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

  1. 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?
  2. jcsd
  3. Borek

    Staff: Mentor

    Why do you think the capacitor is part of a micropocessor? It can be a standard capacitor, mounted separately.
  4. I mean to ask if there is some other work around. Putting massive capacitor in a cell phone is nearly impossible.
  5. jim hardy

    jim hardy 5,460
    Science Advisor
    Gold Member
    2014 Award

  6. Borek

    Staff: Mentor

    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.
  7. Most cell phones I have seen use LEDs.
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