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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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Powering LCD Displays without a Breadboard

I hope that this is not a silly question. I may be hoplelessly optimistic in asking, but is there any way to power & display information onto a LCD Display from an Arduino Uno.... Without the ...
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1answer
1k views

How to accept user input (array, variables,…)

I am working on a project using my Arduino mega2560 that triggers a solenoid (maximum of three solenoids), my camera and my flash (maximum of two flashes). The core routine is there, and working. ...
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2answers
176 views

Which Microcontroller to use

I want to use a wifi shield, as well as a 2.8 inch touch LCD shield; both would fit the arduino uno V3 nicely. Is that the best microcontroller to use
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0answers
188 views

Why does avrdude error appear when interfacing GLCD with arduino uno in ubuntu

I want to interface a GLCD with arduino uno. The GLCD is JHD12864E. The connections are as shown in this image I downloaded the OpenGLCD library and uploaded HelloWorld program from it. I got ...
3
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1answer
82 views

Value of the counter collide on my lcd while decreasing. How can I remove it?

#include <LiquidCrystal.h> LiquidCrystal lcd(12,11,5,4,3,2); int visitor=0; //variable for counting visitor number unsigned long timer_1,timer_2; //variables for recording time for ir_1 and ...
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3answers
963 views

Arduino Uno + Wifi Shield + PS2 Keyboard + LCD Display

I'm new in the Arduino Community and I'm facing a problem when I try to use a PS2 Keyboard and an LCD Display (16x2) on an Arduino Uno with a Wifi shield. I would like to write something with the ...
3
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1answer
861 views

Problem with LCD keypad shield and Arduino Uno R3

I have a problem with powering my LCD Keypad Shield from a DC cable (4 AA batteries or 9V battery). Everything looks good, but the LCD screen doesn't display anything. When I used a USB cable, the ...
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2answers
1k views

Simple word translator, return error: invalid array assignment

I know this is not a good question. But I am clueless with this error : invalid array assignment (at function convert). For extra information, I involved a lot of copying/pasting programs I haven't ...
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1answer
1k views

How to change input pin of FreqCounter Arduino Uno/Dumilanove library?

The following link to the library defines arduino pin 5 for input pin for signal. https://www.pjrc.com/teensy/td_libs_FreqCount.html But the problem is I'm using an 16x2 LCD display with the ...
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3answers
1k views

Arduino board to control microwave oven?

So I've taken apart an old microwave oven with a touch-sensitive LCD screen. I understand that I could die from playing around with this, so I've disconnected the high-voltage transformer and the ...
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7answers
45k views

I2C LCD Serial Interface Board not displaying text (wrong pins?)

I have a 1602 LCD screen that works fine on its own. However I wanted to free some pins by using an I2C / IIC LCD controller I purchased separately. While the controller seems to be communicating ...
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1answer
1k views

DS1307 RTC conflicts with DS18B20

I'm working on a project to output the temperature from a DS18B20 to a 16x2 LCD while logging the temperature to a CSV file using the Adafruit Data Logging Shield. I keep getting this error when ...
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4answers
593 views

Determining contrast on LCD

So I am using this code here and I do get text written on my LCD screen. Problem is that text is almost invisible. I tried with background light on or off and it did not help. LCD is connected to 5v ...
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2answers
1k views

Arduino LCD Display drawing image issue

I am playing with 3,5" (400x240) TFT display which is placed into Arduino Mega 2560 R3 board. My final goal is taking .raw data from SD card and drawing it on display. What I have done so far: - My ...
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0answers
867 views

3.5 inch TFT LCD connection diagram with mega r3

Forum post I would like to ask if someone has this shield fully working. My biggest problem is the touch screen that i couldn't manage to make it work. Here is the code i am using: // ic:ili9327 ...
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1answer
2k views

lcd.print and 2D arrays

Click here to see my program running I have created a 2D array (see my full code below), and each row contains one state of a battery here is a schematic : row [0] : "▯▢▢▷" // this row represents ...
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0answers
407 views

Connect Lilypad to LCD

I am trying to connect an LCD panel (RioRand (TM) IIC/I2C/TWI Serial 2004 20x4 LCD Module Shield For Arduino UNO MEGA R30) to a Lilypad Arduino. How can I get them to talk to each other? I cannot ...
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2answers
3k views

Change the backlight of 2x16 LCD

Today I ordered a 2x16 character LCD with white characters on black background. Now I am wondering if I can change the backlight LED, which I guess is white for the characters, with a RGB LED to ...
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2answers
944 views

Is my TFT screen defective?

I bought the standard 1.77" TFT screen months ago and It has never worked. I follow the wiring diagram shown for Uno on the guide on the Arduino website and the best result I have ever got is it ...
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1answer
571 views

Can the Arduino use this i2c LCD Panel

Can the Arduino Mega2560 use the New Haven NHD-0420D3Z-NSW-BBW-V3 LCD panel by controlling it with the New LiquidCrystal library? What cable will you use to connect the LCD to Arduino, are there screw ...
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3answers
9k views

Sainsmart LCD 2004 - LiquidCrytal_I2C library issue unable to compile

I bought a Sainsmart LCD2004 from Amazon to use with my Arduino Uno. I understand that since this LCD uses I2C a new library needs to be downloaded. From the sainsmart website I dowloaded the LCD ...
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1answer
390 views

Arduino Nano and a 3.3v Ethernet shield

I plan on purchasing a Nano clone, an Ethernet shield (ENC28J60), an LCD and a DHT22 humidity + temperature sensor. This will be used in a wine cellar to monitor relative humidity and temperature. ...
0
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1answer
456 views

Stack arduino, motor shield and lcd shield

I made arduino-stack which consists of arduino r3, robotdf motor shild and robotdf lcd shield. But motor shield and lcd use same pins 4 and 5, so we have a conflict of pins. Can i use other pins?
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2answers
1k views

How to display tilt sensor data on an LCD?

I'd like for a 16x2 LCD monitor from Sparkfun to display sensor data from a 4-directional tilt sensor from Parallax. The Arduino board is a Duemillanove. The board will run and power both programs and ...
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1answer
611 views

Adafruit gps breakout module help

I am intending to show the initial, searching for signal..., screen until the location is updated and then show the location on the lcd. However, even after the led on the gps indicates a satellite ...
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2answers
3k views

20x4 LCD shows alternating blank lines

I just acquired a Arduino learning kit, which includes a 20x4 LCD display. I was going to test it, so I grabbed an example "hello world" program from the Arduino docs, connected the display ...
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1answer
879 views

Unusual LCD behaviour

Can someone please tell me what's going on with my LCD screen and how I can fix this issues below? I have the following: Arduino Uno R3 w/ ATMEGA 328P-PU 16x2 LCD TowerPro MicroServo SG90 DPDT Slide ...
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3answers
1k views

Why can't I read anything but Pin 0 of PORTC?

So I am working on this lab for my Embedded Systems class, but I can't seem to read anything but the first bit of PORTC. What's even weirder is that if any of the pins go low the first bit will go to ...
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1answer
841 views

How do I connect this display to an Arduino Uno

I am completely new to this, and a novice when it comes to electronics but I want to learn. Can someone pls tell me how I would connect the display in the photo here with an Arduino Uno (which I have ...
3
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2answers
2k views

Stacking Arduino Shield (Motor Shield, LCD Keypad, LED Sensor)

I'm building a line follower with arduino, here some part that I'm going to use Arduino Uno Motor Shield 2A http://www.dfrobot.com/index.php?route=product/product&product_id=69 LCD Keypad 4 ...
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2answers
13k views

Scroll String Only On Second Line Using 2x16 LCD

I'm trying to scroll a string in the second row of the LCD while letting the string on the first row stay intact. I use Serial to run that part of the code as you can see. It work at first but when I ...
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1answer
493 views

LCD display under power saving mode

To make LCD display, Pro Mini and ATMega2560 to run on one set of battery for months, appreciate idea and comment. Which LCD to use? Which LCD chip controller chip (hide inside the LCD) has better ...
2
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1answer
2k views

Arduino LED backlight - should PWM be used with transistor or capacitor?

I have implemented a PWM controlled LED backlight for the LCD in my Arduino Uno design. One LCD backlight pin is connected to +5V, the second to the ground via 220 Ohm resistor and MOSFET controlled ...
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2answers
2k views

On my lcd my characters collide, how can i remove one(because of the programming)

My code means that when i press a button it displays a word, but by default words are already there and i need to get rid of those default words. #include <LiquidCrystal.h> // initialize the ...
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3answers
89 views

My counting function is not working with the text on my lcd

I want the bottom row of my LCD to display the counting function and include text: lcd.setCursor(0, 1); lcd.print("Launch in"millis()/1000); But it comes out with an error, what part is wrong?
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3answers
61k views

Why is my LCD 16*2 is not displaying any characters, although all the wiring is correct?

Recently I have linked up a typical 16*2 LCD (Liquid Crystal Display) display to my Arduino Uno and have linked all the pins up. Here is my connection:(LCD pin first) 1=GND, 2=+5v, 4=11, 6=12, 11=5, ...
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1answer
2k views

LCD showing weird characters when using two 1-wire temperature sensors

I have a sketch to display a temperature obtained from 1-wire DS18B20 sensors. The sketch works fine, however when I connect two sensors to my board, the text on the LCD displays gets corrupted (### ...
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1answer
332 views

LED's won't light up when LCD/RNG hits 2 || 3 of a kind

I am a true beginner here. Trying to build a "slot machine" type game and am in the beginning stages. Found a RNG for LCD code and tweaked it a bit to get three digits to display randomly. Worked just ...
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1answer
1k views

Leonardo-based tachometer?

I'm new here. I'm not a native speaker, so pardon my English. I just received my Arduino Leonardo today. I tried some basic calculations and stuff like blinking and LCD interfacing. Its interesting. ...
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4answers
21k views

3.5" TFT LCD Display is not working with Arduino Mega 2560 R3

Even I can't do similarly with my 2.4" TFT LCD in here still: 2.4" TFT LCD Shield isn't working on Arduino Mega Now, I have bought 3.5" TFT LCD display for my Arduino Mega 2560 R3 to try ...
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1answer
2k views

Arduino based small LCD screen with camera video capturing

i have a idea to create a small screen which displays video recorded from arduino with camera. so camera will be back side of human and screen will be at near to eye. human can see the pictures from ...
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2answers
822 views

Running an LCD keypad shield from a separate power source

I need to use a motor shield and an LCD keypad shield simultaneously hooked up to a single Arduino Mega Board. Since I can't physically stack them, I decided to reroute all the pins used for the LCD ...
2
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1answer
3k views

I cannot find the I2C device by scanning

I've been trying to get a LCD I bought from deal extreme to work for some time with my ATTiny85 chip. It should be capable. I've tried googling the device but there is no proper documentation, so I ...
2
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1answer
545 views

Are these lcd and motor-shields stackable?

first of all, I'm kindly apologizing for asking such stupid questions, but as my electronic-knowledge is dramatically limited, you are my only hope to get my problem solved. I'm pretty new to Arduino ...
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1answer
8k views

Arduino LCD shows only black boxes

I've hooked up my Arduino on this LCD, and after running the following code, all I see is a row with black boxes and another one empty. //LiquidCrystal d(RS, E, D4, D5, D6, D7); LiquidCrystal lcd(0, ...
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4answers
27k views

2.4" TFT LCD Shield isn't working on Arduino Mega

Even on ebay's website it is mentioned that I can't use 2.4" TFT LCD Shield display on attach to Arduino Mega. The problem is that I bought this shield by mistake. I want to put this shield onto ...
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3answers
1k views

LCDs larger than 20x04 and 5" diagonal

Are there any i2c LCD screens that are larger than 2004 characters and larger than 4.8 x 2.7 x 1.2 inches in dimensions? I have the Sainsmart 2004 LCD but it can't display all the information that I ...
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4answers
3k views

Save some arduino pins when driving a 4 digits 7 segments display

I built a simple clock using a 4 digits 7 segments LCD display. I display one digit at a time, switching on and off very quicky and cycling through digits. Everything is ok, but I used 8 + 4 = 12 ...
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3answers
5k views

What is the point of D0-D3 on LCD?

The Arduino LiquidCrystal library has 4 constructors with different arguments: LiquidCrystal(rs, enable, d4, d5, d6, d7) LiquidCrystal(rs, rw, enable, d4, d5, d6, d7) LiquidCrystal(rs, enable, d0, ...
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2answers
6k views

Changing the brightness on a Hitachi HD44780 LCD screen

I am finishing up a project- an LED game alarm clock. Seeing as this is a clock, I need to have a way to conserve power, which right now my Uno R3+ is eating up like a politician. My question is, how ...