Single Digit LED Based 7 Segment SPI Display Using 74HC595

SINGAL DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 (3)

Single Digit Big Display module using 74HC595 IC project will display large size 7 segment single digit number. 3.5inch height, which can be visible over large distance.  More digit can be connected serially to each other easily trough connector.

This circuit is a single digit seven segment big display using a set of 5 LEDs per segment and a shift register for easy control by micro-controller input. Each of the LEDs used in this project are 5mm high glow type.

DOC

  • A ULN2003 IC helps sink higher current flowing through the LEDs to grounds.
  • Resistor R1 to R8 are current limiting Resistors for the LEDs connected in series.
  • CN1 Connector is Data In connector
  • CN2 Connector is optional Data Out Connector if you need to stack more than 1 single display board in series
  • +V CN1 & CN2 should be connected to higher voltage to drive the LEDs
  • VCC Should be connected to 5V DC. This supply can be source from host controller

 

  • Each Segment made up of 5LEDs
  • Series Current limiting resistor provide on each segment
  • Series latched type display using SPI protocol
  • Separate Header Connecter for connection input/output
  • Four Mounting holes 3.2MM each
  • PCB Dimension’s 125MM X 58MM

 

SINGAL DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 (4)

SINGLE DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 SCHEMATIC

SINGAL DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 (2)

SINGLE DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 PCB LAYOUT

SINGAL DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 (1)

SINGLE DIGIT 7 SEGMENT LED BASED SPI DISPLAY USING 74HC595 BOM

 

 


Driving an 8 digit, 7 segment display based upon the 74HC595…

A few weeks ago, I was scanning the Deal Extreme website, and ordered a few different LED displays, not because of any pressing need, but because I wanted to have some display options available if I needed some for a project. I was especially interested in cheap LED displays. One of the ones I ordered was this 8 digit, 7 segment display, which seemed to have a five pin interface. Without thinking about it too much, I went ahead and ordered it.


http://embedded-lab.com/blog/lab-15-scrolling-text-message-on-an-led-dot-matrix-display/


http://www.instructables.com/id/74HC595-digital-LED-Display-Based-on-Arduino-Code-/


 

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