Led scrolling message display using PIC16f628A

Hi this is my next good one for you

This is a simple led scrolling message display using 16f628a with CD4017 as shift ic ,this project require  simple components for the construction of the display controller  module, so i think it will be very easy to you to construct your self even if you are not well experience in soldering .

COMPONENTS REQUIRED

PIC16F628A    - 1
CD4017            - 4-5nos
24LC256OR 24LC512 - 1
9 pin D female  port - 1
74HC08 - 1
22pf - 2
10MHz crystal - 1
1N4148 or 914 -  5
Red LED - 1
Green LED -1
SPDT switch -1
LED  - depend upon your design
PCB
Soldering iron
etc

Schematic diagram

My project under construction

TO DOWNLOAD THE HEX CODE PLEASE CLICK HERE

Project by kajahussain T  thank you

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SCROLLING DISPLAY WITH 12 SEGMENT USING 16F628A

SCROLLING DISPLAY WITH 12 SEGMENT USING 16F628A

Hi this is my next good one for you it is very difficult to build a scrolling display with larger number of  segments or simply with more character space but now it is more easy here i am going to show you a beautiful scrolling message display  with 12 segments! ,you can build it without any  confusion because it is verified you have the proof to see the proof please click here

to download the hex file please click here

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MOVING MESSAGE DISPLAY USING 16F628A

MOVING MESSAGE DISPLAY USING 16F628A


Hi this is my next good one for you here iam going to show a simple scrolling display using pic16f628a with single led  dot matrix , it is a good simple design for your first scrolling display  project

for more information refer the pictures below and use the simulation video .To watch the video please click here

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to download the hex code for the project please click here

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SCROLLING DISPLAY SIMULATION USING PROTEUS

PROTEUS SIMULATION OF MOVING MESSAGE DISPLAY USING 89C52

Hi this is my next good one for you , this is a simplified schematic diagram of  scrolling message display using 89c52 it is very simple in construction and it is cost effective for your scrolling message display circuit to watch the video please click here

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to download the hex code click here

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PIC12F675 Single RGB LED Controller

Hi this is my next good one for you

PIC12F675 Single RGB LED Controller

to download the source code please click here

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RGB LED Matrix

RGB LED Matrix

The circuit uses 74HC595 shift registers with output latch. Each shiftregister interfaces one color + one shiftreg for the matrix rows. The interfaces uses 6 I/O lines for faster speed and easier interfacing. An AVR running at 8MHz can update the matrix with 8 brightness levels displaying nice fading colors patterns or colored text (or both). The sample program creates fading color patterns using a sine table. For smoother display a double buffer was implemented. 

to download the firmware please click here   

Download: rgbmatrix.c

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Big 7-segment Display Clock

Big 7-segment Display Clock

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Power RGB controller

hi it is very difficult to control power rgb led using our normal microcontroller based controlling circuits here i am going to post a simple Power rgb controller using active components , i am sure it will help you to develop your own design for your RGB controller it is only a reference for you thank you

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USB DotMatrix Display

Download:

• to download usbmatrix.zip click here

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7 segment rolling display using PC  

It is very interesting and convenient to be able to control everything while sitting at your PC terminal. Here, a simple hardware circuit and software is used to interface a 7-segment based rolling display. The printer port of a PC provides a set of points with some acting as input lines and some others as output lines. Some lines are open collector type which can be used as input lines. The circuit given here can be used for interfacing with any type of PC�s printer port. The 25-pin parallel port connector at the back of a PC is a combination of three ports.

The address varies from 378H-37AH. The 7 lines of port 378H (pins 2 through 8) are used in this circuit to output the code for segment display through IC1. The remaining one line of port 378H (pin 9) and four lines of port 37AH (pins 1, 14, 16, 17) are used to enable the display digits (one a time) through IC2. The bits D0, D1 and D3 of port 37AH connected to pins 1, 14 and 17 of �D� connector are inverted by the computer before application to the pins while data bit D2 is not inverted.

Therefore to get a logic high at any of former three pins, we must send logic 0 output to the corresponding pin of port 37AH. Another important concept illustrated by the project is the time division multiplexing. Note that all the five 7-segment displays share a common data bus. The PC places the 7-segment code for the first digit/character on the data bus and enables only the first 7-segment display. After delay of a few milliseconds, the 7-segment code for the digit/character is replaced by that of the next charter/digit, but this time only second display digit is enabled. After the display of all characters/digits in this way, the cycle repeats itself over and over again.

Because of this repetition at a fairly high rate, there is an illusion that all the digits/characters are continuously being displayed. DISP1 is to be physically placed as the least significant digit. IC1 (74LS244) is an octal buffer which is primarily used to increase the driving capability. It has two groups of four buffers with non-inverted tri-state outputs. The buffer is controlled by two active low enable lines. IC2 (75492) can drive a maximum of six 7-segment displays. (For driving up to seven common-cathode displays one may use ULN2003 described elsewhere in this section.) The program for rolling display is given in the listing DISP.C above. Whatever the message/characters to be displayed (here five characters have been displayed), these are separated and stored in an array. Then these are decoded. Decoding software is very simple. Just replace the desired character with the binary equivalent of the display code. The display code is a byte that has the appropriate 

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