4 Digit Common Cathode 0.5″ – 7 Segment Display Module (Multiplexed)
- Rajkumar Sharma
- 269 Views
- easy
- Tested
- SKU: EL115524
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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
- 2 Digit Common Cathode 0.5″ – 7 Segment Display Module (Multiplexed)
- 3 Digit Common Cathode 0.5″ – 7 Segment Display Module (Multiplexed)
Schematic
Parts List
NO | QNTY | REF | DESC | MANUFACTURER | SUPPLIER | SUPPLIER PART NO |
---|---|---|---|---|---|---|
1 | 1 | CN1 | 14 PIN MALE HEADER CONNECTOR PITCH 2.54MM | WURTH | DIGIKEY | 732-5334-ND |
2 | 1 | C1 | DNP | |||
3 | 4 | DS1,DS2,DS3,DS4 | 7-SEGMENT 0.5 OR 0.56INCH COMMON CATHODE RED OR GREEN DISPLAY | SUN LED | DIGIKEY | 754-1705-5-ND or 754-1704-5-ND |
4 | 4 | Q1,Q2,Q3,Q4 | BC847AL | NEXPERIA | DIGIKEY | 1727-2924-2-ND |
5 | 4 | R1,R2,R3,R4 | 1K 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
6 | 8 | R5-R14 | 220E 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY |
Connections
Gerber View
Photos
Video
SC56-21SRWA Datasheet
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