Register to reply

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

by PrashntS
Tags: compact, device, fact, flash, lumia, work, xenon
Share this thread:
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?
Phys.Org News Partner Engineering news on
A spray-on light show on four wheels: Darkside Scientific
Research project on accident-avoiding vehicle concluded
Smaller artificial magnetic conductors allow for more compact antenna hardware
May13-13, 09:16 AM
Borek's Avatar
P: 23,716
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
PF Gold
jim hardy's Avatar
P: 3,743
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: 23,716
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: 572
Most cell phones I have seen use LEDs.

Register to reply

Related Discussions
Why is the Norelco 1.1kW step-down device so compact? Electrical Engineering 6
Calculating resistance of xenon flash tube Electrical Engineering 0
Will this power supply work for my device? ! Electrical Engineering 8
Thermodynamics- work in a cylinder piston device with spring Engineering, Comp Sci, & Technology Homework 4
Why wouldn't this device work? General Physics 35