Interfacing 7 segment | interfacing lcd display with 8051

Updated: Feb 23

In this #DIY project, you will learn how to interface a seven-segment LED display with an 8051 #microcontroller by simulating it on #proteus software.

Hardware Requirements - interfacing lcd display with 8051

a) 8051 microcontroller:

It is an 8-bit microcontroller built with 40 pins DIP, 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers. It was designed by intel in 1981.

b) Resistors:

It is an electrical component that provides electrical resistance to a circuit. The circuit we are using consists of one 10K resistors and one 330 ohm resistor. | interfacing lcd display with 8051 |

c) Crystal Oscillator:

It is an electronic oscillator that uses the mechanical resonance of piezoelectric material to create an electrical signal of constant frequency. The circuit we are using consists of a crystal oscillator of 12MHz frequency.

d) Capacitor:

It is a device that stores electrical energy in an electric field. The circuit we are using consists of two 33pF capacitors and one 10uF capacitor.

e) Seven-segment display:

Seven segment displays are electronic displays widely used to display numbers from 0 to 9. A seven-segment display consists of 8 LEDs, each LED is used to illuminate a segment in the display. We can refer to each segment as a, b, c, d, e, f, g, and the dot as h. This display consists of 10 pins out of which 8 are used as connections to the segments and the dot and the rest 2 pins act as common cathode and common anode.

Software Requirements

Proteus Design Suite:

It is a software used for electronic design, simulation, and automation.

Circuit Connections

Interfacing 7 segment interfacing lcd display with 8051-circuit diagram

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Circuit connection involves the following steps:

An external crystal oscillator is connected to the microcontroller through pins 18 and 19.
Crystal pins are connected to the ground through the two 33pF capacitors.
7 segment LED display is connected to the microcontroller through pins 21, 22, 23, 24, 25, 26, 27, and 28 of port 2.
The LED display is connected to the ground through a 330-ohm resistor.
Pin 9 of the microcontroller is connected to the ground through a 10k resistor and to 5V power through a 10uF capacitor.
A push-button is connected to the microcontroller through pin 1 of port