Is there any possiblites to brighten up leds

[ikm19]

Is it possible to brighten up led by any software means i mean as we can get fadding light so there will be some where the option to make the light more Bright....
i have heard that it can be done by some hardware changes but i dont know what they are......

May be i am on wrong track of fading lights but can any one explain how the fading lights work in flash file.
Is it That the code send less voltage to leds, If its there then that code can also send more voltage to Leds which will make the leds more brighter.....

[Al]

There only one way to brigthen up leds is to change them to brighter ones :) (Fade code uses PWM, i.e. leds can be only in ON/OFF state)

[ikm19]

I have allready change to brighter one they are in white in colour but now they also seems less brighter for me so was just trying to learn to make them more brighter

[h_r_f]

Hey AL! "LEDs in phones are either ON or OFF"

Fading LEDs go something like this
Bright----------_----__---___--____-__________Off
On is '-'
Off is '_'

What model do you have and what colour LEDs did you have in there before hand?

Red, Yellow, Green Leds require around 2.0V to 2.5V to operate correctly. (Forward Voltage)
They are fed with a constant current around 10-13mA per LED. (Forward Current)
The voltage then changes to its forward voltage.

The white LEDs require a larger forward voltage. If the voltage isn't available they wont conduct the full current.
If for example A white LED has a forward voltage of 4.0V and your battery is 3.6V. the required current won't flow.

There are two ways around this
1) Find a white or a blue led with a smaller forward voltage (Difficult)
2) Build yourself a boost convertor (Very Difficult)

Sorry!

[welshwizard]

put a solder bridge over the right resistors, and it will make them brighter.

www.bluled.co.uk for more info

[h_r_f]

but the leds brightness will fluxuate with chaging battery voltage.
but who cares if they are birght and the right colour :)

[leorick]

I got this circuit diagram from 8210 Service Manual and one question, you can see that;

R310 goes to PIN8 LCDLED_ADJ
R311 goes to PIN14 KBDLED_ADJ

Is the value of the resistance is effecting the Voltage that been given to the LED? Did the lower resistance give more Voltage? Anybody already try this out?

[Nanda]

In fact if you're feeling that your LEDs aren't as bright as you expected maybe the were heat-damaged during installation.

If you apply too much heat, or if you apply heat for too long, you can damage the LEDs and they'll lose some of their brightness as a consequence.

Let's hope this isn't your case!

[liteFun]

contrast adjusting may help too, but it has nothing to do with leds.

i don't know what values you use, but i set with kNokphoenix 12 if using normal display and 18 if inverted.

[h_r_f]

Just a note

LEDs are current devices not voltage.
They have a specified working forward current and the voltage accross them depends mostly on the wave length emited (colour)

For Example: If you had a big chunky red LED with a specified forward current of 10mA it would also state that at that the forward voltage may roughly be 1.4V.

You might want to power it off a 3.6V supply.
Take Vforward from Vss: 3.6-1.4=2.2V
This 2.2V has to be dropped accross a resistor. (remembering the 10mA) So. Ohms law 2.2V / 10mA = 220Ohm

If you shorted this resistor you would not be limiting the current. The LED will have a short life!

I've no idea why I put this here, but I got bored... . . . . . . . . .

[chunkhead]

Nevermind all that messing about! You need to bridge the resistors like Welshwizard said! Visit his site! It's excellent!

[fhchiang]

bluled is down....

where else can i get a bridging guide?

[chunkhead]

If you tell us what phone model, we could post you a picture! ;)