15

There has been some comment about suitable enclosures for the Pi and its temperature behaviour.

Are there measured data for this?

  • 1
    Are you asking how hot it gets? – Jivings Jun 20 '12 at 10:01
  • @Jivings I'm asking for temperature data relating to the Pi and its enclosures. – image_doctor Jun 20 '12 at 10:06
  • 1
    There is bit of info in here: raspberrypi.stackexchange.com/questions/105/… – Maria Zverina Jun 20 '12 at 10:12
  • It is better to update your question in response to requests for clarification in comments, that way all of the information needed is in the question, not spread out in the comments. Also, it means that people can tidy up (delete) their comments when their request has been dealt with. Ideally questions should end up with few or no comments to distract from the question. – Mark Booth Jun 20 '12 at 16:40
15

Below are the results from an experiment examining some properties of the Pi in a rough and already mostly sealed enclosure.

The ambient temperature was 30C, the blue dashed portion of the graph represents the time from power up of the Pi until it had reached thermal equilibrium whilst in idle mode.

The second, red, portion of the graph is the temperature when the CPU was placed under full load using a simple PERL script. There was some network I/O , enough to continuously update 'top' running on a remote shell.

The enclosure was the cardboard box that the Pi shipped in, it is a little larger than the dimensions of the board but roughly the same shape as the board itself. Leads were fed in through the flaps at the ends. The 'enclosure' was placed on a flat surface during testing, but was otherwise in free air.

No direct CPU temperature measurements were taken, but the interior case temperature was monitored via a thermal sensor.

This Pi board was overclocked by about 20% to 850MHz.

You can see from the graph below that relatively little temperature rise is evident from running the CPU at full load, perhaps 2 degrees C.

enter image description here

There was no direct graphic activity to contribute to the thermal load.

  • Interesting. Still well below the max operating temperature. So no worries there. Do you have a source for this information or was it your experiment? – Jivings Jun 20 '12 at 10:20
  • @Jivings It was all my own botching ;) – image_doctor Jun 20 '12 at 10:25
  • Very good. Nice work. – Jivings Jun 20 '12 at 10:39
  • Nice answer and original work too!! :) – Maria Zverina Jun 20 '12 at 10:53
  • 1
    @Morgan I used Mathematica, but free software gnuplot or Mathematica clone octave would have done an equally good job. – image_doctor Dec 12 '12 at 15:08

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