Controlling 7x5 LED MATRIX DISPLAY Using MATLAB GUI

By: Vivek S. Gupta on 10:47

7x5 LED MATRIX DISPLAY

Video:

Material required :

Sr no	COMPONENT NAME	QTY
1.	3 mm Led bulbs	35
2.	P89V51RD2 microcontroller	1
3.	10 micro farad capacitors	3
4.	1000 microfarad capacitors	1
5.	IC 7805 (regulator IC)	1
6.	270 ohms resistor	5
7.	10 k resistor	1
8.	33 Pico farad capacitor	2
9.	11.0592 MHz crystal oscillator	1
10.	One to one connector	15
11.	9v battery	1
12.	Battery snapper	1
13.	BC 557 transistor	5
14.	BC 547 transistor	7
15.	IC CD 4017 (shift register)(OPTIONAL)	1
16.	Berg strip	2
17.	PCB	1
18.	Single core wire	-

WORKING:

7x5 led matrix display is a basic display which contains a circuitry of total 35 led bulbs connected in a matrix form. The general operation is based upon Persistence of Vision (POV) display. In this display rather than switching on every led in the matrix at once, we switch on the first row of the display and display the occurrence of the letter of the last row pixel. And gradually switching on the last second row and glowing the led according to the occurrence of the given character. And in similar way, we switch on and off concurrently based on the character to be displayed.

Following is the example when we want to display character “V” on the led matrix.The basic task of the project is to control a single 5x7 LED display from computer. I have developed a simple program in matlab which will serially send the data via wireless network on 2.4 GHz. On the other side, the transreceiver will receive the data and give it to the microntroller. The microcontroller will then operate the led matrix display.