LCD stands for "Liquid Crystal Display" and is commonly known as a screen. They are found in all flat-screen monitors and televisions. They can make many colors and shapes, but are hard to control. (Note: LED displays still are LCDs with LEDs as a backlight.)
0
votes
1answer
21 views
LCD not working with Arduino Uno
I am a new learner on Arduino. I am trying to learn how to control the LCD. I looked in the article, "Hello World!", and followed the instructions but it did not work (I checked it many times). The ...
0
votes
1answer
28 views
Arduino LiquidCrystal_I2C fast overwritting
I have an arduino board connected to 2 temperature sensors, 2 switch buttons and 1 lcd display.
When the switch button changes to off, "off" is printed on the lcd display. When the button state is ...
1
vote
1answer
34 views
troubleshoot arduino led 16 x 2 shield
I tried to assemble Adafruit's Arduino LCD 16 x 2 using instructions here without any success.
After assembly, I uploaded the hello world example sketch into the arduino. The shield doesn't seem to ...
1
vote
1answer
41 views
Serial Not Working With I2C
I have been working on a hydroponic garden that is controlled with Arduinos. I have everything working except for the user interface. What I would like to do is have an LCD screen paired with a rotary ...
2
votes
0answers
33 views
RePaper 2.7" eInk Display with Arduino Due
I got a RePaper 2.7' eInk display that unfortunately doesn't supports Arduino Mega because of its limited SRAM capacity (8k bytes). I am porting the library for Arduino Due because its sufficient RAM ...
1
vote
0answers
24 views
Arduino ethernet shield error
As I mention in the title, that when I am trying to upload the code of WebServer to the Ethernet Shield it shows me an error messages. Please if any one can help me to fix it, and here is the ...
1
vote
1answer
36 views
NewliquidCrystal example HelloWorld_i2c just flickers
I've bought a cheap I2C LCD display (specs in the end of this question).
I can't make it print. I've tested with two displays of same model, so nothing is broken.
I am using the NewliquidCrystal ...
0
votes
1answer
25 views
LCDs measuring volts arduino
How do we measure 100 Volts Arduino LCD Proje
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
int analogInput = 0;
float vout = 0.0;
float vin = 0.0;
float R1 = 100000.0; // ...
1
vote
1answer
28 views
Manual reset is required on power on
I am powering a UNO through the 5V pin. I am using a tftlcd shield (2.8" mcufriend.com) on it.
To be able to use the shield with I2C I had to snip the RST leg from the shield. That was done because ...
0
votes
0answers
32 views
LCD is not printing strings, only integers with Arduino
As mentioned in the title I'm facing a problem in printing strings in the LCD. It's printing actually weird characters.
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
void ...
6
votes
1answer
87 views
Does a graphical driver chip exist for this project?
I need some expert advice. I'm using an Arduino Leonardo, which I have got working with a Nokia 3310 monochrome screen. I wrote some code to draw any graphics to the screen.
What I want to know is, ...
0
votes
2answers
64 views
Bad LCD? Bad microcontroller? Or what?
So I recently bought an Arduino along with an LCD module and two extra ATmega328P-PU ICs. Yesterday it was working just fine then I disconnected everything and reconnected it and this happened.
What ...
-1
votes
1answer
79 views
3.95 TFT LCD SPI or parallel interface
I would like to get one information about this TFT LCD module . This particular module works with parallel interface with arduino mega and uno.
I am trying to get rid of arduino in my project and use ...
0
votes
1answer
59 views
How to display information from a web API on an LCD (2x16) in real time?
How can I display information from a web API on an LCD (2x16)?
This is an example of the data returned by the API for train times.
The information that I want to display on the LCD is time ...
0
votes
2answers
86 views
Print string and integer LCD
How do I print a string and integer on an LCD? Here is what I have tried:
int number = 2;
int result = (number + number);
lcd.print(number, DEC + " plus " + number, DEC + " equals " + result, DEC);
...
1
vote
2answers
72 views
Arduino nokia 5110 lcd screen problem
Hello I have a nokia 5110 lcd display connected to my Arduino. I have looked at so many tutorials and none of them work for me. I am trying to get a bitmap displayed in the screen but only the lights ...
5
votes
2answers
144 views
I2C LCD displaying weird characters
I have connected an LCD with an I2C backpack to my Arduino Uno but it prints the wrong characters. The weird thing is that it worked fine for a while and when I updated the code (but didn't change ...
1
vote
1answer
70 views
Nokia 5110 Screen Pixel by Pixel
I have got this LCD screen
I'd like to be able to decide every pixel status of the screen. Do I need to work directly with the buffer or is there another method?
4
votes
0answers
356 views
3.95 MCU Friend Arduino TFT LCD flickering
I got the 3.95" LCD from aliexpress which uses IL9488. I used the MCUFRIEND_kbv library. I am using an Arduino Mega as I need other GPIO to be used for other purposes. I can't use the Uno because of ...
0
votes
0answers
15 views
How to drive a 4bit GLCD?
i've got a huge (about 6 x 23 cm) graphics LCD. I used my multimeter and the datasheet the LCD driver chips (6 x KS0104 and 2 x KS0103) to get the pinout. It has the following pins: GND, M, FCS (not ...
5
votes
2answers
161 views
Arduino DC motor causes disturbance. What can cause it?
I tried to fix this problem the whole weekend but, after no success I decided to post it here. I would really appreciate any help.
The problem
The Wi-Fi module activates the DC motor and lets it run ...
0
votes
1answer
54 views
Message received with 1 character less
I have the following situation:
One Arduino Uno with a 433mhz transmitter wired to the laptop to have serial communication. Another Arduino Uno with a 9V battery wired with a 433mhz receiver and an ...
0
votes
1answer
100 views
Arduino Mega, ST7920 using COSA
I am trying to learn and understand the COSA Library using a 12864ZW (ST7920) 128X64 LCD Display. Right now I am able to use the LCD using the u8glib but also found that COSA has a library for the ...
0
votes
0answers
101 views
Arduino is freezing after 10-15 minutes
I am having a problem with my Arduino freezing after a small amount of time. I'm using an RTC DS1307 breakout to keep track of the time and display the time on an LCD. It displays hours, minutes and ...
1
vote
1answer
50 views
LM35 and Character LCD
I have an arduino pro mini and I have attached a 16x2 character LCD and an LM35 analog temperature sensor. When I upload a sketch using only the sensor and send the readings to serial monitor, the ...
1
vote
2answers
249 views
Problems with Draw Loop using u8glib
I am using an Arduino Mega and a 12864ZW LCD with the u8glib library and the following code to draw to the LCD:
U8GLIB_ST7920_128X64 Display(LCD_E_PIN, LCD_RW_PIN, LCD_RS_PIN, U8G_PIN_NONE);
void ...
2
votes
4answers
995 views
Weird problem with LCD 16*02 I2C shield
I have an I2C LCD screen provided with a Sunfounder kit and certainly built by DFRobot or such a constructor (there is nothing written on the LCD), and an Arduino Uno R3 copy.
My issue is when I use ...
1
vote
1answer
41 views
Arduino using LCD
I am building a project that is using A12864ZW 128X64 LCD, the question I have is should there be anything in the circuit to prevent damage to the Arduino Mega or the LCD? I am using this example here ...
0
votes
1answer
55 views
LCD Pin Numbering vs I2C Controller Pin Numbering vs Sketch
I've been playing with an Arduino Uno, trying to get a 16x2 LCD screen to work with an I2C controller. I've got this LCD screen and this controller. And I've been trying to get the sketch below to ...
1
vote
2answers
91 views
Instead of 1 and 0, make display say On or Off
So for my project, I am making a button that turns on and off an LED, but also display the state of the led on an LCD and by Serial. But my issue is, I don't want it to just show a 0 or a 1, I want ...
-1
votes
1answer
96 views
Interfacing Arduino UNO with TFT LCD and WiFi Shield
I'm trying to interface my Arduino UNO with both a 1) TFT LCD screen and 2) WiFi Breakout board/shield.
The WiFi breakout board uses many of the same Digital pins as the LCD screen so is it possible ...
1
vote
1answer
121 views
What could make an LCD stop working permanently after being connected for 5 seconds to Arduino?
I was using a 20x4 LCD connected to Arduino Uno via a common I2C adapter board. Everything was working perfectly, including the LCD. I had it running like this for a couple of days without any ...
1
vote
1answer
87 views
Can I access individual pixels on my 16x2 LCD display
I have a generic 16x2 LCD display connected to my Arduino. I can use the standard LCD library to display characters, but are there way to turn on and of individual pixels?
1
vote
1answer
99 views
Why can't I print this text to LCD?
I've been working on this for 4+ hours, and have gotten nowhere.
I have an array of weather conditions, and a number is sent over serial port to indicate which member of the array to print to the ...
0
votes
2answers
103 views
What is the difference between TFT and UTFT? [closed]
So I have googled this question till the 5th page of google's results. No luck
I understand what TFT stands for, that was easy to find. What I would like to know is what are the practical differences ...
0
votes
2answers
40 views
LED cube and 200 mA limitation
I'm new to electronics and have been getting rather into my Arduino. But I don't just like following an instructable to do something. I like to know the math behind it and how it works inside. Now ...
0
votes
1answer
46 views
Arduino Interface with Serial device and LCD display
I want to connect my Arduino UNO to a serial device that once powered displays signature numbers. I want to then display those numbers on an LCD display. I have my 16x2 LCD wired correctly and it ...
1
vote
1answer
839 views
mcufriend 2.4 tft mega 2560
Please help me w/ my 2.4 mcufriend TFT on my Mega2560.
I've followed any instructions I can find, including:
2.4" TFT LCD Shield isn't working on Arduino Mega
I still get a show white ...
1
vote
3answers
343 views
Sending a value from one arduino to another
I wonder if it is possible to send a value from one arduino to another.
Basically, I have one arduino measuring let's say weight, but I want to display that value using an lcd in another arduino.
...
0
votes
1answer
363 views
Why does my LCD display random characters?
I've been struggling with my LCD for hours, and after solving more different issues than I can remember, I'm out of ideas for this one.
My LCD is showing random characters, see the picture below (the ...
2
votes
0answers
134 views
Serial does not work when LiquidCrystal library is used
I have been struggling with a LCD for 6 hours straight - I've had many problems including random characters showing up, and this time (not quite sure what changed, I tried so many things) as soon as I ...
0
votes
1answer
164 views
10k ohm Potentiometer vs 10k ohm Resistor on LCD Display
I'm trying to use a LCD Display with my Arduino, but I don't have a potentiometer and all of the guides I find always require one, usually a 10k ohm potentiometer.
The point is that I'm not very good ...
0
votes
0answers
46 views
Output to LCD is sometimes shifted to the side
I have an Arduino Uno connected to a LCD. When I try to write to it using the LCD library and the following sketch, it will keep shifting the output around, sometimes drastically.
The sketch:
...
0
votes
1answer
113 views
How would i capture and split serial data?
How would i capture the following serial data, and split it into parts?
<Alarm,MPos:0.000,0.000,0.000,WPos:0.000,0.000,0.000>
the parts i need from this is
Alarm - This is a state. i.e Alarm, ...
1
vote
1answer
57 views
Cheap LCD with Few Pins
I am working on a project with an Arduino Nano that includes a keypad, screen, and the NRF4001 transceiver. The keypad requires 7 digital pins to operate, the wireless transceiver uses pins D9 - D13 ...
0
votes
1answer
132 views
Arduino, lcd 16x2 and UTP cable shows gibberish text?
I'm using an arduino uno, and an 16x2 LCD that is connected to the arduino uno with a 1m long UTP cable to transmit data and as well power the LCD screen.
I used to test my code and my wiring with ...
0
votes
2answers
40 views
Split a string as 2x16 for lcd
How do I split a string into two based on it's length to display on a 2x16 lcd?
I have seen a function called length() to get the length of a string. But, any ideas how to split it in to 2x16 and ...
1
vote
1answer
65 views
Powering arduino and sensors and motor damaging 16x2 LCD?
I have an application that requires reading sensors and moving a stepper motor.
The sensors draw about 200mA between them, and need 5V to work. (Too much to draw through the Arduino, I thought) The ...
1
vote
1answer
170 views
Help with LCD's menu and seeing values continuously
I want to see the voltage data using void volt();, when I go to the "Item2SubItem3" within void menuChanged. Now I can only see the data at that time: how can I refresh the value every second?
void ...
2
votes
1answer
128 views
Arduino LCD Simple Problem
Hi my lcd doesnt display that i was expected. Can anyone help me???
RS-->22
RW-->GROUND
E-->23
D4-->24
D5-->25
D6-->26
D7-->27
#include <LiquidCrystal.h>
LiquidCrystal lcd(22, 23, 24, 25, ...
