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How does the Xenon Flash in Lumia; or, if fact any compact device work

by PrashntS
Tags: compact, device, fact, flash, lumia, work, xenon
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May13-13, 08:53 AM
P: 25
I don't need basics, I know the causes how xenon flash "works" ; I need to know how do they minimise this kind of circuit in microprocessor?

My question: The Flash tubes require kVs of potential difference to work. I am aware that big capacitors are required to make them work. This is okay upto digital cameras where they can put big capacitors.
But cell phones? I read somewhere that microprocessors can't have big capacitors. So how come they work?
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May13-13, 09:16 AM
Borek's Avatar
P: 23,602
Why do you think the capacitor is part of a micropocessor? It can be a standard capacitor, mounted separately.
May13-13, 09:22 AM
P: 25
I mean to ask if there is some other work around. Putting massive capacitor in a cell phone is nearly impossible.

jim hardy
May13-13, 09:52 AM
Sci Advisor
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jim hardy's Avatar
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How does the Xenon Flash in Lumia; or, if fact any compact device work

here's some reading for you

these two describe cellphone xenon lamp drivers

Take a dead one apart and see how they did it.. you can become the expert !
May13-13, 10:03 AM
Borek's Avatar
P: 23,602
From what I have seen capacitors in these devices are surprisingly small. Last year I have replaced the shutter button in my idiot camera, and from what I remember whole flash module was small enough to fit in my mobile - granted, my mobile is not the Lumia, but also the flash module was not designed to be slim.
May13-13, 01:14 PM
P: 564
Most cell phones I have seen use LEDs.

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