Raspberry Pi 2 freezes from flash

On February 7, a participant at the PeterO Forum Raspberrypi.org reported that he had discovered an unusual problem with his new Raspbery Pi 2.

I have discovered that my PI2 is camera-shy!
Flash drive causes an instant power off!
It has been done each time.

I found my Pi2 shy of cameras!
Attempting to photograph the card with a flash causes it to turn off instantly!
I photographed it three times, and each time it happened again.

')


Other forum participants soon also discovered this problem in their copies of raspberries. What exactly is the cause of the temporary failure of the mini-computer: a flash of light or an electromagnetic pulse of the flash power supply circuits is still unclear. The pun is that the light itself is also electromagnetic radiation.


Xenon flash spectrum. Clearly visible powerful energy peaks in the near infrared range throughout its length.

Presumably, the problem lies in the selected controller of the switching power supply (located near the HDMI port, denoted as U16), which is unstable to the intense emission of xenon lamps.



Forum users have suggested that under the U16 chip marking is hidden chip NCP6343 .

It is noteworthy that even on a completely de-energized RPi2, short-term voltage spikes up to 3 volts are observed when it is irradiated with a xenon flash.

.

The charge does not react to mobile phone flashes in any way; only xenon flashes cause a problem. It is not known whether the manufacturer is going to recall the defective boards and release a new revision.

So far there are only two solutions:
1) do not take RPi2 photos with flash;
2) place the RPi2 in an opaque case.

PS

Meanwhile, RPi2 is already on the market, and you can finally buy it on Amazon to experiment with the flash .


Raspberry PiTM 2 Model B Project Board - 1GB RAM - 900MHz Quad-Core CPU