Arduino 3-Digit 0.5″ Common Cathode 7 Segment Display Module

  • Rajkumar Sharma
  • 36 Views
  • moderate
  • Tested

This project will help you to easily develop an Arduino compatible project that requires 3 x 7-Segment 0.5″ displays. These are common cathode displays that use multiplexed configuration, BC847 transistor drives 3 x common cathodes, all display segments are connected to the microcontroller using current limiting resistors. The circuit operates with 5V DC, Connector CN1 is provided for bootloader and Arduino firmware upload. Upload Arduino code to test the board. The user will be able to create a 5.00V Voltage Meter. Use analog pin A0 for voltage input, Connector U2.

Arduino Programming

A new Atmega328 chip requires a bootloader and Arduino firmware upload. Connector CN1 is provided for both operations, follow the link below to learn more about programming the board using Arduino.

https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard

Arduino Compatible Hardware

  • Atmega328 microcontroller
  • 3 x Digit 0.5 Inch 7 Segment Display, Common Cathode
  • 3 x BC847 Transistors to drive Display Common Cathode for Multiplexing
  • CN1: Arduino Programming and Boot-Loader
  • U2: 3 Pin Connector to Connect LM35 Temperature Sensor or Analog Input
  • Current Limiting Resistors for 7 segment display and other components

Applications

  • 3 Digit Counter
  • 3 Digit Timer
  • 3 Digit Thermometer
  • Voltmeter
  • Current Meter
  • Sensor Value Display
  • 3 Digit Score Board
  • Dice

Features

  • Supply 5V DC can be optimized for 3.3V Operations
  • LM35 Temperature Sensor or Analog Input A0
  • Compact Hardware
  • PCB Dimensions 38.42 x 35.40 mm

Arduino Pins

  • Digital Pin D10 Display 1 Common Cathode
  • Digital Pin D11 Display 2 Common Cathode
  • Digital Pin D12 Display 3 Common Cathode
  • Digital Pin D2 Display Segment A
  • Digital Pin D3 Display Segment B
  • Digital Pin D4 Display Segment C
  • Digital Pin D5 Display Segment D
  • Digital Pin D6 Display Segment E
  • Digital Pin D7 Display Segment F
  • Digital Pin D8 Display Segment G
  • Digital Pin D9 Display Segment DP
  • Digital Inputs D13, D12, D11, TX, RX (Available for Inputs after programming)
  • Analog A0 for Analog Signal Input from Sensor or Analog Source
  • Programming and Boot-loader Pin D13, D12, D11, TX, RX, RESET

Similar modules

Schematic

Parts List

NOQNTY.REFDESCMANUFACTURERSUPPLIERPART NO
11CN18 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5321-ND
21C110uF/10V SMD SIZE 0805MURATA/YAGEODIGIKEY
32C2,C30.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
42R3,C4DNPMURATA/YAGEODIGIKEY
52C5,C622PF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
63DS1,DS2,DS30.5/0.56 INCH 7 SEGMENT COMMON CATHODE DISPLAYSUN LEDDIGIKEY754-1705-5-ND or 754-1704-5-ND
73Q1,Q2,Q3BC847ALNEXPERIADIGIKEY1727-2924-2-ND
81R110K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
91R210E 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
103R4,R5,R61K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
118R7-R14220E 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
121R151M 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
131U1ATMEGA328TQPF-32MICROCHIPDIGIKEYATMEGA328PB-AURCT-ND
141U23 PIN MALE OR FEMALE HEADER OPTIONAL
151X116MhzECS INCDIGIKEYX1103-ND

Connections



Gerber View

Photos

Video

SC56-21SRWA Datasheet

SC56-21SRWA

PCB

Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments

RELATED PROJECTS

X