Tagged Questions
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
18 views
VLcd pin to ground?
i just bought a ERC12864-655 lcd screen.
on the datasheet it says that i need to connect the vlcd pin to gnd.
However in this (page 8) datasheet it says that vlcd is the main power supply. As far ...
-1
votes
0answers
17 views
TFT LCD to Arduino mega 2560 [on hold]
I'm very new with TFT LCD, and I don't know how to use it with arduino. I don't know how to install this lcd with arduino. can I get the pict. to describe how to plug the lcd to arduino. thank you so ...
-3
votes
1answer
17 views
What is LCD bias voltage and where do I have to connect it?
I noticed that I have VB0+, VB0-, VB1+ and VB1- pins on my LCD. In the datasheet it says they are for the "LCD Bias Voltage". I have never heard about that. So what is it? Where do I have to connect ...
1
vote
1answer
21 views
Arduino Text Scrolling on 16x02 I2c on NodeMcu (ESP8266-12)
I have managed to get my 1602 I2C LCD working on a NodeMCU devkit. I can display text parsed from the web but I am not sure how to set it to autroscroll if message is greater than 16 characters. I ...
-3
votes
1answer
26 views
Where can I get high-quality LCD's for projects
So I've recently started learning about LCD communication with arduino but I have one question: Devices like PC's and smartphones use very high quality LCD's and if I wanted to use one (not ...
1
vote
1answer
37 views
Arduino Uno with Camera and LCD
I would like to ask you if I can display real time view from Camera in Arduino Uno with LCD.
I have that components:
Camera OV7670 VGA 0.3 MPX
LCD TFT 2.4 SPI ILI9341
Arduino Uno R3
On a website: ...
3
votes
2answers
93 views
+100
ATTiny85 I2C LCD
My setup is as follows:
Arduino IDE 1.6.11
Arduino Pro Mini as ISP
ATTiny85 1602A LCD with I2C board
The libraries I use are:
TinyWireM (source: https://github.com/adafruit/TinyWireM)
...
1
vote
3answers
37 views
FreqMeasure.h uncompatible with my code problem
I have written code to read temperatures on a motor which also has pulse feedback to see speed, (one hall sensor) and my previous version of the code does work fine, however when i add example ...
-1
votes
0answers
7 views
MKR1000 and Nokia LCD5110
I tried to connect the MKR1000 to display nokia 5110 using libraries issued by Adafruit -Adafruit_GFX.h-, -Adafruit_PCD8544.h- but filling in the sketch generates errors.Can you give me some more ...
-5
votes
1answer
25 views
Printing on LCD screen in different languages
I need to write to an arduino LCD screen in different languages like Japanese or Chinese.
Someone knows how?
1
vote
1answer
44 views
LCD 16x2 Blank Display
I am using the following wiring diagram from a tutorial. I need to follow this configuration because later tutorials build on this example. I have looked at other solutions, but they follow a ...
-1
votes
1answer
62 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
votes
0answers
25 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
votes
2answers
32 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
votes
1answer
27 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
votes
2answers
46 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
vote
3answers
76 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
votes
1answer
23 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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votes
1answer
28 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
votes
2answers
78 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
vote
1answer
43 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
votes
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
votes
3answers
45 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
votes
1answer
40 views
Piezo sensors for intruder location [closed]
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
votes
1answer
25 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
vote
2answers
74 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 ...
-3
votes
0answers
35 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
votes
1answer
90 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
votes
1answer
56 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
56 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
vote
1answer
206 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
votes
1answer
57 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
votes
1answer
102 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
vote
1answer
49 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
votes
2answers
148 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
votes
0answers
43 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
votes
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
votes
1answer
118 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
30 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
votes
1answer
895 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
votes
2answers
84 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
votes
1answer
141 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
votes
0answers
474 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
vote
2answers
80 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
votes
1answer
73 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
vote
0answers
76 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
57 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, ...
0
votes
1answer
86 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
votes
1answer
22 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
38 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 ...
