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

  • Rajkumar Sharma
  • 32 Views
  • easy
  • Tested

This 2 Digit 7 segment display project contains 2 x Common Cathode displays, current limiting resistors or each LED segment, 2 x PNP Transistor 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’ value. Header connector 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 SEGMENT 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 GND

Features

  • 7-segment CC displays
  • Multiplexed
  • 5V TTL input
  • PCB dimensions: 30.48 x 17.30 mm

Arduino test code is provided below.

Similar modules

Schematic

Parts List

NOQNTY.REFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
11CN112 PIN MALE HEADER CONNECTORWURTHDIGIKEY732-5334-ND
21C1DNP
32DS1,DS27-SEG COMMON CATHODE 0.5 OR 0.56 INCH REDSUN LEDDIGIKEY754-1705-5-ND or 754-1704-5-ND
42Q1,Q2BC847ALNEXPERIADIGIKEY1727-2924-2-ND
52R1,R21K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
68R3,R4,R5,R6,R7,R8,R9,R10220E 5% SMD SIZE 0805MURATA/YAGEODIGIKEY

Connections



Gerber View

Photos

Video

SC56-21SRWA Datasheet

SC56-21SRWA

PCB

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