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65 Threads found on Led Matrix Pic
Do you mean "save all sentence in memory map " and just scroll it? Not the sencence, but the alphabet bitmap. The standard strategy is to program the code in different functional layers: In short, one to define the character (in general, in static memory), other to scan each character, and another to scan
Besides wrong mux counter output polarity, if you want to light more than one led in a column, the series resistors should be connected to the row rather than the column transistors, otherwise the current will be shared by a varying number of leds and cause intensity variations.
Anybody know how to control speed ? It is very fast. #include<pic.h> #include #define _XTAL_FREQ 20e6 __CONFIG(0x3F3A); char z,i; void pattern(char a,char b,char c,char d,char e,char f,char g,char h,char n) { for(z=0;z<9;z++) { for(i=0;i<10;i++) {
Don't know what the "segment delay" value actually is, but there should be no problem to run the code in real hardware without flicker. In case you are talking about flickering in the proteus simulation, I suspect a pure simulation problem. Adjust the timeout in the led display properties.
I needs your helps to design led DOT matrix DISPLAY USING pic MICROCONTROLLER. I get some nice video in youtube. please help me....
It is a C code. Not releated to compiler. Can be compiled by any C compilier for any target.
What else do you need to do in your project other then drive the led display ?
hi, I have created a 32x7 led matrix using pic 18f2550 running at 48mhz(20mhz crystal) seven rows are scanned with cd4017 johnson counter 32 columns are driven by four 74hc595 shift registers scanning is done with a buffer array in timer0 overflow interupt at an in interval of 1.8 microseconds i made it to x-y addressable with the fo
hi, i created a 7X32 led matrix for text scrolling with the tutorial posted in Embedded Lab .com MCU IS pic 18F2550 CRYSTAL 20 MHZ 7 rows are scanned with cd4017 and goes to uln2803 and to matrix 32 columns are driven by chained 4 74hc595 shift registers I can scroll text from right to left without any problem (...)
if you do a web search for pic and lcd display it will give you plenty of links for hardware and programs thanks for the response i want idea about led dotmatrix please give any link
i want to fetch RGB led matrix frames from SPI RAM and scan it @ 60hz. i have decided that one controller fetch data from SPI RAM and share it to other controllers through its USB port they will do scanning and PWM stuff. this will save complex h/w like dual port ram etc. any suggestion regrading this ???
talking electronics have a good display using pic has six buttons for up,down,left,right,store and delete.check it out. just google talking the best.
I have seen this driver board along with some MCU and RTC clock chips. Can i use it as 8x8 matrix board with my pic ? Because on the site they have defined it can work with ICSP & Attiny Atmel MCU. Please confirm me can i use it with pic MCU ? us
The pic you want to use can drive up to 13 leds (13 I/O pins are available), but if you intend to use some I/O pins for other purposes you should use a led driver. A led driver is an integrated circuit that decodes an input code and outputs high or low (based on the code you send) on the pins used to drive the (...)
Hello Kanna, I had done an experiment in past with pic18F4550 and 8x8 led matrix display. I had implemented text scroller. You can find this post at following url: You will find source code, schematics and firmware example. If you still have any question please dont hesitate to ask. Regards
Hi all. I am working on led dot matrix produce by Sure Electronic which the board uses Holtek chip (HT1632). Does anyone know on how to develop program for this chip? Currently I am using pic16F877A. I am not very familiar with pic. I search for information on the net and most of them recommend SPI module. Here is the (...)
Good job!Now,i driver one 32x256RGB led matrix display.but i not use pic MCU and TLC5940.however,i think you are doing very nice project!if you can drive more area,and add communication,PC message editer software,it's will be perfect!
are you connecting this led'S to the microcontroller pin directly? are you using any transistor switch? which microcontroller you are using? Give me your circuit diagram.... Micro controller pins will handle only upto 25mA(this is for pic & may vary for diff type of uC) & if the current exceed it could damage the port pin... Connect the anode of
in my project i use scrolling matrix led...anybody tell how to interface with pic to matrix led and how to write program for that........
Hi, I just finished of with my development board. I'm using Proton 7 for compiling and the problem is that the led matrix I've connected with the zif adapter to toggle isn't working. I checked all the points of testing and it's working fine. I tried my chip on my friend's db and the led matrix is toggling up. Can anyone (...)
You can see Dot matrix 8x8 or led 16X8. This is for pic, you can see the logic to multiplexing and shifting character.
HI all, i'm trying to control 8*8 rgb dot matrix controlling the columns on/off is easy i did it with shift register the problem i'm facing is with TLC5940 Interface with led's row i used the following code and it works very will "it lights all the led and then turn them off in steps from 0 to 4095" for all of the three colors, the (...)
I have another led matrix has 12x12 pin. can you tell me how can i find connect this to a pic.
The link here shows an open source project that drives multiplexed leds, so that is your led display question resolved.
So are you using LCD or 7 segment display or matrix led and which micro are you using and are you using voice ic to announce the token numbers...give details..without that nobody will help you.
hi.. i have project moving sms on 16x64 matrix led using matrix gsm gdt11 model and 8051 microcontroller can any one help me in coding..??
hello even though I used the program applied for by you here in this link: but in the simulation program does not display the default message!! You said that its works very well! how her, I will send you the file later proteus, and c + +,I've used pic 16f877A, and I did the same assembly correspo
hi, actually i made 9 my own led dot matrix of 5*5 but i need a assist in logic how can i control all of them using a single uc either a atmega8 or 16f877a whether it is possible are not?
Hi Foot. I have done similar project to this in the past and found that perhaps using an array of characters is not the best approach, I used the maximum size available to me in the pic which was a long long (32bits I think) which made life easier for if I wanted to dynamically update the display, although I can see that you are just trying to d
Hello I build led matrix display based on 16F876 and have problem with resetting pic in most of the time when neon light is turn off in the room and pic is connected to PC. When PC and pic are disconnected everything is ok. Also every time PC is turn off, pic is reset or gets stuck. Here (...)
16 seven segment, every seven segment have 8 output. So, can do matrix connection in form 16X8 matrix. Here example 16X8 matrix (but in led). Other option, you can extend output using shift register 74595.
Hi, I'm building an led display from a group of 5x7 matrices. I'm building it in stages as I have got to grips with pic programming, shift registers, multiplexing etc. My next challenge is understanding how to power it though, and I'm having no luck finding anything to help me on the web. I will be running about 10 5x7 matrices, lighting them a
Scrolling Dot matrix led Display using 8051 / 8051 Projects / Downloads : 8051 Microcontroller Projects AVR pic Projects Tutorials Ebooks Libraries codes
hi, can any one help me to build a moving display using pic 16F877 and four 5x7 led matrix in c (MikroC) Thanking You Soina see here in the forum thread
Yes it is very useful. But I have a little bit problem. Mplab do not commplier your and new mine source code. error message is: Make: The target "C:\Copy (2) of DisplayDemo723a\delay.p1" is out of date. Executing: "C:\Program Files\HI-TECH Software\picC\9.81\bin\picc.exe" --pass1 "C:\Copy (2) of DisplayDemo723a\delay.c" -q --chip=16F723 -P --ru
lots of threads are discussed why don't you search typing led matrix display
Vinod, I already wrote this in another topic, about the same thing - using IF statements to decode a character to 5x8 matrix is very costly in program memory and execution time. An 'if' statement is translated into several processor operations (load a literal, subtract it from the 'test number' and branch based on zero (or carry depending whethe
Hello- I am designing a 8x8 led matrix with RGB leds. So 192 leds altogether. I want to control them using PWM so that I can have all of the colors. I am going to use a pic with 5-8 PWM channels. I am looking at some different led drivers from Allegra and also from ST Microelectronics. (...)
Hi, You can learn it here; pic Tutorial* Thirteen - Multiplexed led's Nigel's pic Tutorial - matrix led Board with shift
//pic 8char dotmatrix, switchable to static-scrolling //prg lenght 1077 words, made by zuisti, 29.08.2007 //for a simple and fast PROTEUS simulation I am not using line drivers ! #define COMMON_CATHODE #define BUFFERSIZE 56 //max. 54 chars (and 2 gap space) for scrolling message char buffer; //display buffer: 8 chars +
pls visit Downloads / 8051 Projects / Scrolling Dot matrix led Display using 8051 : 8051 Microcontroller Projects AVR pic Projects Tutorials Ebooks Libraries codes
check this out. CircuitDB | 7x7 Monochrome led Display . Regards, Jerin.
I need C code to move message on led matrix using MicroC and 74HC595 shift register. OR How to control 74hc595 shift register
Dear Experts, I want to display two lines (10 characters in each line) in led Dot matrix arrays (in each line there will be characters and numbers, e.g DATE 16 July). The content that will be displayed in the matrix will be provided by either a keypad (3X4 keypad) or from a PC. Please suggest me: 1. Which pic (...)
can someone help me fix the problem :?: the circuit don't work hi nobie, in your design port-a and port-b are trying to sink the current at both ports. so led's won't glow. try to give source from one port and sink the current at other port. please check the circuit which is been attached below. further quires te
Great :) I will have ta start a new topic on nonmultiplexed scrolling text display, got sick 'n tired of silly requests oh schematics and code (will post only relevant parts of circuit) :D Hey, I also have no idea about non mux led displays. :D
i want to make big led matrix display but i dont know how to start i know how to use pic . pls can u help me ? what is the standard siz of led matrix? what alternative methodes do i have for making the display and what is the avantage and disadvantages of those methodes tnx
Hi edaboarders, I do not really understand how to use the ULN2003a for my dot matrix project. The matrix led that I have is common anode, I connect the PORT B of my pic to the ULN2003. The output of the ULN goes to the row of the matrix, the PIN 9, of the ULN is connected to +5V and the PIN 8 to GND. (...)
sorry sir..actually i did not even draw my schematic out using any software. i'll base on the source code to connect my leds in my source code as i attach.. PORTB is GND and PORTD is the output/vcc .
hello i have made a new web page recently, showing these two projects, and everything else that I have. I also have my own BBS now: I would welcome discussion about: -led multiplex -low power pic circuits: dc/dc converter, small batteries, solar cells -unusual clocking methods, fo