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Questions tagged [lcd]

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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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I have a Micro RP2040 board from SB Components. Link to this product With this I also have a 2.4 inch SPI TFT LCD screen with an ST7789 controller Link to the screen, it's on that page just scroll ...
Aadiraj Anil's user avatar
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I'm sorry to ask this, as it has been asked many times, but I can't get the Arduino micro board to recognize my LCD screens. I've tried using two different LCD screens and two different Arduino micros....
Bilal Bahadır Akbulut's user avatar
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I am trying to make a digital die for my project at school. I am having trouble with the programming. I don't really know how to write code and I am not a programmer. I took inspiration from a post on ...
Urban's user avatar
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When I had the code run just the LCD it worked perfectly fine, but when I added an HC-SR04 without changing the text it showed weird characters. All I had the code do with the HC-SR04 was print it in ...
zachlikestech's user avatar
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I'm attempting to print several rows of text, at certain Y-values, on an SSD1306 128x64 LCD display. I'm using the ssd1306 library by Alexey Dynda. I initially wanted to use the more common LCD ...
Runsva's user avatar
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I want to build a speedometer for a car using Arduino UNO. For the display, I'm using an LCD screen that will be located behind the steering wheel. For context, I'm building the speedometer for a ...
cool bean's user avatar
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3 answers
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I am new to arduino and I am wondering if it is possible to store image data on my computer and send it to my arduino over the USB cable (which is also used for power) to display on a TFT LCD display ...
Clinterpottrmus's user avatar
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my results are here. 0 press--"a" 1st press--"b" 2nd press--"c" 3rd press-- still showing "c" When button pressed 3rd time, It must be repeated to show "a&...
hfsrg's user avatar
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I'm using an Arduino (Nano 33 IoT) board for a project and apparently this board can only supply with 3.3 volts when a 9V battery is connected to it through Vin and GND pins. In other words, I'm ...
Yosor Shishakli's user avatar
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I have a NodeMCU esp32-s board and I'm trying to connect My 16x2 lcd with PCF8574T I2C bus to the esp32 , the problem is that the lcd doesn't show anything and the WireScan sketch can't recognize the ...
kamal MKA's user avatar
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I have a problem with lcd, I have NUCLEO64 L746RG , I have Lcd Display and I2C connected to it. When I verify code it gives me and long error and I can not find the solution or cause of this error: ...
kristian311's user avatar
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This was supposed to be the code for automatic pet feeder Got it from here1 The problem is that I always got a "No matching function for call to'DS3231 (const uint8_t &, const uint8_t &)&...
AEZAKMI 12's user avatar
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I'm new to Arduino and want to build a Button Box. When I buyed the parts I didn't watched out for the specifications of the I2C module. When I tried to print sth on the LCD nothing happened (in retro ...
Chritzeltopf's user avatar
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I am making a project where if the push button is pressed, the LCD screen will show a message. But with many trial and errors, it doesn't give the right result. Here is the circuit: Here is the code: ...
James's user avatar
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I wanted to use an SD shield on an Arduino Elegoo to make a typewriter (for saving files). I put the shield on the Arduino Elegoo, then connected an LCD screen, then tried to power on using USB to ...
dragonitebrian1024's user avatar
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I recently got the Adafruit gfx 2.8" display, which works fine. It's quite obvious that it requires almost all of the pins on the UNO. However, I don't understand what are the 18 avaliable "...
Cohen's user avatar
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I am making a hydroponic nutrient monitoring system using Arduino Uno, Atlas Scientific EC sensor, pH sensor, and RTD (temperature) sensor in I2C mode. I also want to use LCD 20x04 to display the ...
Angela Radityatama's user avatar
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Im using <LiquidCrystal.h> arduino library,on a 2x16 LCD screen, with an accelerometer. I'd like to flip the the text when my x value exceeds N value. I get how to output text. I tried straight ...
j0h's user avatar
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Here my sample code for an Arduino Leonardo-based custom board: #include <LiquidCrystal.h> const int rs = 3, en = 0, d4 = 4, d5 = 30, d6 = 12, d7 = 6; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); ...
Mark's user avatar
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3 votes
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I'm getting the error "Current through backlight led is 23.7 kA, while maximum is 20.0 mA". What am I doing wrong? #include <LiquidCrystal.h> LiquidCrystal lcd(1, 2, 4, 5, 6, 7); ...
YD8877's user avatar
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This is the code. The /// are where I added the countdown. Unfortunately the countdown only goes down 9 seconds. What I want it to do is go down the full 24 hours. I have been trying to fix this error ...
alexlikesallthegamez's user avatar
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See bottom for solution. I am trying to run the Arduino LiquidCrystal library example HelloWorld.ino on an ESP32. It seems like it never even executes the Setup() loop. The ESP resets after eight ...
Rudy's user avatar
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I have a Arduino Mega with LCD TFT 2.4"" with reading 5v signal on A8 pin (Arduino mega pin) from a raspberry pi (just to test). They are grounded together. When the Arduino is without the ...
Gabriel Lincoln's user avatar
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2 votes
2 answers
3k views

Recently I've been working on an automatic dog feeder dispenser (that dispenses by turning a screw attached to a stepper motor). Currently I have a Nema 17 connected to an L298N stepper driver which ...
Carter's user avatar
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2 votes
1 answer
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I am trying to use Topway display for HMI lcd with Arduino. This display using RS232C protocol at docs it has a "Communication Packet Structure" like this. So my query should start with AA ...
mehmet's user avatar
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