Author Topic: Max Temperature (and issues) for a PAW  (Read 3063 times)

Robski

Max Temperature (and issues) for a PAW
« on: May 09, 2017, 03:36:00 pm »
I have a chum who has, and loves, a PAW Classic.
He has it installed in 'plain sight' under a bubble canopy.
We were all out in Scotland last weekend with barely a cloud in the sky.

I'll let him explain further:

Yesterday I took off on our way up to Plockton (Janet was trying out Geoff’s spare ANR headset) and I was getting a terrible white noise in standby mode, so I got Janet to swap back to her own headset, still had the white noise, so I tried resetting settings on the (Trig TY91) radio, still got white noise! Janet then said the Pilot Aware box was red hot (suppose it had been baking in the sun whilst parked out at Oban). So I removed the power to PA, and suddenly the radio became absolutely perfect again!
PA obviously does not like getting hot! I covered up the PA box with a white shirt whilst parked up at Plockton, and it worked perfectly with no radio interference on our way home to Sleap.
Worth mentioning I think!
Is this an expected 'failure mode'?

Obviously a black box of electronics in a greenhouse is going to have issues, as my chum realises.

Just thought I'd pass this on.

I have a 'white and raspberry' standard Pi case on my home-brewed PAW and have never had such issues, but since I've put it under the dash, and in light of the above, I am now considering putting a fan in the case: should be easy with that case's removable lid!

From a technical point of view would it be better to set the fan to blow cold air into the case, or suck the warm air out?
« Last Edit: May 09, 2017, 03:40:49 pm by Robski »
Rob
If the good Lord had intended man to fly He would have given him more money.

Paul_Sengupta

Re: Max Temperature (and issues) for a PAW
« Reply #1 on: May 09, 2017, 04:21:44 pm »
Many of the US Stratux cases have fans in them, but the fans seem to be where the Bridge board goes on the PAW.

Anyway, the PAW type case is also available in NBC white. Might protect it from a thermonuclear reaction, as long as it's 93 million miles away.

http://www.ebay.co.uk/itm/White-ABS-Plastic-Case-Box-Enclosure-For-Raspberry-Pi-3-Pi-2-Model-B-Screws-/322087615517

exfirepro

Re: Max Temperature (and issues) for a PAW
« Reply #2 on: May 09, 2017, 04:56:32 pm »
Rob,

For those concerned about heat from the sun on coamings, etc., PAW can now be purchased with either the standard black case, or a white case, same as the one suggested by Paul. The processor core temperature is also reported on the PAW home screen, so you can if required monitor this. IIRC max core operating temp is at least 70 C.

There was a thread on here about fans a while back which you might be interested in reading..

http://forum.pilotaware.com/index.php/topic,451.msg5795.html#msg5795

If you decide on this option, please let us know how you get on.

Regards

Peter

Robski

Re: Max Temperature (and issues) for a PAW
« Reply #3 on: May 09, 2017, 10:42:44 pm »
Thanks both for the tips.

I noticed a fan really needs to go in the end or side.

Will suggest the white case to my chums!
Rob
If the good Lord had intended man to fly He would have given him more money.

Paul_Sengupta

Re: Max Temperature (and issues) for a PAW
« Reply #4 on: May 09, 2017, 11:11:13 pm »
I'm sure it'll be all white...  ::)

Robski

Re: Max Temperature (and issues) for a PAW
« Reply #5 on: May 11, 2017, 06:04:17 pm »
I think we have the necessary two wrongs so that might make it white...  :o
Rob
If the good Lord had intended man to fly He would have given him more money.

Ian Melville

Re: Max Temperature (and issues) for a PAW
« Reply #6 on: May 12, 2017, 06:08:58 am »
If the kit is from China, it may be two Wongs  make a White

exfirepro

Re: Max Temperature (and issues) for a PAW
« Reply #7 on: May 12, 2017, 11:47:17 pm »
I was always taught that two Wongs DON'T make a White!!

Peter

p.s. this is now getting embarrassingly silly  :-[ :'(