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wraggster
June 24th, 2012, 23:15
http://hackadaycom.files.wordpress.com/2012/06/raspi3.png
[Remy] has access to a very nice Fluke thermal camera, so when his Raspberry pi came in he pointed the thermal camera at the Raspi (http://www.geektopia.es/es/technology/2012/06/22/articulos/se-calienta-el-ordenador-raspberry-pi-estudio-de-sus-temperaturas-en-funcionamiento.html) (Spanish, Google translation (http://translate.google.com/translate?sl=es&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.geektopia.es%2Fes%2Ftechnology% 2F2012%2F06%2F22%2Farticulos%2Fse-calienta-el-ordenador-raspberry-pi-estudio-de-sus-temperaturas-en-funcionamiento.html&act=url)) to see how far this neat computer could be pushed before it overheated.
There are three main sources of heat on the Raspberry Pi: the voltage regulator, theUSB/Ethernet controller (http://www.smsc.com/media/Downloads_Public/Data_Briefs/9512db.pdf) and the Broadcom SoC (http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf). At idle, these parts read 49.9° C, 48.7° C and 53° C, respectively; a little hot to the touch, but still well within the temperature ranges given in the datasheets for these components.
The real test came via a stress test (http://weather.ou.edu/~apw/projects/stress/) where the ARM CPU was at 100% utilization. The Broadcom SoC reached almost 65° C while the Ethernet controller and regulator managed to reach the mid-50s. Keeping in mind this test was performed at room temperature, we’d probably throw a heat sink on a Raspberry Pi if it’s going to be installed in an extreme environment such as a greenhouse or serving as a Floridian or Texan carputer.
Thanks [Alberto] for sending this in.

http://hackaday.com/2012/06/23/checking-out-the-temperature-of-a-raspberry-pi/