Search Engine www.edaboard.com

117 Threads found on edaboard.com: Led Matrix Pic
You need a microntroller, a RS-232 cable to establish a serial connection between the PC and microntroller and control the led matric display from PC using the microntroller or make the microntroller to control led matrix display intelligently by making some small program you uploaded to microntroller device itself. One good book is this: (...)
I've got a 8x5 led matrix, with common anodes and cathodes lined up. Now, of course, I can command it from a uc (like a big pic, 16f877) but it's not too bright, because the pic can't really source too much current, and it has to be multiplexed. So, I want to build a power level for it, with transistors. Of course, we can (...)
ASA to ALL im eorking on led matrix display consists of 16X16 led matrix can any body tel me what will the appropriate timmer1 relode value for this..... and why if you explain so i clear my concpts for scanning your input will be highly apprictaed thx
im planning to make my own led matrix display which will be interface to the PC through parallel port.. I
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 all 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
hello i am about making led matrix project like mr ilker_32 posts here but my problem is the short memory of pic 16f877a i need help for using an external memory like 24c64 to save my text in it and how to programe it via rs232 and how to call my messege saved into 24c64 and display it on m
hi, i need help about 7x7 led matrix.. any idea? links? source?
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. (...)
hello friends I bought an led matrix 8x8 (3nm) But i don't know how the diagrams !!!! Please help me the connection (Rows and Columns Connection ) please see the images 658826588365884
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 (...)
Hi If anybody know any hardware details about the moving pannel display for led matrix, whcih displays graphics also. Is there is any character map generator IC? pl give the implementation details how can we address each led individually. I will be using 89C51 for the implementation of the project Every suggestions (...)
i try to make a rotating text on eight 7x7 led matrix displays with two max6952 IC's how can i connect a microcontroller to this chip ( PINS DOUT, CLK, CS, and DIN) Link to max6952 Please give me a schematic with software
Hello, There are a couple of projects on this subject on the forums, just search for moving message display or led matrix. However all of them uses a microcontroller of some sort. I don't think you can do it without one since it is programmable? Unless you use the PC parallel port or something like this. Regards, Gam
Hi, Search Elektroda forum: ................
Hello boys, Does anyone used the max6953 to drive 4 5x7 led matrix displays? I would be very grateful for some sample code to address the max6953 from a pic(16f84A). I have difficulties understanding the protocol from the datasheets. Thanks Nikos Geronikolos
Hi, As far as I can see from datasheets you can replace 2 74hc595s and 2 ULN2803 by one STP16C596. There are two differences: 1. ULN2803 has greater current sink capability (500 vs. 120 mA) 2. STP16C596 has courent sources so that you don't need resistors in series with led's, and you can regulate currents through all leds by one resistor only
Hello everybody I want to make one project that support to my Master programme. That project is pic (16F628A) accepts the every character from usb and display on the led matrix array .The character display is at least 10 character and more how to accept the character . Can anyone help me and Thanks.
when using my pic simulator. there are outputs. but in implementing my design, there are absolutely no outputs visible. what is the correct way to connect pin 1 of pic16f788? what about pin 11,12,31,and 32? what about pin 13 and 14?:cry:
Hello Friends, I am a hobbyist, and enjoyed my time learning pic microcontrollers. I have developed a barely basic, pic training kit for my friends. This kit is based upon pic 16F628A @20MHZ, and comes complete with a training manual, and PROTON-BASIC lite compiler. The training manual takes you through all the steps, from installing the (...)
Hi for all, I use led driver (picture 1) drive led matrix 5x7 (one led is 5mm, picture I buy led matrix but larger with 2x5mm led (5x7, picture old le
Hi, Recently I got a gaming machine display board from ebay, It has 6 5x7 matrix ,32 bar graph led's and 4 MM5450 controllers. Is it possible to use these controllers with AVR or pic to make a moving display..? I am attaching the circuit and the picture of the pcb.. Thanks Surej
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 .
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. (...)
scrolling a 4x3 keypad Scrolling a keypad???? Please explain Nandhu Hi, In my case I'll require 12 pins of my Microcontroller to have 12 button. Actually a keypd is a matrix of button. It is designed like that in order to minimise the number of pins required to read the pressed key. One trick is
i am too try to build led matrix 7 x 30 this project i expand from now i am trying to make this project can store data for display from pc in eeprom pic 16f877a. if you just want to display the message scroll from right to left just add more register for store data and few
hi to all again.. thanks to the one replied to me..but still I have a blurred idea of how will I make my own display..I just have a little span of time.. I'm planning to make a cascaded 5X7 dot matrix display that would be interface in the computer through parallel port.. The project should be a PC- based application and will be run through VB sinc
I need C code to move message on led matrix using MicroC and 74HC595 shift register. OR How to control 74hc595 shift register
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
//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 +
im task to build a 14rows and 40columns led matrix.. as of now i have build a 10x40 led matrix display.. what should i do? im using 74hc595 in my columnss and 74ls154 in my rows with tip147.. and my scroll should be scroll to right and left.. and in static mode.. and also do some blinking.. anyone have a code for this (...)
Hi, You may check links in following forum; There you may see several methods to interface led matrix. It's up to you to decide your port requirement based on led matrix size. Hope this helps you,
MOVING MESSAGE DISPLAY - Sonsivri need help in moving message display using matrix leds(8 bit) - All About Circuits Forum Check these links, may be it will helpful for u.
lots of threads are discussed why don't you search typing led matrix display
had for a while some of Sure-Electronics' led display kit, an led unit with a HolTek HT1632 driving it and 4 * 8x8leds nicely presented. I also bought thier demo-board DE-
Hi guys, Do you have a circuit for AT89S52 with 74HC154 for 8x8 led matrix with 4 or more characters ? And the code as well in C ? Thanks a lot
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
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 (...)
There is no source code (just a hex file which may or may not work), and the circuit has faults in it anyway. It is missing a crystal on the RTC ic, and there are no series resistors for the led matrix, and the microcontroller reset pin is left floating! Just because something simulates doesn't mean it will work (or work well) in real life.
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 (...)
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
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
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
I have acquired the above semi built project and have tried without any success to get additional information about the project. I know it was in EPE prior to 1994 becuase the display board element of the projects was completed at that time. I would be able to get most of the information from EPE's library only they need an actual month and year th
talking electronics have a good display using pic has six buttons for up,down,left,right,store and delete.check it out. www.talkingelectronics.com.or just google talking electronics.com.all the best.
check Dallas/Maxim. There is a chip from led Dot matrix Controller. You will get easy in programmning
Where to find a nice development board for pic 16F8XX (schematics + pcb) with LCD module 4 x 4 matrix keyboard 8 led RS232 interface IIC Serial EEPROM interface bootloader supported regard
:( Hi! I am new at this site my friends to told me that this site help them alot in terms of projects. Our class has been dealing with pic16f84. I am to make digital clock out of pic16f84 and be displayed on an 5x7 led Dot matrix. I have the schematic but then I don't know how to use timer0 of pic (...)
do have 16x16 led DOTmatrix ?
Depending on what you want to do with these led's, I would agree that addressing them in a matrix might be the way to go. Or you could always go with several cascaded SIPO shift registers, such as the 74HC595, but the wiring alone would be a nightmare. :roll: Yet another alternative might be a pair of MAX7221's. That will give you cont