Tuesday 7 July 2015

Interfacing 7 segment display module with 8051 Microcontroller

Once you get started with 8051 microcontroller and do some initial experiments like LED Interfacing, you would like to move ahead with interfacing some commonly used sensors and display units like LCDs and 7 segment displays. Let us see a tutorial which will share the details of 7 segment displays, their working and a detailed guide to interface with 8051 microcontroller.


Seven segment displays are among the simplest display units to display numbers and some characters. It consists 8 LEDs, each LED used to illuminate one segment of unit and the 8th LED used to illuminate DOT in 7 segment display. We can refer each segment as a LINE, as we can see there are 7 lines in the unit, which are used to display a number/character.

Check out the circuit diagram and C program to interface 7 segment display with 8051 microcontroller.

Here is the video which depicts a 0-9 number counter on the 7 segment.


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