LCD stands for "Liquid Crystal Display" and is commonly known as a screen. The tag should be used for questions related to LCD display.
-1
votes
1answer
16 views
How should I initialize a RepRap Discount 12864 on u8glib?
I was taking the advantage of an existing piece of hardware (RepRapDiscount Full Graphic Smart Controller) for my present project.
Here is a link for the RepRap wiki about the controller
#define ...
0
votes
1answer
28 views
Weird characters at the end of LCD
I have written a simple sketch that displays temperature and humidity on a 16x2 LCD. Here's its output:
Temp: 28▒▒
Humidity: 68▒▒
The library I used for DHT11 sensor is not from Adafruit. This is ...
0
votes
1answer
32 views
How to connect to pins when using I2C LCD shield?
How are pins used with this shield? The tutorial says that the header pins are inserted into the Arduino but the guide says they are not used for signals. Is there any way of using the other pins?
...
-1
votes
1answer
53 views
How to connect a calculator's LCD to Arduino?
What I have done:
I have opened an 8-digit calculator and got an LCD screen, which has 28 pins and I don't know how to connect it to the Arduino.I don't know anything about its pins because there is ...
0
votes
1answer
52 views
conflict I2C with 2
hi i have some trouble to connect my 2 arduino nano with i2c standard,
i have this configuration
SLAVE RECEIVER nano with DS1037 i2c and LCD 16x02 i2c
MASTER SENDER nano .
After some time the SLAVE ...
0
votes
1answer
24 views
Wiring a potentiometer to control a 9V battery powering 2 LEDs in series
I am trying to build an array of LEDs where their brightness is controlled by a potentiometer. The LCD will display the percentage of brightness based on the potentiometer. I am able to successfully ...
0
votes
2answers
53 views
Why adding a LED between Pin 3 and Ground causes LCD display not to show text?
For a project of mine I am programming an Arduino UNO to show information I get from some sensors on an LCD display.
As a first step I setup Arduino to show "Hello, world!" on the LCD, which worked.
...
1
vote
1answer
38 views
Arduino LCD is displaying gibberish, sometimes
Below is my code and a picture of the gibberish. It's different every time. If i pull out the temp sensor, i still get gibberish, sometimes. I'm at a loss as to what to even be looking at now. Any ...
0
votes
0answers
36 views
rc522 RFID reader will only accept first tag after power up
I have an interesting problem using the Mifare rc522 device similar to http://www.ebay.com/itm/201415107836
I have this device connected to an arduino uno and drawing power from the 5V supply.
It ...
0
votes
1answer
12 views
matlab+arduino+lcd
I am trying to send some integer to lcd.But it is not working.I have tried it in Proteus.Please help....I have uploaded matlab and arduino codes below....
matlab code
clear all
clc
answer=...
0
votes
0answers
107 views
Using a TFT LCD with an ESP32 Thing
So I've got an ESP32 Thing from SparkFun (https://www.sparkfun.com/products/13907) here, and for the life of me I can't figure out how to use my TFT LCD with it. I was hoping to make a desk clock or ...
0
votes
0answers
37 views
Character won't show up on LCD display
When tried to hookup an LCD to arduino mega using the following 2 sketches.
Even though no characters show up on display.
#include "U8glib.h"
U8GLIB_ST7920_128X64_4X u8g(10);
// setup u8g object, ...
2
votes
1answer
24 views
LCD5110 - How to make Direct Draw via 2D-array of boolean?
How to draw 2D-array directly on LCD 5110 (PCD8544)?
I have tried libraries like AdaFruit and several others.
But I need draw there via pixel 2D-array, something like this:
bool picture[48][84] = {
...
0
votes
1answer
24 views
Arduino pins LCD and motor controller
I am using L298N motor control. And also i want to use my 2*16 LCD. can i use the code like this?
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the ...
0
votes
2answers
43 views
LCD from Arduino Starter Kit not displaying text
I've been tinkering with my new Arduino a bit and I was adding an LCD from the starter kit, using information from the eleventh project in the project book, "Crystal Ball." When I connect the Arduino ...
-1
votes
2answers
148 views
I keep on getting a stray '\302' in program error.How do I fix it.This is in arduino uno
#include <LiquidCrystal.h>
int trigPin = 13; //sensor's trigger pin connected to pin 13
int echoPin = 7; //sensor's echo pin connected to pin 11
float pingTime; //time for the ping to hit ...
0
votes
0answers
33 views
Due to Some reasons Timer base music system has been stopped
Due to some reasons my system goes to stop. I could not find this problem so please help me with it.
I am making a timer based music system. I am using two Arduino boards which communicate with each ...
1
vote
1answer
33 views
LCD Shield and Arduino
I am trying to use a load cell (https://www.sparkfun.com/products/13331?_ga=1.55586472.2060096590.1479826091) and an HX711 chip with an arduino and LCD shield to display weight values on the LCD ...
1
vote
2answers
44 views
How to I press a button once to display text and again to remove it?
My code is displaying voltage and I want to have a button that when pressed it displays a text and when I pressed it again it would turn off the text. I put the word "YES" just for a test
float vPow =...
1
vote
1answer
50 views
Debug soldered connections of LCD 1602A
I am moving my first steps into Arduino and electronics and I have tried to program an LCD 1602A display following this tutorial.
I managed to complete the tutorial up to setting up the contrasts of ...
0
votes
1answer
26 views
Lcd display shield, no characters
So, I've been trying to make an Lcd display shield I got from ebay to work with arduino. Using this very simple code:
#include <LiquidCrystal.h>
#define RSPin 8
#define EnablePin 9
#define DS4 ...
-5
votes
1answer
38 views
No display on LCD
#include <Wire.h>
#include <LiquidCrystal.h>
#define sensor1 x = 9
#define sensor2 y = 8
#define colx 8
int sensor1,sensor2;
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
void setup()
{
...
0
votes
2answers
76 views
Arduino calculator: I'm struggling to write a sketch which parses inputted characters [closed]
I am attempting to make a calculator with arduino using a 16x2 Text-LCD and a 4x4 keypad. I've already programmed the part where the arduino board gets input from the keypad and displays characters on ...
1
vote
2answers
78 views
How to switch on and off an HD44780 LCD Display?
I have an LCD Display HD44780 model and I was reading his datasheets
I saw the it has the functionality to be switched on/off as stated:
Display on/off control: D = 0; Display off // C = 0; Cursor ...
0
votes
3answers
49 views
Use TFT LCD with Uno and Wi-Fi shield
I need to work with Arduino Uno, LCD and Wi-Fi shield.
I was wondering whether I can use the LCD in the link, 2.2" TFT Display - Test the Display with the Uno and Wi-Fi shield - and how to search ...
2
votes
1answer
69 views
How do I change the I2C address on the LCD backpack?
The 20 x 4 LCD comes with a I2C backpack. I know it has A0, A1, A2 to set the address, as shown at the bottom here: https://tronixlabs.com.au/news/tutorial-serial-i2c-backpack-for-hd44780compatible-...
1
vote
1answer
105 views
How to add toggle button for LCD display text and backlight
I have set up BMP180 and DHT11 to display data on HD44780 20x4 LCD,
I want to be able to toggle the altitude meters to feet and temperature fro degree celsius to Fahrenheit and pressure from ...
0
votes
1answer
62 views
20x4 LCD will write but then won't update
I am controlling a solar tracker, and it needs to be reset every 10 minutes or it loses its mind. My program works fine, controlling power relays, so I have added I2C&Power to be able to see the ...
0
votes
2answers
95 views
Controling pump while displaying moisture value on a LCD at the same time with soil moisture sensor?
I'm new with Arduino (and I'm not very good at English). Recently with Arduino Nano I have tested:
Control water pump based on soil moisture (using relay) (1)
Display soil moiture (in percent) on a ...
1
vote
2answers
41 views
Use interrupts with analog pins in arduino or another possible solution?
I have a very simple circuit, but my program is some what complicated.
Here is the circuit diagram:
Here is the code:
/*
01 - GND -------- GND
02 - +5V -------- 5V
03 - V0 -------- ...
1
vote
1answer
31 views
lcd has no contrast pin
i just bought this lcd. I connected all pins as discripted on this datasheet (Page 8). However i noticed that there is no pin to control the contrast. I also didin't get the display to run yet.
Might ...
0
votes
1answer
37 views
lcd not doing anything
I just bought an LCD. I connected everything as explained in this sheet.
This is the code I am using :
#define RST 3
#define CE 2
#define DC 4
#define DIN 6
#define CLK 5
void LcdWriteCmd(byte cmd)
...
0
votes
1answer
38 views
VLcd pin to ground?
I just bought an ERC12864-655 LCD screen.
On the datasheet it says that I need to connect the vlcd pin to GND.
However in this (page 8) datasheet it says that vlcd is the main power supply. As far ...
-3
votes
1answer
51 views
What is LCD bias voltage and where do I have to connect it?
I noticed that I have VB0+, VB0-, VB1+ and VB1- pins on my LCD. In the datasheet it says they are for the "LCD Bias Voltage". I have never heard about that. So what is it? Where do I have to connect ...
1
vote
1answer
105 views
Arduino Text Scrolling on 16x02 I2c on NodeMcu (ESP8266-12)
I have managed to get my 1602 I2C LCD working on a NodeMCU devkit. I can display text parsed from the web but I am not sure how to set it to autroscroll if message is greater than 16 characters. I ...
-3
votes
1answer
48 views
Where can I get high-quality LCD's for projects [closed]
So I've recently started learning about LCD communication with arduino but I have one question: Devices like PC's and smartphones use very high quality LCD's and if I wanted to use one (not ...
1
vote
1answer
113 views
Arduino Uno with Camera and LCD
I would like to ask you if I can display real time view from Camera in Arduino Uno with LCD.
I have that components:
Camera OV7670 VGA 0.3 MPX
LCD TFT 2.4 SPI ILI9341
Arduino Uno R3
On a website: ...
4
votes
2answers
264 views
ATTiny85 I2C LCD
My setup is as follows:
Arduino IDE 1.6.11
Arduino Pro Mini as ISP
ATTiny85 1602A LCD with I2C board
The libraries I use are:
TinyWireM (source: https://github.com/adafruit/TinyWireM)
...
1
vote
3answers
83 views
FreqMeasure.h uncompatible with my code problem
I have written code to read temperatures on a motor which also has pulse feedback to see speed, (one hall sensor) and my previous version of the code does work fine, however when i add example ...
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votes
1answer
44 views
Printing on LCD screen in different languages
I need to write to an arduino LCD screen in different languages like Japanese or Chinese.
Someone knows how?
3
votes
2answers
143 views
LCD 16x2 Blank Display
I am using the following wiring diagram from a tutorial. I need to follow this configuration because later tutorials build on this example. I have looked at other solutions, but they follow a ...
-1
votes
1answer
64 views
DIY Arduino technical difficulties
I followed this ArduinoToBreadboard and I just added a 5V regulator just to be on the safe side.
So my questions are:
When I connect a Nokia LCD 5110 to the DIY arduino, nothing really happens but ...
2
votes
2answers
68 views
Arduino Wire.h send double to lcd
I'd like the double number 200.00 shown as 200.00 on my LCD screen.
For instance, when I pass just a number (int) like 40 to the LCD, it uses it as an ASCII code to show a character on the display.
...
0
votes
1answer
51 views
Sending LCD commands to a slave micro
I need to split up code which I've already developed for one micro into two different Arduinos connected by serial. The "remote" micro is directly connected to a 20x4 character LCD and the main micro ...
0
votes
2answers
135 views
Arduino Wire.h library how to communicate with an LCD
I am having an Arduino Uno and an C2042A LCD with I2C shield on it. Because the virtualwire library does not work for me I tried only the wire library but it's still not working:
My Code:
#include &...
1
vote
4answers
114 views
Why do my temperature sensor values become inconsistent when additional hardware is added to the board?
I have this strange problem. My TMP 36 sensor works fine when it is the only thing connected to my Arduino Uno board. The voltage measurements, and thus the temperature, are accurate and consistent. ...
0
votes
1answer
49 views
Arduino Mega LCD
I am interfacing an LCD with an Arduino. Sometimes it shows nothing after uploading the program. What should I do?
0
votes
1answer
61 views
Arduino which library for led 4x20
I am having an Arduino Uno and I want to add a LCD to it. My LCD is a C2042A with I2C shield on it. I tried the LiquidCrystal_I2C library but it doesnt work. I am not getting any errors the LCD is ...
0
votes
2answers
175 views
Can't display text on LCD 1602
Today I tried to display some text with my Arduino UNO and a LCD 1602A screen. I did find some schemas online, but I cannot get any character or "black boxes" on the display.
I connect wires like ...
1
vote
1answer
209 views
Connecting multiple TFT panels to Arduino Uno via SPI?
Is it possible to connect more than one TFT screen (like this one or similar: https://www.adafruit.com/products/1651) to an Arduino Uno?
I'm wanting to connect and control two color screens at once; ...
