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
58 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 ...
0
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0answers
21 views
How to create and write a file on SD card using arduino
I'm trying to write an arduino program which will write and read data from the SD card using different methods apart from Void setup() and void loop(), but the initialization of SD card I have done in ...
2
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2answers
28 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
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1answer
20 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
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2answers
23 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
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3answers
69 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
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1answer
14 views
arduino mega_lcd
.i am doing lcd interfaced with arduino.Sometimes it happens it shows nothing after uploading the program.what to do?
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1answer
22 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
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2answers
60 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
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1answer
30 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; ...
0
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1answer
42 views
Who makes this cool Arduino display shield, and what model is it?
Anyone recognize Mfgr/model of this display that reads: "Wireless Internet Of Things". The Arduino board is a WIOT.
I've been looking and looking for a source for Arduino display like this, but ...
0
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3answers
39 views
Adding Date and Time to existing sketch
I am currently trying to add a clock functionality to my current sketch for a peristaltic pump [run by NEMA 23].
The current sketch waits for a button on my breadboard to be pressed, it then runs ...
0
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1answer
29 views
Piezo sensors for intruder location
I am working on a project using 4 piezo sensors, and I want to be able to take 4 signals integrate them and provide an out put to an LCD pinpointing the location of movement within the area of the 4 ...
0
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1answer
23 views
How could I display a iRC Chat on a Arduino i2c LCD
OK so how could I go about putting a iRC chat on a LCD?
I'm kinda new to arduino and LCDs and this seems like a cool project to do :)>
-Thanks
Here is code I'm using to display stuff on the lcd
...
1
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2answers
72 views
Arduino LCD Screen
I am newer to arduinos, and could use some help. I have a LCD screen hooked up to an arduino uno. I can get it to display whatever I type in, which is great. But, what i want it to display is a value ...
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0answers
34 views
interface arduino with lcd to work as oscolliscope [closed]
in my project ... l get a sin wave from arduino due and i want to connect it with tft lcd work as an oscollicope to show my signal.
so i want to ask ..do i need a shield for arduino ? ... what do i ...
0
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1answer
82 views
Code: Switch case and loop problem
Please am working on this automatic drink dispenser, i got a sample code as am still an amature.
I seem to be stuck and i please need assistance.
Components:
I2C, keypad, LCD peristaltic pump.
...
0
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1answer
47 views
Why does my 1602a LCD not display text with this code
#include <SPI.h>
#include <MFRC522.h>
#include <LiquidCrystal.h>
#include <Servo.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define ...
3
votes
1answer
53 views
Why does my lcd screen work fine and then display random characters?
It works as expected for a few seconds and then random letters appear on the second row. The wiring and the programming should be correct. I wired it according to an Arduino Starter Kit Book and coded ...
1
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1answer
107 views
Why do I get “invalid operands of types 'const char*'” error?
I am making an Arduino alarm. This is the error:
exit status 1
invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
Here is the code that triggers it:
lcd.print("0"+...
0
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1answer
47 views
Button Relay Control
How can I fix this sketch to make it so that once the button is pressed, it performs some action for a certain amount of time and then returns back to a low state until it is pressed again. For ...
4
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1answer
96 views
RFID/NFC Tag get data from wordpress MySQL
I have a local workshop for students to teach them 3D printing/woodworking
I want to know if its possible to create RFID/NFC tags using wordpress data from MySQL or HTTP/HTTPS.
Web Scenario :
I ...
1
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1answer
47 views
Trouble using lcd.readButtons() in RGBLCDShield library
I am trying to create a state machine that loops in whatever state it's in until a button is pressed. I am using the Adafruit_RGBLCDShield library along with the LCD shield and 16x2 display. For ...
0
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2answers
138 views
Trying to print text on LCD display from Arduino trinket
I'm trying to simply program an Arduino trinket to display some text on an LCD display.
I'm basically trying to follow this, except connect it to a Trinket rather than an Arduino Uno. The background ...
0
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0answers
34 views
arduino nokia 5110 lcd problem
I have Arduino UNO and nokia 5110 LCD. And I have DHT 22 sensor,BMP180 sensor. I want to show temperature, pressure and huminity. My sensors are also work. I can see what they calculate in serial ...
0
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1answer
38 views
Need Help with Switch Case commands/receiver and lcd screen project?
I am doing a project with a receiver and transmitter and i am trying to get a message to print onto the screen. If anybody has any experience with this could you please help! I am trying to use a ...
0
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1answer
111 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
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1answer
29 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
702 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.
(https://github.com/...
0
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2answers
80 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
130 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 ...
0
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0answers
362 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
74 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
67 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
70 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
51 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
66 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 ...
0
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1answer
21 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
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1answer
36 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 ...
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1answer
21 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
37 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
116 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: https://www.dropbox.com/s/mqk4u0vu8yvhiwz/IMG_3171.m4v?dl=0....
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votes
3answers
205 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
70 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
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1answer
979 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
72 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
86 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
122 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, ...
1
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0answers
34 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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1answer
145 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);
pinMode(dtPin,...
