4 Digit Common Cathode 0.5″ – 7 Segment Display Module (Multiplexed)

  • Rajkumar Sharma
  • 42 Views
  • easy
  • Tested

This 4 Digit 7 segment display project contains 4 x Common Cathode displays, current limiting resistors or each LED segment, 4 x PNP transistors on each common cathode for multiplexing, etc. This is a very compact project that works with 5V TTL signals but can be optimized for 3.3V operations by reducing current limiting resistors values. A header connector is provided for easy interface to Arduino or other microcontrollers. All inputs are compatible with TTL 5V signals.

Multiplexed display

https://en.wikipedia.org/wiki/Multiplexed_display

  • PIN 1 NC (VCC-NO USE)
  • PIN 2 SEGMENT A
  • PIN 3 SEGMENT B
  • PIN 4 SEGMENT C
  • PIN 5 SEMENT D
  • PIN 6 SEGMENT E
  • PIN 7 SEGMENT F
  • PIN 8 SEGMENT G
  • PIN 9 DP
  • PIN 10 DISPLAY 1 CATHODE (BC847 BASE)
  • PIN 11 DISPLAY 2 CATHODE (BC847 BASE)
  • PIN 12 DISPLAY 3 CATHODE (BC847 BASE)
  • PIN 13 DISPLAY 4 CATHODE (BC847 BASE)
  • PIN 14 GND

Features

  • 7-segment CC displays
  • Multiplexed
  • 5V TTL input
  • PCB dimensions: 51.28 x 17.78 mm

Arduino test code is provided below.

Similar modules

Schematic

Parts List

NOQNTYREFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
11CN114 PIN MALE HEADER CONNECTOR PITCH 2.54MMWURTHDIGIKEY732-5334-ND
21C1DNP
34DS1,DS2,DS3,DS47-SEGMENT 0.5 OR 0.56INCH COMMON CATHODE RED OR GREEN DISPLAYSUN LEDDIGIKEY754-1705-5-ND or 754-1704-5-ND
44Q1,Q2,Q3,Q4BC847ALNEXPERIADIGIKEY1727-2924-2-ND
54R1,R2,R3,R41K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
68R5-R14220E 5% SMD SIZE 0805MURATA/YAGEODIGIKEY

Connections



Gerber View

Photos

Video

SC56-21SRWA Datasheet

SC56-21SRWA

PCB

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