A week ago, began selling of advanced models of mini-computer Raspberry Pi 2, but the first customers came to an unexpected problem. It turned out that the board does not stand the light from a xenon flash camera.
If you take his picture with the flash, the 2 RasPi freezes for a few seconds, and then restarts.
The forum members started a real detective work to find out the true cause of the problem.
There are different versions. Soon found that the LED-flash smartphones do not cause a problem, but it is only xenon. Have come to believe that this is due to the photoelectric effect in the chip NCP6343, which is responsible for the dynamic voltage regulation. This little chip can be seen under the designation U16 in the photo at the bottom left.
When irradiated xenon it receives a large flux of photons in the infrared spectrum, which results in an unacceptable discontinuity of energy due to the photoelectric effect.
Photoelectric effect -issa well known thing. In principle, the chips must be better protected against such interference. Perhaps the problem is only the first batch of Raspberry Pi 2 and fix it in the next game.
In the meantime, and published the first comparative benchmarks old Raspberry Pi Model B + (700 MHz), the new Raspberry Pi 2 Model B (1000 MHz) and BeagleBone Black (1000 MHz). Sensitive to flash the board showed the best result.
Source: xaker.ru
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