P2-EVAL 3D Printed Base

Cluso99

Here is a 3D printed base. It has a 2mm thick base with 2mm higher standoffs around the mounting holes of 2.9mm, and 2mm around the entire edge. It's just under the edge of the pcb. The holes take M3 screws 5mm long so you can screw into the plastic without nuts. Note the holes are marginally off the physical pcb mounting holes (maybe 0.2mm???) but the screws do their job nicely so I didn't bother changing the design. I used 10% infill and my Ender 3 took a little under 2 hours to print it.

JRoark

Thats pretty nifty, Cluso!

Cluso99

It's quite slippery so it really needs 4 bumpons or little discs/squares of the non-skid mat near the corners. My wife might get upset if I steal one of the mats

evanh

I've purchased a peltier plus some ceramic fins to match. Just need to figure out how to attach them to the bottom of the Eval Board now. The heatsink holes are 48 mm between centres, whereas the Eval Board is 40 mm between centres.

Should allow me to simulate a wide range of ambient temperatures.

Yanomani

3M has a line of thermally conductive adhesive transfer tapes.

Four thickness-grades to select from:

8805 - 5 mils
8810 - 10 mils
8815 - 15 mils
8820 - 20 mils

https://multimedia.3m.com/mws/media/122119O/3m-thermally-conductive-adhesive-transfer-tapes-8800-series.pdf

Hope it helps you.

P.S. USA Frozencpu dot com has some models/sizes for cheap...

https://frozencpu.com/cat/l2/g8/c487/list/p1/Thermal_Interface-Thermal_Pads_Tape.html

VBBSim

If I put a P2 in a small plastic enclosure not much bigger than the P2 itself, is the heat generated such that I would need fan?

kwinn

VBBSim wrote: »

If I put a P2 in a small plastic enclosure not much bigger than the P2 itself, is the heat generated such that I would need fan?

Depends on the code running on it, the clock speed, and the number of cogs and other hardware in use. What are you planning to do with it?

VBBSim

It's a virtual peripheral front-end module which could be required to run full speed so if it's theoretically possible to require a fan in a small enclosure I will need to design it in. I need to spend some time looking at the new power numbers of the rev 'C.

evanh

Here's some early burn testing - http://forums.parallax.com/discussion/comment/1482622/#Comment_1482622

Program 0 is most likely typical use case.

evanh

Yanomani wrote: »

3M has a line of thermally conductive adhesive transfer tapes.

Thanks for the pointer. Not available from local stockists sadly. I'll do some more looking ...

Tubular

https://www.jaycar.com.au/thermal-transfer-tape-100x100x0-5mm-pk-2/p/NM2790

Yanomani

And, directly from Good-Old-Times benchs...

Perhaps, four of those solder tabs could be used (Z-bent), to help centering the whole fixture...

https://media.digikey.com/Photos/Keystone%20Elect%20Photos/MFG_4729.jpg

evanh

Tubular, you beauty! The local shop in town even has them stocked. It'll be tomorrow now though.