Sponsored links

Go Back   MP3Car.com > Mp3Car Technical > Environmental Considerations in Mobile Computing


Reply
 
Share Thread Tools Display Modes
Old 08-10-2009, 07:01 PM   #31
Variable Bitrate
 
tempgp's Avatar
 
Join Date: Jun 2007
Posts: 410
tempgp is on a distinguished road
well it was 105F here in NY, surprisingly my Via M10000 was working jsyt fine along with TM868 monitor. (my comp is in the trunk)

However my home comp stoped wotking caz HDD got overheated

I dont use AC in car nor at home.

So i guess my car pc assembly is much more stable compared to regular desctop tower
__________________
Road Camera HD - Backup Camera Plugin + Mobile DVR BlackBox [Completed]
Bluetooth Cell Phone CallerID [Pre-Alpha]
Custom Button Bash Board - Add physical touchable buttons to your CarPC Project
Centrafuse Garmin Mobile PC Skin - GMPC Rebellium Skin
tempgp is offline   Reply With Quote
Sponsored links
Advertisement
 
Advertisement
Old 08-15-2009, 11:35 AM   #32
Newbie
 
Join Date: Aug 2009
Location: Port Charlotte, FL
Posts: 38
joe_p is an unknown quantity at this point
A quick anecdote.

I have had a Fujitsu Stylistic 3400S tablet mounted in my car for the past 3 years, two of that in southern California, and the past year in south Florida. Windows are non-tinted.

The machine sits on a post in front of the dashboard at present. Over the years, the machine has been rained on (it's a convertible), it has moisture condense upon it every time I leave the top down at night in the summer, it has direct sunlight shining on it all day when I'm parked at work with the top down, it suffers through immense heat when parked outside at the airport for weeks on end (sunlight on a black convertible top = really quite hot), and is subjected to pretty serious shock and vibration, as it's rigidly mounted to the floor and my car's suspension is quite stiff.

For the most part, everything still works perfectly.

The battery gives about 5 minutes of runtime from a full charge, but then, it's the original. 5 minutes is plenty of time to hibernate, so it's not a problem. When it is very cold (say, 40°F or below) the display is dim, but has never completely failed to energize. The touchscreen is somewhat unresponsive, however this is sort of a known issue with these. When I hit a particularly hard bump, the display will occasionally go on the fritz, requiring a reset. This happens once every month or two, on average. The hard drive, surprisingly, is still error free and performing perfectly. Likewise, the external connectors (power, USB, PCMCIA) have suffered no corrosion and still work perfectly.

In other words, it seems no worse for wear for a computer that is nearly ten years old.

The only downside is that the supposedly outdoor viewable screen isn't all that good. When I have the top up on the car, then it's great. With the top down and sunlight hitting the screen, it's difficult to read. Impossible if I have sunglasses on. For a hardtop car however, it would be fine.
joe_p is offline   Reply With Quote
Old 08-15-2009, 11:36 AM   #33
Newbie
 
Join Date: Aug 2009
Location: Port Charlotte, FL
Posts: 38
joe_p is an unknown quantity at this point
A quick anecdote.

I have had a Fujitsu Stylistic 3400S tablet mounted in my car for the past 3 years, two of that in southern California, and the past year in south Florida. Windows are non-tinted.

The machine sits on a post in front of the dashboard at present. Over the years, the machine has been rained on (it's a convertible), it has moisture condense upon it every time I leave the top down at night in the summer, it has direct sunlight shining on it all day when I'm parked at work with the top down, it suffers through immense heat when parked outside at the airport for weeks on end (sunlight on a black convertible top = really quite hot), and is subjected to pretty serious shock and vibration, as it's rigidly mounted to the floor and my car's suspension is quite stiff.

For the most part, everything still works perfectly.

The battery gives about 5 minutes of runtime from a full charge, but then, it's the original. 5 minutes is plenty of time to hibernate, so it's not a problem. When it is very cold (say, 40°F or below) the display is dim, but has never completely failed to energize. The touchscreen is somewhat unresponsive, however this is sort of a known issue with these. When I hit a particularly hard bump, the display will occasionally go on the fritz, requiring a reset. This happens once every month or two, on average. The hard drive, surprisingly, is still error free and performing perfectly. Likewise, the external connectors (power, USB, PCMCIA) have suffered no corrosion and still work perfectly.

In other words, it seems no worse for wear for a computer that is nearly ten years old.

The only downside is that the supposedly outdoor viewable screen isn't all that good. When I have the top up on the car, then it's great. With the top down and sunlight hitting the screen, it's difficult to read. Impossible if I have sunglasses on. For a hardtop car however, it would be fine.
joe_p is offline   Reply With Quote
Old 08-15-2009, 02:49 PM   #34
Maximum Bitrate
 
Join Date: Dec 2008
Posts: 617
trader007 can only hope to improve
Quote: Originally Posted by joe_p View Post
The only downside is that the supposedly outdoor viewable screen isn't all that good. When I have the top up on the car, then it's great. With the top down and sunlight hitting the screen, it's difficult to read. Impossible if I have sunglasses on. For a hardtop car however, it would be fine.

this caught my attention, because more then a few times already i have noticed how well the new EBY701 sunlight readable budget monitor works in the sun, with sunglasses on. it is a few levels above anything else on my dash or radio, very surprising for basically the cheapest 7" touchscreen out there with 'transflective' properties.


ABOUT THE TRUNK COOLING-

i do not understand the need for a peltier in this case. they consume too much power and work very poorly in open air- they are more suited for direct-chip cooling or liquid cooling, and even in those applications they are inefficient at best.

what you are trying to do is cool the ambient air to the point where the heatsinks that are on the chips themselves can directly cool the hardware.

i would just make a simple induction vent from a cool low spot on the car- one that couldnt let water in even if your car is undercarrige washed. outside air may get to 50c, but that is plenty cold enough because you are constantly feeding it, and the moisture in the air evaporates too- that gives you better cooling. this way, your entire cooling system would be powered by the computer. with a peltier setup, one large enough would likely need external power... meaning it would only be on if your car is running.

the exhaust could be the same, if needed at all.. but if your hardware cannot handle ambient air cooling i would get better hardware honestly.

or, you could even do what your car does- and put a watercooling system on your motherboard and hardware. have the radiator in the front grill...

Last edited by trader007; 08-15-2009 at 03:08 PM.
trader007 is offline   Reply With Quote
Old 08-15-2009, 05:07 PM   #35
Newbie
 
Join Date: Aug 2009
Location: Port Charlotte, FL
Posts: 38
joe_p is an unknown quantity at this point
Quote: Originally Posted by trader007 View Post
this caught my attention, because more then a few times already i have noticed how well the new EBY701 sunlight readable budget monitor works in the sun,

Well, it's a ten year old machine that was not exactly cutting-edge when it was new. I've recently purchased a slightly-used transflective Lily (not sure of model #) which I'm expecting to arrive early this week. Very anxious to see how it turns out- hopefully I'll finally be able to retire the ole' Fuji.



Quote:
or, you could even do what your car does- and put a watercooling system on your motherboard and hardware. have the radiator in the front grill...

Heh. Actually, you reminded me of a setup I saw once by one of these fellows who is just fanatical about overclocking cheap CPUs. The entire motherboard (and all related hardware) were placed in the bottom of a rectangular fish tank which was filled with mineral oil. The mineral oil was then circulated through a common household freezer.

No reason you couldn't enclose the machine in a watertight ABS enclosure and pump the mineral oil through a small heat exchanger in the front of the car.

Well, one reason I can think of, but that would presume that this whole business of putting computers in the car was grounded in sanity to begin with.

Last edited by joe_p; 08-15-2009 at 08:47 PM.
joe_p is offline   Reply With Quote
Sponsored links
Advertisement
 
Advertisement
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Touchscreen Issues w/Hibernation & CNX-P1290 jmciver Power Supplies 0 12-20-2006 08:48 PM
Verizon Novatel 620 issues MobiTekLink Wireless Communications 30 12-02-2005 04:35 PM
To heat sink or not to heat sink ... jnusaira Newbie 5 02-18-2004 10:46 AM
CPU Heat question: Which one would generate less heat? kiztope General Hardware Discussion 6 02-12-2004 03:14 AM
COOLING THE CARPUTER moahdib General Hardware Discussion 33 07-04-2002 09:18 AM



All times are GMT -5. The time now is 09:59 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Copyright © 1999 - 2008 Mp3Car.com Inc.Ad Management by RedTyger
Message Board Statistics