lcd displays random characters pricelist

When I start my code, it displays as expected the initial screen on the LCD (as defined in setup() function) and then the temperature. But suddenly the LCD displays random characters, see attached, and somehow never stop displaying random characters until i restart the board.

So I am ultimately trying to build a fun security system using a 4x4 number pad, arduino, and a solenoid. While trying to get the number pad and LCD to work together, I keep running into issues for reasons unknown to me. The code below is what I have so far:

My LCD is showing random characters, see the picture below (the last character blinks, some characters change and over time there are slowly more and more characters). I"m starting to wonder if the LCD I chose has a driver compatible with the LiquidCrystal library, what do you think? If so what can I do to avoid buying another one?

A commonly used 1602 LCD display module with standard 16 pin interface. The module is a low-power consumption character LCD Module with a built-in controller. The LCD module can be easily interfaced with a MCU.Description:This LCD display module can be widely used in various fieldsLow power consumption, white characters, blue backlightPower Input: 5V DCDisplay Format: 16 Characters x 2 linesWorking Temperature: 0-50℃Storage Temperature: -10-60℃Display Type: STNModule Size (L x W x H): Approx. 3.1 x 1.4 x 0.4 inchViewing Area: Approx. 2.5 x 0.55 inchPackage Includes:1 x LCD module Brand Unbranded MPN Does not apply UPC 4894462182161 EAN 4894462182161 ISBN 4894462182161 Designer/Brand Unbranded.

In present scenario, we are giving supply to the LCD display with the help of 10 pin connector with 2 pins of 10 pin connector not connected and we attach power supply to the 2 wires left open.

A few weeks ago, we examined the features of ESP32 module and built a simple hello world program to get ourselves familiar with the board. Today, we will continue our exploration of the ESP32 on a higher level as we will look at how to interface a 16×2 LCD with it.

Displays provide a fantastic way of providing feedback to users of any project and with the 16×2 LCD being one of the most popular displays among makers, and engineers, its probably the right way to start our exploration. For today’s tutorial, we will use an I2C based 16×2 LCD display because of the easy wiring it requires. It uses only four pins unlike the other versions of the display that requires at least 7 pins connected to the microcontroller board.

The schematics for this project is relatively simple since we are connecting just the LCD to the DOIT Devkit v1. Since we are using I2C for communication, we will connect the pins of the LCD to the I2C pins of the DevKit. Connect the components as shown below.

Due to the power requirements of the LCD, it may not be bright enough when connected to the 3.3v pin of the ESP32. If that is the case, connect the VCC pin of the LCD to the Vin Pin of the ESP32 so it can draw power directly from the connected power source.

To be able to easily write the code to interact with the I2C LCD display, we will use the I2C LCD library. The Library possesses functions and commands that make addressing the LCD easy. Download the I2C LCD library from the link attached and install on the Arduino IDE by simply extracting it into the Arduino’s library folder.

Before writing the code for the project, it’s important for us to know the I2C address of the LCD as we will be unable to talk to the display without it.

While some of the LCDs come with the address indicated on it or provided by the seller, in cases where this is not available, you can determine the address by using a simple sketch that sniffs the I2C line to detect what devices are connected alongside their address. This sketch is also a good way to test the correctness of your wiring or to determine if the LCD is working properly.

If you keep getting “no devices found”, it might help to take a look at the connections to be sure you didn’t mix things up and you could also go ahead and try 0x27 as the I2C address. This is a common address for most I2C LCD modules from China.

Our task for today’s tutorial is to display both static and scrolling text on the LCD, and to achieve that, we will use the I2C LCD library to reduce the amount of code we need to write. We will write two separate sketches; one to displaystatic textsand the other to display both static and scrolling text.

To start with the sketch for static text display, we start the code by including the library to be used for it, which in this case, is the I2C LCD library.

Next, we create an instance of the I2C LCD library class with the address of the display, the number of columns the display has (16 in this case), and the number of rows (2 in this case) as arguments.

With that done, we proceed to the void setup() function. Here we initialize the display and issue the command to turn the backlight on as it might be off by default depending on the LCD.

Next is the void loop() function. The idea behind the code for the loop is simple, we start by setting the cursor to the column and row of the display where we want the text to start from, and we proceed to display the text using the lcd.print() function. To allow the text to stay on the screen for a while (so its visible) before the loop is reloaded, we delay the code execution for 1000ms.

For the scrolling text, we will use some code developed by Rui Santos of RandomNerdTutorials.com. This code allows the display of static text on the first row and scrolling text on the second row of the display at the same time.

Next, we create an instance of the I2C LCD library class with the address of the display, the number of columns the display has (16 in this case), and the number of rows (2 in this case) as arguments.

Next, we create the function to display scrolling text. The function accepts four arguments; the row on which to display the scrolling text, the text to be displayed, the delay time between the shifting of characters, and the number of columns of the LCD.

That’s it for today’s tutorial guys. Thanks for following this tutorial. This cheap LCD display provides a nice way of providing visual feedback for your project and even though the size of the screen and the quality of the display is limited, with the scrolling function you can increase the amount of text/characters that can be displayed.

I"ve got an original QS6, and the display on mine gave out about two years ago. It displays random gibberish... random characters that for some amusing reason scroll one character to the right with every MIDI event, so at the very least I have an indicator that it"s receiving MIDI data.

That sounds that alesis uses Faulty LCD displays....if im right they use serial inteligent LCD.....the mainboard of the keyboard or module send by serial data what to diplay....you can replzae that with another same line caracter LCD....

if you can take apart that LCD please look at thit close it...if they have a small chip or round glued like chip...that is the LSI chip that have the serial port and logic to diplay characters also gives the refresh clockt to the lcd....

if you can take a close up of the tear apart LCD form front and behind and post it here so i can take a look and advice what kind it is...and maybe we can look for a replacement on the WEB.... if it is a SMart lcd...there are plenty of them on the web...

I am holding in my hand the credit card sized module with the lcd display box soldered to it. Now I get now characters, just a nice green glow. Looks like a pretty simple fix,and my ordered part from Alesis should arrive next week.

I am holding in my hand the credit card sized module with the lcd display box soldered to it. Now I get now characters, just a nice green glow. Looks like a pretty simple fix,and my ordered part from Alesis should arrive next week.

God Bless ya Forkboy for supporting the team! I will report back as Alesis has assured me my part ( the LCD Module ) will arrive thursday. Just connect reibbon cable and go....I hope...gulp....

One thing here it looks that the LCD is SMART...hence the round GLUED black chip...inside the EPOXY is a chip that controls (decodes) the data comming from the KEyboard mainboard.... but it seems that are PARALLEL not serial as the ribbon is like 8 bits wide....

I guess my only question is this: my display shows nothing now, but still lights up... before, it did show characters, just incorrect ones. It would show actual letters and symbols, just at random, which led me to believe originally that the LCD was working fine, it was just being fed bad data by the motherboard.

I guess my only question is this: my display shows nothing now, but still lights up... before, it did show characters, just incorrect ones. It would show actual letters and symbols, just at random, which led me to believe originally that the LCD was working fine, it was just being fed bad data by the motherboard.

Hey all. I can report that all is now well with the LCD replacement. A really easy fix that ya can do in no time. One thing is that the newer LCD board as shown by Forkboy is larger than the originals, but all ya have to do is remove a bracket and you are good to go! Now off to record a platinum hit....

LCD character modules are “characteristically” simple display devices known for their very low power consumption, low cost and long-term reliability. They are designed to display alpha-numeric characters in preset patterns and do not have much. In most cases, they are small displays with only 8 or 16 or 32 characters, utilized for status reports and simple communication. It is the most popular display for hobbyist because of its ease of operation.

Orient Display offers many standard sizes including (characters x lines) 8×1, 8×2, 16×2, 16×4 , 20×2, 20×4 , 24×4, 40×4, and many more. Orient Display’s character LCD displays cover small LCD character display modules for tiny devices to large character LCD displays for medical equipments.

Orient Display character LCD modules use industrial standard Hitachi HD44780 controller or compatible controllers such as Sitronix ST7066U, Samsung S6A0069, so they can be quickly integrated into a new product or used as a replacement in your existing products.

The LCD panel technologies include TN, STN, FSTN, FFSTN or VA (Vertical Alignment) types and also with positive mode and negative mode and options of reflective, transflective or transmissive polarizers. There are different LED backlights available in various colors including yellow-green, white, red, blue, green, amber, and RGB LEDs as well as no backlight option.

The viewing angles for these character LCD displays are available with 6:00, 12:00, 3:00, and 9:00. Orient Display offers various IC options of character fonts including English/Japanese, western European, eastern European, Scandinavian European, Cyrillic (Russian), and Hebrew/Arabic. These LCD character modules and LCD modules can be used on industrial and consumer’s applications including printers, microwaves, water machines, medical devices, car and home audio, white goods, game machines, toys, industrial meters, etc.

Please see our character LCD display list here. If you can’t find any in the list, please check with our engineers to search our factory database or have a custom-made option.

A portable about the same size as the TRS-80 and NEC compouters and weighing only a half-pound more is from Sord Computer of America and adds such features as ""multiwindow"" display to permit viewing of several screens at once, the drawing of charts, file manipulation, data base management and calculation. It also has built-in microcasette recorder for external storage of data. A tiny printer is available as a plug-in accessory. Its display is also eight lines by 40 characters and its suggested list price is $995.

Also priced just under $1,000 is a new and more versatile portable, the Geneva PX-8, just introduced by Epson America. This unit has a flip-up LCD screen (which serves as a protective cover when in the folded position) capable of displayng eight full 80-character lines, or just double the information on the screens of the original lap models.

The most elaborate and sophisticated notebook-sized computer now available is the powerful Hewlett-Packard portable-a miniaturized version of a high-speed 16-bit personal computer that is compatible with the I.B.M. PC and XT computer series, has a hefty 272 kilobytes of random acces memory. It hesures 10 inches by 13 inches by 3 inches and weighs nine pounds, including a flip-up LCD of 15 lines of 80 charracters each. As a built-in, it has Lotus 1-2-3, the all-purpose program (spread sheets, graphics and file management) that is the best-selling single program, as well as Hewlett-Packard"s own word processing program, MemoMaker. The modem for communicating with other computers is also built in. Avialable as peripherals are battery-operated miniature three-and-one-half-inch disk drive (which can accomodate a large variety of standard acsoftware packages) and a personal printer. The Hewlett-Packard Portable is priced at $2,995.

Those who wish to interface with Apple computers now have a highly mobile possibility in the new Apple IIe, which is essentially a flying keyboard with a generous 128 kilobytes of random access memory. In addition, it comes with its own built-in standard five-and-one-quarter-inch disk drive and therefore can accomodte a wide variety of programs.