backlight LED display rather hot...

[Mylinux]

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.



please comment.

 

[The real Andy]

IT needs some kind of current limiting. Read the data sheet.


"Mylinux" <myLinux@My.com> wrote in message
news:bl8ve4$qq7@imsp212.netvigator.com...

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.



please comment.

 

[Mike Page]

Mylinux wrote:

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.

please comment.

If you can't stand the heat ...

--
Mike Page BEng(Hons) MIEE www.eclectic-web.co.uk

 

[Mylinux]

I
Mike Page <mike@SCRUBeclectic-CAPSweb.BLAMEco.SWENuk> wrote in message
news:3F78B04A.7080106@SCRUBeclectic-CAPSweb.BLAMEco.SWENuk...

Mylinux wrote:
5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.

please comment.

If you can't stand the heat ...

--
Mike Page BEng(Hons) MIEE www.eclectic-web.co.uk

I added LED display ( backlight) for my linux box and wrote up the internal
status for that. It is getting hot over a period of time. I let it on the
whole nite. it looks fine. NO burn up.
>

 

[Joseph Casey]

The backlit LCDs I have used needed a current limiter to be added.
Usually a resistor in series with the power supply is sufficient.
Regards,
JC


Mylinux wrote:

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.

please comment.

 

[Vadim Borshchev]

Mylinux wrote:

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.

Try this: http://www.nerdlabs.org/tools/ledcalc.php

HTH,

Vadim

 

[J.K.]

"Mylinux" <myLinux@My.com> schreef in bericht
news:bl8ve4$qq7@imsp212.netvigator.com...

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.



please comment.

Hy,

for my 40 X 2 LCD backlight i connect a 4R7 / 5W resistor in series to limit
the current!

JK

 

[Harrie Geerts]

"Mylinux" <myLinux@My.com> schreef in bericht
news:bl8ve4$qq7@imsp212.netvigator.com...

5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.



please comment.


Use 5,6 ohm resistor if 16x2

 

[DJ]

On Mon, 1 Dec 2003 20:55:07 +0100, "Harrie Geerts"
<harriegeertsDITWEGHALEN@home.nl> wrote:

"Mylinux" <myLinux@My.com> schreef in bericht
news:bl8ve4$qq7@imsp212.netvigator.com...
5 V +ve and gnd are connected to the computer power supply.
backlight LED display rather hot...higher than I read from the spec.



please comment.


Use 5,6 ohm resistor if 16x2

The following page details the calculation
http://www.splatco.com/splat/skb/skbredir.htm?toc51527.htm?458.htm