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A Xenon flash will cause the Raspberry Pi 2 to freeze

raspberrypi.org

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Re: A Xenon flash will cause the Raspberry Pi 2 to freeze

#3

Post by dietrichepp »

Reminds me of old EPROMs. You can buy special "light sensitive" transistors, but they're really just ordinary transistors with a window in the case, since ordinary transistors are light-sensitive. You can even use an ordinary 1N4148 diode as a solar cell, it just doesn't generate much power.

The fix is simple: apparently, you just have to cover U16, which controls the power supply.

Re: A Xenon flash will cause the Raspberry Pi 2 to freeze

#4

Post by pmalynin »

Explanation: Camera's have capacitors that charge up in order for the flash to happen. They are usually quite powerful. Now during the discharge (aka flash) what you have is very high energy electrons flowing across the wire creating aa magnetic field, coupled with the electric field of the electron you get a mild EMP.

And if it is light sensitivity then it should be tested with a bright continuous light

Re: A Xenon flash will cause the Raspberry Pi 2 to freeze

#5

Post by rblatz »

pmalynin wrote: post #4

Explanation: Camera's have capacitors that charge up in order for the flash to happen. They are usually quite powerful. Now during the discharge (aka flash) what you have is very high energy electrons flowing across the wire creating aa magnetic field, coupled with the electric field of the electron you get a mild EMP. And if it is light sensitivity then it should be tested with a bright continuous light

Which is completely incorrect. There is a light sensitive chip on the board. They state which chip it is in the link.
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