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.)
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1answer
9 views
How to sleep a whole circuit?
I have just completed my first project, a clone of the Simon game of the eighties. The main parts of the circuit are an ATMega328, a 1602 2x16 LCD, and a small joystick.
It is powered directly from ...
1
vote
1answer
20 views
Working on a reaction test for the Arduino Uno using an led and an lcd shield
The situation involves some Asm inline practice and a basic circuit. The program turns an LED on after a somewhat random period of time then waits until the button is pressed to report back how many ...
0
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1answer
39 views
ESP8266 Arduino 2.2inch ILI9341 TFT library
I recently got one TFT LCD from aliexpress which supports SPI and uses ILI9341.
This is the one.TFT LCD
I have the ESP8266 EspressoLite 1 board, and I am using ESP8266 Arduino.
...
0
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2answers
30 views
Error on Arduino Code (unknown type name 'LiquidCrystal')
I am using Arduino IDE 1.6.8 and I am trying to compile the following code Wheatstone Bridge. I have currently a really weird error:
unknown type name 'LiquidCrystal'
This error seems to come from ...
0
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1answer
61 views
arduino mega overheat when connected to TFT 7" and TFT shield
I have bought a 7" LCD (TFT01-7) and a shield to make it work with arduino mega (http://www.elecfreaks.com/store/lcd-tft01-mega-shield-v10-p-214.html), but when I upload my code to the arduino and ...
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0answers
40 views
Nextion display message text garbled
I am communicating with my Nextion display using this arduino library. I am following this tutorial which says that the text in the serial monitor should look like 65 0 2 0 ffff ffff ffff. For me, it ...
1
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2answers
37 views
Draw polygon on LCD from GPS latitude and longitude
I'm working on a personal project (a usefully tool based on ublox GPS and Arduino Mega that can measure distance between 2 points, compute area, speed, save data on SD card)
Now I want to add new ...
0
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1answer
37 views
Help! Interfacing LCD with Arduino using 8255A Intel peripherals
I'm new to all this stuff and for the past two days, I have been trying to interface a 16x2 LCD to an Arduino Uno using an Intel 8255A component without any luck. The problem is, how can I attach or ...
1
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0answers
24 views
How do I display serial monitor on LCD keypad shield?
I want to be able to display what I am seeing on the serial monitor onto the LCD keypad shield I have connected to my Arduino UNO. Can someone possibly write the the code ontop of this for me?
I'm ...
4
votes
1answer
34 views
Library LiquidCrystal_I2C don't work in other class (Composition)
Good afternoon, I'm trying to use a class to streamline the writing on the LCD. In this class I have an private attribute (it's a pointer, do not know how I call him) called LiquidCrystal_I2C* _lcd, ...
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1answer
24 views
Arduino: pins still active after entering sleep mode
I'm writing an Arduino sketch to control a display with my Arduino Nano. I have wired it up as explained here, but used pin 3-7 instead of pin 2-6 listed in the example. The reason I did so is that I ...
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1answer
13 views
Use object of LiquidCrystal class within another class
I am quite new to C++ and hope that I don't bore you too much with my question.
I want to use an object of LiquidCrystal Class in another class called "Display_ManagerClass". I followed the ...
0
votes
1answer
23 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 ...
-1
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1answer
19 views
Regarding use of software serial two times
Can we configure two digital pins as serial pins using software serial library?
1
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3answers
33 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
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2answers
73 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
votes
3answers
60 views
How can we replace a 10k potentiometer with resistors?
I am using an LCD (16x2) with an Arduino Uno R3, in for that I need a 10 kΩ potentiometer, but I don't have it now. How can I replace that?
I have resistors of many kinds and a 1 kΩ ...
1
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0answers
37 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> ...
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1answer
99 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 ...
1
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0answers
43 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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1answer
47 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
74 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, ...
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0answers
31 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
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0answers
13 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
60 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);
...
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0answers
41 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 ...
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4answers
88 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
33 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
46 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
41 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
61 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
43 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
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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
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2answers
82 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
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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
49 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
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0answers
50 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
98 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
72 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
144 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
68 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
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2answers
388 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
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2answers
122 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
252 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
95 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
776 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 ...
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0answers
20 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
249 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
68 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
133 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 ...
