DM49C04 4-Digit 7-Segment LED Display Module – UART TTL Serial Port ASCII Text Display for Arduino UNO MEGA2560 LEONARDO MICRO NANO

 

Product Name: 3x 4bit UART TTL Serial Port 7Seg LED Digital Tube Display Module for Arduino for UNO MEGA2560 LEONARDO MICRO NANO ADAPTER Pro Mini

Packing list:

 

3 pcs 4 Digit UART(TTL232) Digital Tube LED Display Module;
(Please choose with Pin or no Pin)

 

 

Description:




Working voltage: DC 5V
4-digit 0.36-inch red digital tube
Driver chip: the company's custom chip
Driver interface: TTL 232 RXD, driven by USB to TTL or MUC UART TXD interface
Can display characters: AbcdEFGHIJKLMnopqrStUvWXYZ1234567890
Size: 33mm*15mm*11mm
Weight: 5 grams

Pin description:

VCC: positive power supply 5V
GND: negative power supply
RXD: serial port receiving line (connected with the TXD of the single-chip USB to TTL)

 

Applications:


for Arduiuo UNO MEGA2560 LEONARDO MICRO NANO ADAPTER Pro Mini ZERO DUE
for raspberry pi 3 B+ 4
for MCU AVR PIC ARM STM32
for FPGA/CPLD
for Toy car
for instrument meter
for Electronic hobby DIY

 

Connect with UNO(
Does not include UNO)

 

 

 

Connect with MCU/FPGA or USB to TTL232 Board


 

 

 

Theoretically, these Ascii characters ''AbcdEFGHIJKLMnopqrStUvWXYZ1234567890'' can be displayed, but some characters need to be identified according to the following table:

3 Special Function Characters:
#:Reset(And Clear Screen)
*:Insert Decimal Point
%:Bit Clear

How to use:
Connect the DC 5V power supply to the VCC GND port, and connect the RXD port to the TXD port of the MCU or USB to TTL Board

UART communication parameters: Baud rate 9600, 8, 1, N

Add the # reset command in front of the character, you can enter 1-5 characters (1-4 characters and 1 decimal point) at a time, more than 5 characters will cover the previous characters, except for #*% and the characters to be displayed, There must be no other characters (space/enter), otherwise an exception will be displayed.

Example:
Display 1234 Input: #1234
Display 123.4 Input: #123*4
Display 88.88 Input: #88*88
Display 123 Input : #123% Do not display the lowest digit
Display 234 Input : #%234 does not display the highest bit

Notice:
If it shows abnormality, please check if the string has ''space/enter'' or other special characters at the beginning or end of the string