It is the flash of light and has had coverage in various forums=20 (EEVblog, etc). IIRC it's the reset chip that is the culprit. On 19/03/2015 1:38 PM, Randy Dawson wrote: > I don't think it is the flash thats causing the micro to glitch, but the = gnd/voltage spike it sees when the thyristor discharges the flash cap (a fe= w hundred volts) > >> Date: Wed, 18 Mar 2015 23:44:04 -0300 >> Subject: Re: [EE] Xenon flashes/long wave high-intensity light causes th= e Raspberry Pi 2 SMPS chip to glitch >> From: daniel.serpell@gmail.com >> To: piclist@mit.edu >> >> Hi!, >> >> On Wed, Mar 18, 2015 at 11:01 PM, V G wrote: >>> http://www.raspberrypi.org/xenon-death-flash-a-free-physics-lesson/ >>> >>> Not sure if this has been posted here before, but I was looking to buy = one >>> of these today and came across this post. >> --=20 ___________________________________________ David Duffy Audio Visual Devices P/L Unit 8, 10 Hook St, Capalaba 4157 Australia Ph: +61 7 38235717 Fax: +61 7 38234717 Our Web Site: www.audiovisualdevices.com.au ___________________________________________ --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .