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
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1answer
17 views
Did I fry a Sainsmart 1602LCD (not shield, just LCD), HD44780 compatible
Each new circuit I build, I seem to make every possible mistake, including inverting 5V and ground.
I did that precise mistake on this 2x16 Sainsmart LCD. The backlight definitely works, but is the ...
0
votes
1answer
13 views
Regarding use of software serial two times
Can we configure two digital pins as serial pins using software serial library?
1
vote
3answers
29 views
LCD readout is odd
I want it to display the current temperature in the middle of the screen, fade out for two seconds, display new temperature, rinse repeat. This is current (see images)]2
/*
* File: ...
3
votes
2answers
54 views
Flickering LCD backlight with fingerprint scanner
I have the following problem: for some *** reason, my LCD is flashing when my fingerprint scanner turns on. Here is a video of the behavior: ...
-2
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3answers
33 views
how can we replace a 10k potentiometer with resistors?
I am using a lcd (16 2)with arduino uno r3, in for that I need a 10k POT but I don't have it now. How can I replace that?
I have resistors of many kinds and a 1k potentiometer.
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votes
0answers
24 views
Compiling Error 3 Wire LCD
When this 3 wire LCD code is compiled the following message results:
NewLiquidCrystal-master\I2CIO.cpp:35:26: fatal error: ../Wire/Wire.h: No such file or directory
#include <../Wire/Wire.h> ...
0
votes
1answer
35 views
Wire.h not found newliquidcrystal
The arduino IDE can't seem to find the wire.h file when i'm using the new liquid crystal library. Does anyone know how to solve this? here is the code i'm using and the error message:
/*-----( Import ...
0
votes
0answers
37 views
Arduino Nano - 5V pin drops to 3.3V when load is connected
I have a Nano (with ATmega328) board that I am using along with a GPS module, an LCD and a potentiometer to make a small GPS unit that will tell the location. Long story short, when powered externally ...
1
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0answers
15 views
LED and LCD game
I am making a game where four different colored LEDs are flashing randomly, and when the green LED lights up, the user presses a button. If the user pushes the button when the LED is green, I want my ...
1
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0answers
59 views
Arduino NTP clock glitches every 7 seconds
Please ignore all of the comments, this is basically a Frankenstein program with several different programs combined together.
Basically what happens is the time prints out in seconds like this: 00, ...
0
votes
0answers
28 views
Arduino LCD changing contrast only makes black boxes less readable i.e. less in contrast
I have seen similar issues posted here but none match my problem exactly.
I have a starter kit and a 16x2 LCD screen that only shows black boxes in the top row using the following code:
#include ...
0
votes
0answers
12 views
Voice Recognition Automatic Train
Voice Recognition with Arduino - RGB LED and Light Bulb (Home Automation)
In the link provided above, what code will I use to automatically input another set of voice commands into the Arduino using ...
0
votes
1answer
47 views
Rotary Encoder problem with LCD Display
Program reads rotary encoder correctly without bouncing in this code:
int val = 0;
byte clkPin = 3;
byte dtPin = 2;
bool lastClk;
bool lastDt;
void setup() {
pinMode(clkPin,INPUT);
...
0
votes
0answers
32 views
LCD 1602a not showing anything
I have interface a 1602 LCD to Arduino but nothing is displayed on the display, tried varying the contrast via the potentiometer, even tried to use PWM to vary the contrast automatically. The displays ...
0
votes
4answers
83 views
I am planning to do a periodic table with Arduino's help but I have a few questions
I'm doing that for my school project, but I have few questions before I purchase the components.
First of all, let me explain how it will work:
There will be 4x20 LCD, an Arduino and probably two ...
0
votes
1answer
30 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
35 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
40 views
Troubleshoot Arduino LCD 16 x 2 shield
I tried to assemble Adafruit's Arduino LCD 16 x 2 using the instructions RGB LCD Shield: Control a 16x2 Character LCD using 2 pins - Assembly without any success.
After assembly, I uploaded the ...
1
vote
1answer
54 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 ...
3
votes
0answers
40 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
26 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
60 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
27 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
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1answer
37 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 ...
1
vote
0answers
40 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
93 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
67 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
114 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
64 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
179 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
98 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
200 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
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1answer
80 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
1answer
591 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
18 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
205 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
58 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
117 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
124 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
63 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
421 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
5answers
1k 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
42 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
65 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
95 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
119 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
150 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
114 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
103 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
42 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 ...
