72 Threads found on edaboard.com: Led Display Using 8051
I once wrote a scrolling text code for 8 dot-matrix displays in assembler. It shouldn't be hard to implement it in C. You may start
Microcontrollers :: 14.09.2012 13:43 :: hate :: Replies: 6 :: Views: 1730
Use uart to get message from vb software on pc.
Then display on led matrix.
Microcontrollers :: 08.07.2010 03:29 :: unaided :: Replies: 7 :: Views: 3160
pls visit Downloads / 8051 Projects / Scrolling Dot Matrix led display using 8051 : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes
Microcontrollers :: 15.12.2010 08:14 :: santoshaxl :: Replies: 1 :: Views: 1153
Scrolling Dot Matrix led display using 8051 / 8051 Projects / Downloads : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes
Microcontrollers :: 09.11.2011 20:56 :: santoshaxl :: Replies: 6 :: Views: 1823
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 (...)
Professional Hardware and Electronics Design :: 20.09.2002 16:37 :: viterbi :: Replies: 2 :: Views: 1825
Search Elektroda forum:
Microcontrollers :: 20.03.2005 12:10 :: hugo :: Replies: 9 :: Views: 4186
I'm building a 256 shades Monochrome led display, it's a 55 x 35 leds matrix.
I intend to use xilinx CPLDs for row PWM generation, an atmel 8051 member uC runs at 33 MHz and a 512 KB RAM chip. I have some questions:
1- Do i have to calculate the frame animation at runtime or i can simply download the whole (...)
Microcontrollers :: 05.07.2005 18:18 :: Bus Master :: Replies: 52 :: Views: 14781
Microcontrollers can be used from simple applications like temperature sensor to very complex things.
if u are referring to a graduation project, u can try these things:
1. Moving LCD/led display using 8051
2. Intellegent car parking system.
the system provides user authentication using simple (...)
Embedded Systems and Real-Time OS :: 04.07.2006 02:52 :: ivar4ever :: Replies: 7 :: Views: 2002
I WANT TO USE 89C2051 AND 7 ROW 64 COLUMN MOVING TEXT led display .
A KEYBOARD PS2 OR OTHER SHOULD BE CONNECTD.
THERE IS A DIYI TOPIC FOR SAME MATTER IN THIS FORUM BUT I AM NOT ABLE TO UNDERSTAND COMPLETE CIRCUIT DIAGRAM AND SOFTWARE OF MY
PLEASE GIVE ME THE COMPLETE
Microcontrollers :: 26.12.2006 22:03 :: sajal1975 :: Replies: 1 :: Views: 1845
You will need to create font lookup tables for all the characters you wish to display. You then use the ASCII code representing each letter of words you wish to display as a lookup in the font table. The best is to break your code into sections such as getting fonts, sending to display, and the scrolling part which is the easiest ... simply (...)
Microcontrollers :: 14.03.2008 17:36 :: davidgrm :: Replies: 5 :: Views: 7770
Contact who can turn your dream projects in to reality. they give you complete schematics, explanations and codes too with Assembled or un assembled PCB's....Good luck
Microcontrollers :: 27.04.2009 02:10 :: pranam77 :: Replies: 2 :: Views: 3797
Do it in steps ..
First, start with AxB matrix ..
Here is an example of 8x8 led matrix display:
Although this one is based on different "horse", but the idea can be tr
Microcontrollers :: 21.07.2010 21:16 :: IanP :: Replies: 2 :: Views: 3097
There are a couple problems
You're calling delay() in your isr and the main loop. It's using the same memory locations for looping in both invocations. They're going to step on each other.
Do you have your logic backwards?
The while(1) loop should display the current picture, and the timed isr change the picture to the new scrolled (...)
Microcontrollers :: 11.08.2011 16:53 :: Hankers :: Replies: 7 :: Views: 3736
Here are some examples:
Decimal Counter using Two 7-segment displays and an 8051
Microcontroller & 7-Segments led display Interfacing
Keil's 4 x
Microcontrollers :: 20.08.2011 02:53 :: bigdogguru :: Replies: 11 :: Views: 1579
Microcontroller World: led Moving Message Dispaly
Microcontrollers :: 27.09.2011 02:53 :: john blue :: Replies: 4 :: Views: 2582
hello friends... i'm doing project in running led display through serial port using 8051... i took this project from a site... i have done a hardware part fully but im not getting output.... im getting partial output.... the port 2 of controller is given to the row of the display.... but there is no changes (...)
Microcontrollers :: 31.03.2012 12:56 :: kelvinmanoj :: Replies: 0 :: Views: 368
i am trying to display capital "H" on 5x7 led matrix using 8051...but i can see the correct output..what is the problem i cant find out...
i have attached the ckt diagram and code here....
P2 is connected with 5 columns and P3 is 7 rows...
void delay1(unsigned int a)
unsigned int i,j; (...)
Electronic Elementary Questions :: 05.10.2012 05:00 :: satyasankar09 :: Replies: 1 :: Views: 236
according to my understanding shift registers can only source current, they cannot sink current.
Who told you that? Take a look at the 74HC595 datasheet:
You'll see on page 6 that the maximum output current is +/-35mA - so, it can source or sink 35mA.
Microcontrollers :: 12.10.2012 15:48 :: FoxyRick :: Replies: 2 :: Views: 660
Perhaps you can help me:
I have just realized a Clock and timer with AT89C2051
in fact it is a clock and a downcounter and other little features.
(the display is on 6 seven-segments led display using MAX7219)
in fact I have realized the downcounter routine using a delay of
1s; Would their (...)
Hobby Circuits and Small Projects Problems :: 11.05.2003 12:46 :: BENOIT :: Replies: 8 :: Views: 1853
For getting right answer use proper forum.
I did it long back using 80c51 & 8279 (keyboard & display not sure if you still get it in market.
If you refer the data sheet of 8279, it clearly mentions how can you connect matrix of led's.
PCB Routing Schematic Layout software and Simulation :: 25.03.2006 02:55 :: centiago :: Replies: 1 :: Views: 2955
I want to find a assembly program, please help.
Develop an electronic lock by using the circuit below, use the 4x3 key pad to implement the door password, door-open key and clear button key.
Use uVision to write the program to check the password-keyed in from the 4 x 4 matrix keyboard. display the word ?PASS? on the led arrays (...)
PC Programming and Interfacing :: 05.11.2006 05:16 :: sky524810 :: Replies: 0 :: Views: 730
hi to every one
i want to make a single/doble line led moving message dispaly
using 8051 micro controller .but i have no information or idea how i can do it ...
Hobby Circuits and Small Projects Problems :: 14.08.2007 13:29 :: halee awan :: Replies: 1 :: Views: 2756
I am working on led display project,
i am using AT89S53(8051) for programming(keil C) . from last three days i
am facing serious problem with communication. I want to communicate PC to led
there is another IC on board provided me, that is MAX1487 and there are only two (...)
Microcontrollers :: 07.05.2008 02:22 :: ermtariq :: Replies: 11 :: Views: 1350
I am recently working on some led multiplex display with PIC.
This parallel type type interfacing is bit more critical and a lot of
shift register or decoder have to use.
But a LCD display is easy to interface to any PIC. They are cheap
& if we use them many port of PIC become free (...)
Microcontrollers :: 08.05.2008 01:22 :: Sayem Ahmed :: Replies: 2 :: Views: 2013
im making the same circiut but on leds, each segment of 5 leds in series, i m using ULN 2003A for all 7 segments? my question is that shall I use 1015 transistor for the common pic of 7 segment???? (for common anode) if each segment uses 20mA current and when all the segment are ON so it will take around 140 mA current which will pass (...)
Microcontrollers :: 04.02.2009 23:34 :: sn_burki :: Replies: 27 :: Views: 13685
Hi, I am implementing an up/down counter with a delay of 1sec(using Timer0) and dsiplaying it on the terminal using serial port at the same time. When i implement only the led display it works but when i add the logic for hyperterminal display it doesnt. But the same terminal display logic (...)
Microcontrollers :: 11.10.2009 22:19 :: shaji001 :: Replies: 3 :: Views: 1609
i m manoj. Acually i m doing the project " led Based Scrolling Message display" for final year of B.E. Uptil now-
1. 10 kit of 10x10 matrix led display we have made.
2. For that purpose i made the driver kit using transistor & resistor.
3. For every rows & colums that driver is given.
4. I have (...)
Microcontrollers :: 09.03.2010 06:15 :: pavalemanoj :: Replies: 1 :: Views: 1021
Hi, today only i av joined in as a new member.
I want to display 5 characters in scrolling format. I have in mind to use 8051, 70LS138 decoder, M54525AGP(7 array transister). Now i av doubt whether for each character do i av to use seperate ucontroller,decoder &array transister:?:
Hope of getting reply sooner.
Microcontrollers :: 08.09.2010 22:55 :: Wakuplil :: Replies: 0 :: Views: 775
for details, here im attached a proteus file that i'm get from from that site im learning (so much thanks for him) . but im modification for 8052 because i dont have avr ic.
i have already test the program and i'm also have implementation on the protboard and it's works.
but i really dont know how to design applic
PC Programming and Interfacing :: 21.09.2010 00:46 :: benny28 :: Replies: 7 :: Views: 1481
I want to build 8 X 8 scrolling led board.
The h/w I m using is using shift registers(74164) & 89s52.
So i want Keil C code for this.
Please help me.
Microcontrollers :: 25.10.2010 08:30 :: pradeep.majale :: Replies: 3 :: Views: 2362
where is the problem?
1. build up second generator by using timer.
2. every second update registers (second,minutem,hour....)
3. send registers to serial port, lcd,led,....
Microcontrollers :: 17.11.2010 15:52 :: bohumilfulin :: Replies: 4 :: Views: 1910
The ready made clock chips available, usually use mains frequency as refernce and thus the accuracy highly depends on the same. But you can get dead accuracy with RTC interfaced with a microcontroller. But In the DS1307 as it uses external cylinderical crystal, the accuracy may not be guaranteed. But using a DS12887 module accurate time can be obta
Business, Promotions, Advertising :: 29.11.2010 07:05 :: pranam77 :: Replies: 7 :: Views: 2239
Hai experts ,
i am new in 8051
I want to do a projects ,ie an led based moving display using 89c51 .Please help me .
Warning! Select correct section before posting
Microcontrollers :: 19.01.2011 04:23 :: thannara123 :: Replies: 2 :: Views: 648
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.
Microcontrollers :: 11.03.2011 07:21 :: malik_zohaib :: Replies: 7 :: Views: 6701
hy! I have to make an .asm or a .c code using 8051 microcontroller and 4 led matrix of 5x7 each, which display in a scheme designed in Proteus a scrolling text (,,TEST") from right to left:
_ _ _ T
_ _ T E
_ T E S
T E S T
E S T _
S T _ _
T _ _ _
Pls, could you help me with tutorials about assembly or c that help (...)
Microcontrollers :: 31.05.2011 19:05 :: Black Vision :: Replies: 3 :: Views: 1496
You have no resistors in series with the leds of the segments. Your display is common anode or common cathode? In any case, open those references:
8051 Interfacings: 7 segment display
Microcontrollers :: 21.11.2011 12:31 :: alexxx :: Replies: 10 :: Views: 507
i wanted to use the timer 2 of 8051 to use it as the multiplexing delay for seven segment led display. So guys if anyone of u know how can i use timer 2 of 8051 please give the pseudocode or C code or assembly code will work too.
Microcontrollers :: 12.04.2012 14:35 :: ucsam :: Replies: 2 :: Views: 530
i'm using proteus isis for the simulation,i have connected 8*8 dot matrix row to 74HC573and to mc 8051 ,but when comes to column i'm confused...how to connect column to current sinker and to shift register ? which chip we can use for current sinker and shift register? How to give inputs to the shift registers? can you provide brief details, and i'
Microcontrollers :: 25.04.2012 11:19 :: youstron :: Replies: 0 :: Views: 728
I want to interface 8870 dtmf ic with 8051
what is the program for ....this when we press 1, 2... like this
Can be more specific ?
You need to decode DTMF using 8051 and show number on 7-seg led or LCD ?
Interfacing 8870 DTMF decoder with 8051
Electronic Elementary Questions :: 14.07.2012 09:04 :: tpetar :: Replies: 1 :: Views: 1244
I am learning 8051 & have interfaced it with leds, lcd, 7 segment leds,etc
I am trying to interface it with a 5x7 matrix led display and soon if successful would go ahead with 8x8 matrix led interfacin also. I tried some bit of coding, am not getting errors but am not getting my required (...)
Embedded Systems and Real-Time OS :: 22.10.2012 04:51 :: Rubina_pinto :: Replies: 3 :: Views: 729
Hi all experts,
nowdays i m working with led dot matrix display using 8051. in which what i want to do is....i want to transmit a string of character by serial UART and display that received string on led dotmatrix display. i had one circuit and a code which is 100% ok (...)
Microcontrollers :: 26.10.2012 06:30 :: hardik.patel :: Replies: 5 :: Views: 371
Raykumar, it is very hard to expect that somebody else will solve your dilemma, your problem is very easy, you need to search on google and read datasheet for 74HC194, it is 4bit bidirectional Sh. R.,
but probably will be better and much easier to use 74HC595 for led moving display,
you also ask for code in asm, without your schematic it is not pos
Microcontrollers :: 20.02.2013 05:44 :: pasicr :: Replies: 2 :: Views: 245
That is complicated case, specialy scaning frequency,
this module use 1/4 scan method, that mean one pin from shift register 595 controll 4 led's,
you must controll via 138 witch row is active, also you must control many 595 via one serial input...
many things for control,
if you are begginer I think is not easy for you,
this need programming
Microcontrollers :: 29.07.2013 14:48 :: pasicr :: Replies: 12 :: Views: 283
Hai all i need a program for control 8051 to bcd 4511 to count down the timer for example port 1 has 8 pins if a select p2^7 means eight minutes want to decrement to zero include seconds to. I need to know how should i program for interface using single ic 4511 to access four segment led
Hobby Circuits and Small Projects Problems :: 12.08.2013 09:42 :: reachrajesh :: Replies: 0 :: Views: 230
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 (...)
Electronic Elementary Questions :: 26.08.2004 00:15 :: djalli :: Replies: 3 :: Views: 4560
Lets have a look at the hardware part of your project ..
First of all, the ADC0804 is an older design utilizing 8-bit data bus that is compatibile with 8048/8051 microcontrollers ..
If I were you I would connect DB0-DB7 of the ADC directly to AD0-AD7 of the 89C52, INTR(5) pin connected to INT0 (P3.2), RD and WR connected to both ADC and SRAM thro
Embedded Systems and Real-Time OS :: 18.01.2006 21:00 :: IanP :: Replies: 1 :: Views: 1259
A microcontroller, FPGA, or even discrete logic can be set up to solve your problem.
First think about the rules and what types of ins and outs your system needs.
For a very basic version:
I invision a 9 bi-color led grid to represent the moves and indicate which player has selcted each square. You may want a 10th bi-color led to indicate w
Electronic Elementary Questions :: 07.02.2006 00:19 :: mrniceguy :: Replies: 3 :: Views: 3426
U need the vector input , the charectors of all output number and try to study raster graphics . This is basic to know to to work with Graphics mode by read manual of 8x8 led ortherwise you must design own library for this job to add some needed functions.
Digital Signal Processing :: 17.01.2012 07:48 :: phongphanp :: Replies: 5 :: Views: 5567
I modified the standard program for linking the DS1620 to an 8051, by displaying the result from the accumulator as a binary temperature display in Port 0, via an led. But when i run it, all the led's light up!! I have 1 led connected to each Port 0 bit. I'm using a AT89C51 (...)
Microcontrollers :: 31.12.2006 06:04 :: nerdspot :: Replies: 0 :: Views: 832
you are using led module which is having all same pins conntected together expect the common ie pin 1 to 1 .
you can use the same circuit as blueroomelectronics
Microcontrollers :: 07.07.2008 03:52 :: rajudp :: Replies: 16 :: Views: 3662