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Arduino 3-Digit 0.5″ Common Cathode 7 Segment Display Module
- Rajkumar Sharma
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- moderate
- Tested
- SKU: EL115820
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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
- Arduino 2-Digit 0.5″ Common Cathode 7 Segment Display Module
- Arduino 4-Digit 0.5″ Common Cathode 7 Segment Display Module
Schematic
Parts List
| NO | QNTY. | REF | DESC | MANUFACTURER | SUPPLIER | PART NO |
|---|---|---|---|---|---|---|
| 1 | 1 | CN1 | 8 PIN MALE HEADER PITCH 2.54MM | WURTH | DIGIKEY | 732-5321-ND |
| 2 | 1 | C1 | 10uF/10V SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 3 | 2 | C2,C3 | 0.1uF/50V SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 4 | 2 | R3,C4 | DNP | MURATA/YAGEO | DIGIKEY | |
| 5 | 2 | C5,C6 | 22PF/50V SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 6 | 3 | DS1,DS2,DS3 | 0.5/0.56 INCH 7 SEGMENT COMMON CATHODE DISPLAY | SUN LED | DIGIKEY | 754-1705-5-ND or 754-1704-5-ND |
| 7 | 3 | Q1,Q2,Q3 | BC847AL | NEXPERIA | DIGIKEY | 1727-2924-2-ND |
| 8 | 1 | R1 | 10K 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 9 | 1 | R2 | 10E 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 10 | 3 | R4,R5,R6 | 1K 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 11 | 8 | R7-R14 | 220E 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 12 | 1 | R15 | 1M 5% SMD SIZE 0805 | MURATA/YAGEO | DIGIKEY | |
| 13 | 1 | U1 | ATMEGA328TQPF-32 | MICROCHIP | DIGIKEY | ATMEGA328PB-AURCT-ND |
| 14 | 1 | U2 | 3 PIN MALE OR FEMALE HEADER | OPTIONAL | ||
| 15 | 1 | X1 | 16Mhz | ECS INC | DIGIKEY | X1103-ND |
Connections
Gerber View
Photos
Video
SC56-21SRWA Datasheet
PCB
