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Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 613 threads matching "led"
You are looking at page 1 of 16.
The most relevant threads are listed first
LED & Resistor befuddlement
Mike Turco - 2004-06-02 02:53:00
I thought this was going to be simple. I have a controller, an LED, a
resistor and a socket. Its a five volt circuit.
I want to plug the LED into the socket in a board. The controller needs to
know whether or not the LED is plugged in, and if the LED is plugged in, it
needs to be able to turn ...
Some info of LED lamp
jenny-edlite - 2007-07-25 02:48:00
If only sereral LED lamps,they can use for a very long time.10,000
hours is no problem.And this is availability only in condition that
the temperature of LED Lamp is about 20 =A1=E3C.
When the LED Lamp install in the slim light box,the temperature it is
impossible to be so low.Normally,it is up...communication between PC and LED display
monika - 2008-08-04 09:14:00
I am using a LED display which has following specifications:
TFI-32x128-37RG 4.76mm Tri-color RS232/Ethernet 6.9"x26.22"x2" 4
lines of English
I have connected it to PC com port and want to send data through the
port.
But when I use hyperterminal to send some data on the LED board, it is n...8051 connect LED, Button, and SPI
suds - 2008-02-17 09:10:00
Hi,
MCU,used 89C51
I am doing a project which involves, interfacing SPI or Microwire 3-wire
bus (DAC receiving data in SPI/Microwire), press button, and LED/Relay.
I dont know which ports need to be used for SPI Data, connecting LED, and
pres button switch. Also need any sample c program...How to build your own LED TV-like color displays?
2005-12-28 02:47:00
There are some companies manufacturing large LED based TV-like, color
display units.
http://www.monstavision.com/
http://www.polycomp.co.uk/led-display-video-&-graphic.htm
http://www.daktronics.com/video_prod/dak_video_products.cfm
http://www.gizmag.com.au/go/4880/
http://engadget.com/2005/...LED Display Driver for use with PIC?
2004-12-07 17:25:00
Hello.
My current project uses a PIC16F873A to output to an already
multiplexed LED Display (Fairchild MSQ6441, 4 digit, 7-segment numeric
display).
I would like to relieve some work from the PIC, so I've been looking
into LED Display Drivers to pick up the slack. I came across the
MAX722...delay in altera cyclone about led
chronoer - 2006-03-09 04:48:00
Dear all
i write a simple test for led on altera cyclone board by jtag
protocol
such as following: led[0] will shine with some frequence
reg [31:0] temp_count=0;
reg direction=1;
parameter delay=23'h600000;
always @( posedge clock)begin
...driving an LED with a 7406 question
panfilero - 2007-02-12 23:00:00
Hello, I have a question about driving an LED with a 7406. Basically
I have an MCU going into a 7406 inverter going into an LED going to a
resistor R and that going to a 5 V power supply. All in series, and
I'm trying to find the value for R that would make this thing work....
here's a sketch ...trouble with logic counters
panfilero - 2007-01-02 00:06:00
Hello, I'm trying to hook up a 74HCT163 to count from 0 to 7 then loop
and keep doing it. I'm having a lot of trouble making sense of the
data sheet on how to connect this thing. I have a 555 chip creating my
clock, it's lighting an LED right now, I took that from the positive
end of the LED a...When LED matching IC BCR204U..............
jenny-edlite - 2007-08-20 03:22:00
Many people look for the IC that can constant the current.We all also
look for a long time.Now,we have found out,It is the BCR204U!
We have test ,and put the design in our LED slim light box.The effect
is very good.
Our Led slim light box become more outlook and attract.
I think this is all mos...Re: Best LCD Graphics controller chip ?
Anton Erasmus - 2004-09-03 14:22:00
On Thu, 02 Sep 2004 20:56:44 GMT, CBFalconer
wrote:
> Anton Erasmus wrote:
> >
> ... snip ...
> >
> > On a related note. Someone suggested in another thread the new OLED
> > displays. These look very promising. Can anyone give a supplier which
> > actualy has a 128x64 (1 or more ...Re: OptoSwitch
Anton Erasmus - 2005-07-12 14:52:00
On 11 Jul 2005 17:38:53 -0700, ggold6@gmail.com wrote:
> Hi All,
>
> This is for a simple home project i'm cooking up.
> I need an optical component that signals high (or low..) as a beam it
> emits is interrupted (basically, what the had in the old elevators to
> open the door if somebody ...Best way to get 2.5 volts from somewhere? (Vcc = 5 volts)
=?ISO-8859-1?Q?Tom=E1s_=D3_h=C9ilidhe?= - 2008-05-13 14:27:00
I've got a bi-colour LED. It has two pins. Internally it consist of
two LED's in parallel except they face in different directions.
I'm looking into ways of using one micrcontroller pin to control the
LED as follows:
Pin High = Light up Red
Pin Low = Light up Green
Pin as Input...Integrated LCD/LED display and numeric keypad
klam - 2006-11-24 07:44:00
Hi Folk,
I'm going to build a control system. And I want to find a low
cost integrated LED/LCD (with one or 2 line is enough) display with a
numeric keypad that can connected using RS232 interface (or USB). It
seems that there are many separate RS232 numeric keypad and simple
LCD/LED d...Re: PICs, I2C and sensors
Wolfgang Mahringer - 2005-02-08 14:25:00
Hi Fred, Hi Antti,
Like to add just two comments.
i) The current through the IR-LED should not be more than
10 mA if you want to control the led by a PIC.
ii) Have in mind, that an IR phototransistor (the device
built into your "photo interruptors") uses infrared light,
not visible light...ready to run 32bit controller
Paul Geisler - 2010-06-02 07:52:00
Hello,
does anybody know a more powerful Atmel AVR pendant?
Is there any 32bit controller that can make a LED blink with only
controller, battery, resistor, LED?
thanks very much
Paul
...Driving LED with PWM, Beginner's Question
syr123 - 2009-02-17 18:30:00
Hi all!
True beginner here, but was very excited to find this site. I would
greatly appreciate if someone could shed some light on whether or not I am
going about a project correctly. Here are the facts:
Using -
PIC16F690 with an external 20Mhz crystal oscillator, powered by 5V (at
300mA...programming 8 character LED with C8051F022
methi - 2005-04-20 13:01:00
Hi,
I am using the Cygnal C8051F022 for the first time and have some
background with C programming. I dont know where to start off with
progamming an 8 character LED with C8051F022 though. Can anybody give
me some ideas about this. Would be very helpful.Thanks,
Methi
...simple question
2005-05-05 08:04:00
Hello,
I am getting my feet wet with a C8051F005. I am experimenting with C
and ASM programming for it. Using sample code I have been able to play
around with the LED (its associated with P1.6). I want to know how I
can create a simple program to toggle on and off the LED with the built
in SPST...Re: Using a LED bi-directional opto coupler
Anton Erasmus - 2006-05-11 12:30:00
On Thu, 11 May 2006 09:05:26 +1000, Peter Jakacki
wrote:
[Snipped]
>
> The single led coms circuit (I hate trying to do ASCII circuits)
>
Download AACircuit from http://www.tech-chat.de/index.html
This is a CAD to draw ASCII circuits.
Regards
Anton Erasmus
...AVR and dim LEDs.
artswan - 2006-12-02 09:52:00
Hello all. I have been working with PIC microcontrollers for over 2
years now and I am familiar with and like them. However, recently I
have started dabbling with Atmel AVR microcontrollers to see what they
have to offer. Especially, since they seem quite popular these days and
are showing up in...very strange DSP problem
Simone Winkler - 2004-03-16 04:17:00
Hello!
I've got a small programm that lets a LED blink on my DSP. It's a
TMS320F2812 on a ezDSP F2812 board.
The program didn't seem to work until I once disconnected and reconnected
power supply. I also changed one jumper on the board to another position
(where the led is always on) and back...Searching for 8-digit 5*7 LED matrix display driver
Stef - 2004-06-11 09:42:00
Hi all,
I am searching for a driver for 6-8 digits of 5x7 LED matrix displays.
All I can find seems to be the 4-digit MAX6952/3 chips. Two of these
would ofcourse work, but that requires a lot of space and they are not
cheap either. I do not really need all the font functionality etc. As
long...Re: MicroC and 8051 pin input
Frank Bemelman - 2004-11-24 18:02:00
"Blaketheturtle" schreef in bericht
news:f55076af.0411241355.3cc7a92d@posting.google.com...
> Hi. I'm trying to count the number of times P3.3 on the 8051 goes low.
> The C code I've generated doesn't give me any errors but it isn't
> working either. Can any of you offer some pointers? The...Re: So... What are the alternatives? Was: I don't use an RTOS because...
Guy Macon - 2005-01-23 16:11:00
Paul E. Bennett wrote:
> An interesting aside is that, in system specs I usually get, they demand
> that the response to the pressing of any button, operating any switch or
> clicking any mimic icon, is no more than 500ms. I have found that for items
> that take a long time to get to wher...PPC405 sleep?
Bo - 2005-02-16 11:43:00
I am trying to put the PPC405 asleep on a VirtexIIPro ML310 Xilinx
development board and not have a lot of luck. I'm running VxWorks and have
written a little application that toggles an LED so that I know the task is
running. I've tried two methods--with drastically different results-- but
...Re: using a LED as a light sensor
Deep Reset - 2006-06-16 11:15:00
"BrunoG" wrote in message
news:4492c725$0$991$ba4acef3@news.orange.fr...
> "Rufus V. Smith" a écrit dans le message de news:
> 44903395$0$28047$88260bb3@news-taz.teranews.com...
> >
> > "BrunoG" wrote in
> > message news:445d31a5$0$19698$8fcfb975@news.wanadoo.fr...
> > > H...LED Display
ratemonotonic - 2007-09-06 09:57:00
Hi All,
I am working with a big LED display which interfaces with the PC by
RS232 (9600 baud,no parity , 2 stop bits , 8 bit, no hardware flow
control ).
I am trying to write my own application using cygwin on vista using
open , read and write function calls. Every thing works data is
commin...Redhat GDB Debugger problem with 80200EVB board. I got the error "Remote failure reply: E03"
2005-07-06 13:04:00
I am working on a university research project and I got this problem. I
tried to use Redhat GDB debugger to send an exe program to 80200EVB
board in Microsoft window 2000. I can successfully connect the 80200EVB
board by the serial cable, and Redhat GDB debugger can detect the
connection. The ta...Re: Are there online courses for embedded sys?
Tom Sheppard - 2004-07-30 18:45:00
In article ,
"Mark A. Odell" wrote:
> Check out Jack Ganssle's web site.
Jack seems to like my online course. He gave it a quick review and gave
me permission to post a short comment. It's based on the 4-day
instructor-led course I offer (although only in volume now,
unfortunatel...Driving tri-state LED matrix
=?ISO-8859-1?Q?Tom=E1s_=D3_h=C9ilidhe?= - 2008-05-30 08:18:00
The objective is as follows:
uC pin set as output high: The Green LED lights up
uC pin set as output low: The Red LED lights up
uC pin set as input: Both LED's are off
There will never be a time when both LED's are lit.
Here's what I'm currently thinking of for th...Help newbe with 16F87
2008-02-24 23:00:00
Can't get it to light a LED. I'm using MPLAB with CC5X compiler and
WinPIC programmer with an RCD programmer. Here's the program:
Compiles and programs with WinPic ok.
void main( void)
{
OSCCON= 0x7C;
PORTB = 0x00;
TRISB = 0x00; //outputs
while (1)
{
PORTB=1;
}
...Jellybean barcode driver part?
larwe - 2005-08-25 11:34:00
Is there such a thing as a jellybean 74- or 4000-series part that takes
a binary or BCD input and drives a bar graph LED from it?
I need to drive an 8-LED bar graph from a 4-bit data source with the
minimum of components, and right now the simplest option appears to be
a micro (well, or a PAL,...Re: Using C to program the 8051 family
Alaric B Snell - 2004-01-05 08:32:00
Albert Lee Mitchell wrote:
> Then, as you begin to add your code, each word (think module or
> sub-routine) is incrementally compiled and immediately available for
> interpretative execution in real time.
As an example of this in practice, considering writing a driver for a
bank of sta...Re: LED Display Driver for use with PIC?
CBarn24050 - 2004-12-08 09:01:00
> Subject: Re: LED Display Driver for use with PIC?
> From: Noel Henson noel@noels-lab.com
> Date: 08/12/2004 00:34 GMT Standard Time
> Message-id:
>
> jut.shanahan@gmail.com wrote:
>
> > Hello.
> >
> > My current project uses a PIC16F873A to output to an already
> > multiplexed...Re: microcontroller AT89S52 programing advice
Neil - 2006-07-10 01:23:00
bromio wrote:
> im required to make a digital clock , i made several codes using
> iteration for delay which give not perfect delay. So i want to have
> suggestion about how to use timer interrupts to have perfect 1 sec
> delay each time. ive written code please see am i using interrupts
> ...[Slightly OT] Eurovision backdrop screens
Mike G - 2007-05-14 06:45:00
Firstly, my apologies to our friends over the herring pond for the
Euro/UK-centric nature of this post (although I'm sure you have
similar things in the US).
Watching the Eurovision Song contest on Saturday night, I was
impressed by the LED displays on both the backdrop and stage.
What sort...PIC18 transistor LED drivers
Chuck - 2004-10-20 15:18:00
Happy Halloween!
Last year I built a collection of plywood pumpkins to stick in the
yard on Halloween night. I installed superbright LED's in the eyes,
nose, mouth, etc and was pretty pleased with the results. This year I
want to animate the LED's.
I bought a DLP-245PL which uses a PIC18L...Re: Using a LED bi-directional opto coupler
Anton Erasmus - 2006-05-15 14:13:00
On Thu, 11 May 2006 12:52:35 -0400, CBFalconer
wrote:
> Anton Erasmus wrote:
> > wrote:
> >
> > [Snipped]
> > >
> > > The single led coms circuit (I hate trying to do ASCII circuits)
> > >
> > Download AACircuit from http://www.tech-chat.de/index.html
> > This is a CAD to ...Zigbee 2.4 GHz experience
2006-09-23 04:26:00
Hi folks,
I wanted to share some experiences and thoughts about some Zigbee tests
I've done recently.
I purchased from a vendor a 2.4 GHz Zigbee kit, and programmed 2 boards
in order to do following ping test:
1. The first one is the PAN coordinator.
2. The second one is a simple de...