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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1answer
421 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. ...
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1answer
478 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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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
632 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
4k 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
965 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
2k 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
898 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 ...
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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
14k 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
562 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 ...
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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
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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
80k 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
344 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
22k 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
985 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 ...
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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 ...
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1answer
565 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
9k 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
29k 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
6k 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 ...
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2answers
4k views

LCD scrolling down problem

I have a list of set-ups and I only have 2 rows in the lcd , I'm trying to scroll down for the moment and I'm doing this by changing the row in the setcursor function to either 0 or 1. However since ...
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2answers
3k views

SMPTE Timecode Reader with LCD display coding question

I've managed to adapt some code from the Arduino forums to display timecode on an LCD display. What I would like some extra help with is first is there a way of defining the one_time_max etc ...
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1answer
361 views

Can I link another device to the Uno's clock?

I'm trying to use an unusual 16x2 LCD display with my Uno. As far as I know, it's an EA-X16027AR. It doesn't seem to be compatible with the HD44780 driver, which is typically used for Arduino LCD's. ...
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3answers
2k views

Is there a color LCD display for an arduino?

I currently have a Mega2560 with the LCD4884 Shield. The Shield is good for putting out text and simple pixel images. But I am wondering if there is something that has a full range of colours that ...

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