backlight LED display rather hot...higher than I read from t

[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.

20 x truly.

please comment.

 

"Mylinux" <myLinux@My.com> wrote in message news:<bl8vg5$qq8@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.

20 x truly.

please comment.

I am assuming that you refer to an LED backlit, alphanumeric LCD
display module.
This being the case, remember that the LED module still requires to be
current limited, even though it says something in the datasheet that
it's
supply is 5v at approximately 200mA. Put a 1 watt 27 Ohm resistor in
series
with the +5v supply line for maximum current draw/brightness.
Personally I use a 47 Ohm resistor and find the display more than
useable at this level of brightness. If of course, you are not using
such a module, check to be sure, that the LED module is indeed current
limited.


regards
Alastair