SDA, SCL, GND, and VCC are given)

I want to know how to connect an lcd i2c, with an led 8x8 matrix at the same time. The problem is, all the analog in pins are used, except A0 and A1. Using this tutorial: https://www.makerguides.com/...
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45 views

Phantom reading

my project is to control led diode and dc motor, test shield buttons, and check system run time. Testing buttons and run time i have done. Deal is with led and dc motor control. I'm getting phantom ...
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50 views

LCD 16x2 shows one line cut and the 7th column also cut

My 16x2 LCD shows one line cut and the 7th column also cut: Applying pressure:
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Arduino LCD only display image for few second and turn screen to white

I have a problem with my Arduino and LCD touch screen. I create a few functional button in my Arduino. One of the button is START button. Right now, I want the image is display when I touch START ...
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34 views

CAN bus communication and LCD updation

I am trying to communicate arduino uno with CAN bus using MCP2515 shield. Data sending and receiving both things are done. Whatever data received is displayed on LCD. CAN bus receive is done using ...
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2answers
133 views

Sending letter by letter to LCD, however the LCD knows the full string?

I think this is my last post about this specific project, but I got a really weird curveball right now I managed to do the webpage I wanted, and pass the string along. Now, when a LED lights up, it ...
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3answers
98 views

Why Are My High and Low Values Not Updating Correctly During Successive Loops

I am attempting to capture the high and low temperature and humidity values, then clearing the LCD and displaying them on 2 successive screen updates. All is working correctly except that the ...
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2answers
59 views

How to make my LCD screen brighter

I'm trying to make my LCD screen brighter, can someone can help? These are the code and the connections: //LCD #include <LiquidCrystal.h> int Contrast=75; LiquidCrystal lcd(12, 11, 5, 4, 3, 2); ...
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52 views

Why doesn't LCD 16x2 work with fingerprint sensor code?

When I separate fingerprint code and LCD code it works fine. sensor read 6 templates which I already stored 6 fingers ID. When I combine the code it read 0 templates. #include <Adafruit_Fingerprint....
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1answer
53 views

Infamous white squares for LCD display

I would like to know what I've done wrong. I configured my circuit using the "Hello world tutorial. I got the infamous white square pattern D7 to pin 2 D6 to pin 3 D5 to pin 4 D4 to pin 5 E to ...
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1answer
121 views

Recommendation for a projector module or approach?

I am looking to create a projector effect similar to one seen in projector alarm clocks like https://www.amazon.com/Mooas-White-Projection-Alarm-Projector/dp/B07Q6W53LK/ref=asc_df_B07Q6W53LK/?tag=...
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1answer
76 views

Standalone ATmega clock continuous lifetime

Here I have made a standalone ATmega328p clock without any RTC module using the breadboard ATmega328p , LCD I2C , and some buttons which I would like to turn on for atleast an year (supposed to be ...
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102 views

DHT11 thermometer connected to a LCD and 2 servos connected to joysrick [duplicate]

Im trying to find a way to run two codes from the one arduino me being an absolute begginer doesnt even know where to start the DHT11 thermometer is connected to a LCD showing temperature and humidity ...
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1answer
99 views

Drawing a bar graph in a LCD

I'm getting my first steps on Arduino and I'm trying to do an exercise where I have to draw a graph bar in a 16x2 LCD that indicates the values read from a vector of 16 integer elements amplified by ...
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1answer
88 views

Arduino if, else if conditions being overlooked [duplicate]

Hi Im very new to coding and I'm struggling to fix a problem. I want the user to input a yes or no answer to a question and based on the answer I want the right text to show on the serial monitor and ...
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0answers
250 views

ST7920 and u8g2 only using some of a 128x64 display

I am trying to use the u8g2 library and an Arduino Mega to control an LCD display. Adapting HelloWorld from the examples included in the library to use the SPI ports of the Mega (50-52), I have the ...
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2answers
365 views

Multiple Push buttons to one input

So I am trying to use one input to control an LCD display. The goal being that once one of the buttons is pressed it delivers a message. I have watched quite a few tutorials and can get the program to ...
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1answer
65 views

Arduino ESP32F-TFT-1.44 Driver

Datasheet https://github.com/espressif/esp-hosted/files/5190376/ESP-32F.pdf The below code is not working. I can see only White screen #include <Adafruit_GFX.h> // Core graphics library #...
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1answer
45 views

I want a bar type display for my Arduino Project

I am trying to make a smart table project. But I have stumbled upon one problem, that is I don't know which display should I use. I need a display that has roughly aspect ratio of 2:1 but also has a ...
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1answer
53 views

LCD Custom Character

I am experimenting the write((byte)num) function, and I stumble upon a pre-made custom character. Usually it's on above ((byte)200) or and below ((byte)10000). If anyone else know this, where could I ...
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295 views

How to use LCD display HD44780 with arduino without using any library

My professor wants me to implement a display to an old project prototype we had laying around on the lab. But he wants me NOT to use LiquidCrystal.h library or any other to achieve that. I read ...
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2answers
96 views

How to convert my Arduino setup to a PIC setup?

I have an arduino setup with LCD, RTC, EEPROM, Reed Switch, AC/DC Buck Converter, 4X4 Keypad. What PIC IC will let me connect with all these(40 Pins), and yet accept Arduino Code. I don't want to ...
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112 views

How do I make my LCD screen scroll text while allowing for button input?

Here's what I want my code to do: This is part of a tea infusing project that would automate the steeping of tea, part of this is initially having a selection of either Black/Herbal tea or White/Green ...
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184 views

ST7735s 1.8" SPI 128x160 TFT Module - White Screen

I am having an issue in my 1.8" TFT LCD module with SPI interface in Arduino Nano. I keep seeing the white screen on my tft. I have made the following connections using Jumper cables: RST --- ...
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2answers
426 views

How can I get my LCD display to display Chinese and Japanese characters?

I'm making a project that requires me to display Chinese and Japanese characters on an LCD. However, the 16x2 LCD display I have does not seem to support displaying Chinese and Japanese characters. If ...
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3answers
476 views

using a switch case with a 5-position switch and serial output

I'm trying to get started on developing a menu system for my LCD1602. I have a Parallax 5-position switch (up,down,left,right,center) and I would like to interface the two. I've been trying to get ...
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0answers
88 views

I2C LCD displaying gibberish

I have connected a I2C LCD with my NodeMCU v3. My pin configuration is as follows: Node MCU ---> I2C LCD GND GND 3V VIN SDA D2 SCL D1 I have been testing a ...
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1answer
86 views

Liquid Crystal LCD and serial monitor not playing well together

On my Arduino Uno, when I'm not using the serial everything seems in order: #include <LiquidCrystal.h> LiquidCrystal lcd(1, 2, 4, 5, 6, 7); void setup() { // put your setup code here, to ...
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1answer
140 views

Implement two processes at the same time

I am a beginner in arduino and due to the lockdown I have been learning it by implementing it on tinkercad. I have made a simulation where I have attached : Servo Motor Ultrasonic Sensor Led Bulb ...

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