An idea / pointers / risks?

[Heiki “Repentinus” Ojasild]

On 09/13/2014 02:48 AM, Allan Irving wrote:
> First thing, heat + plastic. Bad idea? Any suggestions as to how to place or manipulate the heat sink and CPU to reduce melting or danger?

"Plastic" is a term far too general. Most Lego blocks are made of ABS¹,
and its properties vary depending on the precise formula employed by the
manufacturer. For an example of common parameters see ². Unless you
intend to ask Lego's ABS supplier for the precise parameters of their
variant of ABS, I would suggest placing the heatsink, CPU, and GPU as
far away as possible from the sides of the enclosure. I would also
suggest placing an additional temperature sensor at the Lego bricks
closest to the heatsink and use it to limit processor speeds if necessary.


¹ http://lego.wikia.com/wiki/Acrylonitrile_Butadiene_Styrene
² http://www.dynalabcorp.com/technical_info_abs.asp

Cheers,
-- 
Heiki “Repentinus” Ojasild
Fellowship Representative
Free Software Foundation Europe
mailto:repentinus at fsfe.org
xmpp:repentinus at jabber.fsfe.org
http://blogs.fsfe.org/repentinus/

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