20x4 lcd display specifications pricelist

ERM2004SYG-3 is small size 20 characters wide,4 rows character lcd module,SPLC780C controller (Industry-standard HD44780 compatible controller),6800 4/8-bit parallel interface,single led backlight with yellow green color included can be dimmed easily with a resistor or PWM,stn-lcd positive,dark blue text on the yellow green color,wide operating temperature range,rohs compliant,built in character set supports English/Japanese text, see the SPLC780C datasheet for the full character set, It"s optional for pin header connection,5V or 3.3V power supply and I2C adapter board for arduino.

A 20x4 LCD display is very basic module and is very commonly used in various devices and circuits. These modules are preferred over seven segments and other multi segment LEDs. The reasons being: LCDs are economical; easily programmable; have no limitation of displaying special & even custom characters (unlike in seven segments), animations and so on.

A 20x4 LCD means it can display 20 characters per line and there are 4 such lines. In this LCD each character is displayed in 5x7 pixel matrix. This LCD has two registers, namely, Command and Data. This is standard HD44780 controller LCD.

The Displaytech 204G series is a lineup of 20x4 character LCD modules. These modules have a 98x60 mm outer dimension with 77x25.2 mm viewing area on the display. The 204G 20x4 LCD displays are available in STN or FSTN LCD modes with or without an LED backlight. The backlight color options include yellow green, white, blue, pure green, or amber color. Get a free quote direct from Displaytech for a 20x4 character LCD display from the 204G series.

Sunrise Semiconductor, established in the year 2002, with its flagship brand SUN, is a professional and well known LED DISPLAY distributor. With 13 years of extensive experience in the industry and support from reputed manufacturers from Greater China, Korea and Singapore, we make sure Standard brightness, Low current operation, Excellent appearance, Easy mounting on P.C.B or sockets, regularity in supply, strong technical support and above all best competitive prices.

This is an industry standard HD44780 based controlled 4 lines x 20 characters LCD display with WHITE characters on BLUE background and backlight. It is a parallel interface so you will need 7 GPIO pins for 4-bit mode or 11 GPIO pins for 8-bit mode to interface to this LCD screen

PLL-based FM stereo transmitter (87.50-108.00MHz, 10KHz step), 0-1000W output, LCD for display of frequency, FWD, REF, etc., protections, easy keypad frequency selection, save power-on frequency and other operating parameters. 2U rack mount unit. Lead time: 20 work days. Weight: 14Kg

DDS-based AM stereo transmitter (530-1710KHz), 100W (carrier), 400W (PEP) output, LCD frequency, FWD, REF, etc. display, protections, easy keypad frequency selection, save power-on frequency and other operating parameters. 2U rack mount unit. Lead time: 20 work days. Weight: 13Kg

DDS-based AM stereo transmitter (530-1710KHz), 25W (carrier), 100W (PEP) output, LCD frequency, FWD, REF, etc. display, protections, easy keypad frequency selection, save power-on frequency and other operating parameters. 2U rack mount unit. Lead time: 20 work days. Weight: 9Kg

DRM medium wave Low Power transmitter 60mW AVG (600mW PEP) (530-1710KHz). Accepts I & Q encoded signals from PC audio card with appropriate software such as SPARK. Comes with 20x4 LCD frequency display.

PLL-based FM stereo transmitter (87.50-108.00MHz, 10KHz step), 0-300W output, LCD for display of frequency, FWD, REF, etc., protections, easy keypad frequency selection, save power-on frequency and other operating parameters. 2U rack mount unit. Lead time: 20 work days. Weight: 9Kg

PLL-based FM stereo transmitter (87.50-108.00MHz, 10KHz step), 0-500W output, LCD for display of frequency, FWD, REF, etc., protections, easy keypad frequency selection, save power-on frequency and other operating parameters. 2U rack mount unit. Lead time: 20 work days. Weight: 14Kg

DigiWheel LCD: Thumb-wheel plug-in replacement for RVR FM transmitters with additional CLI serial interface for remote management and many options70.0086.80

Replacement controller with 16x2 blue LCD and open limits -- compatible with all RVR radio links series PTRL-NV, RXRL-NV, and FMPLLPTXxx-UHT100.00124.00

Transmitter PLL or amplifier controller board 2U with 20x4 text LCD, 4 push buttons, standard RS232, accepts LM35 temperature sensor, current & voltage measurements, can program PLL (ready-made for MC145170, SAA1057, ask), buzzer, and schematic150.00186.00

Board with 9S08QE128 with your choice of graphic 128x64 or 20x4 text LCD, 4 pre-amplified analog inputs (2 AC & 2 DC signals), 2 MOSFET-based power drivers, numerous I/O, 4 push buttons, SD/MMC card interface, standard RS232 and Ethernet module, CR2032 battery backup, option for PS/2 keyboard, option for MRAM EverSpin 25H10, buzzer, and schematic120.00148.80

AM DDS-based Low Power 0.5W (100mW USA) C-QUAM stereo transmitter (530-1710KHz). Comes with 8x2 LCD frequency display, box, easy keypad frequency selection, save power-on frequency. Weight: 350g

On previous tutorials on our website, we have covered the use of several displays, LCDs, and TFTs, with diverse Arduino boards. From Nokia 5110 LCD display to different types of OLEDs, the reason for the tutorials has been to ensure that, as a reader, you know how to use many of the most popular displays so this help you make the best choice when trying to select the perfect display for your project. For today’s tutorial, we will continue in that line and examine how to use the 20×4 I2C Character LCD Display with Arduino.

The 20×4 LCD display is essentially a bigger (increased number of rows and columns) version of the 16×2 LCD display with which we have built several projects. The display has room to display 20 columns of characters on 4 rows which makes it perfect for displaying a large amount of text without scrolling. Each of the columns has a resolution of 5×8 pixels which ensures its visibility from a substantial distance. Asides its size, the interesting thing about this version of the display being used for today’s tutorial is the fact that it communicates via I2C, which means we will only require 2 wires asides GND and VCC to connect the display to the Arduino. This is possible via the Parallel to I2C module coupled to the display as shown in picture below. The I2C module can also be bought individually, and coupled to the 16 pins version of the display.

To demonstrate how to use this display, we will build a real-time clock which will display date and time on the LCD. To generate and keep track of date and time, we will use the DS3231 Real time clock. We covered the use of the DS3231 RTC module in the tutorial on DS3231 based Real-time Clock, you can check it out to learn more about its use with the Arduino.

Since the display and the real-time clock are both I2C devices, they will be connected to the same pins on the Arduino. For the Arduino Uno, the I2C pins are located on Pin A5 (SCL) and A4 (SDA). This may differ on any of the other Arduino boards. Connect the components as shown in the schematics below;

To write the code for this project, we will use three main libraries; the DS1307 Library to easily interface with the DS3231 module, the liquid crystal I2C library to easily interface with the LCD display, and the Wire library for I2C communication. While the Wire library comes built into the Arduino IDE, the other two libraries can be downloaded and installed via the links attached to them.

As mentioned during the introduction, our task for today is to obtain time and date information from the RTC module and display on the LCD. As usual, I will do a breakdown of the code and try to explain some of the concepts within it that may be difficult to understand.

We start the code by including the libraries that will be used. After which we create an object of the Liquid crystal library, with the I2C address of the LCD as an argument. The I2C address can be obtained from the seller or as described in our tutorial on using the 16×2 LCD display to ESP32.

Next, we create a set of variables which comprises of byte arrays that represent custom characters to be created and displayed.  The custom characters are usually 5pixels in width and 8 pixels in height, representing each box in the rows or columns of the LCD. The byte array represents which pixels of the box to be turned on or off.

Next, we write the void setup function and start by initializing the library using the lcd.begin() function, with the first argument representing the number of columns, and the second argument representing the number of rows. After this, the CreateCustomCharacters() function is called to convert the char variables created above into characters that can be displayed on the LCD. One of the characters created is then used to create a UI/frame which is displayed using the printFrame() function.

The first function is the printTime() which breaks down the time data stored in the “tm” variable to extract seconds, minutes and hour values. These values are then displayed on the LCD using the lcd.print() function.

The printDate function is similar to the printTime function. It extracts date information from the variable tm and uses the lcd.print() function to display it.

The printFrame() function, on the other hand, was used to create a sort of user interface for the project. it makes use of the characters created above. Each of the custom characters created is displayed using the lcd.write(byte(x)) function with x being the character number of the character to be displayed. The characters are positioned on the LCD using the lcd.setCursor() function which takes numbers representing the column and row on which the character is to be displayed, as arguments.

Different projects, come with different screen requirements. If you need to display a large amount of information and the size is not a constraint, the 20×4 I2C display is definitely one of the options you should consider.