I can't divulge great details since we are building the first machine
and we have competitors that did not get the business, but would like to
grab it if possible.
It sounds like an interesting project.
In the research I have done with remote machine monitoring (and GPS
breadcrumbing) most
On Sun, 17 Jul 2011 06:35:22 -0400
Dave e...@dc9.tzo.com wrote:
Does anyone have any experience in testing for condensation issues?
I operate a couple of 802.11 wireless access points outdoors, year
round. They supply my internet service, so they are mission critical.
I'm in Maryland, so temps
On Sat, 2011-07-30 at 11:23 -0400, Matt Shaver wrote:
On Sun, 17 Jul 2011 06:35:22 -0400
Dave e...@dc9.tzo.com wrote:
Does anyone have any experience in testing for condensation issues?
I operate a couple of 802.11 wireless access points outdoors, year
round. They supply my internet
Dave,
Any possibility of sharing what you indtend to use the equipment for on the
rig? I am a mining engineer in the cement industry and have considered
placing remote electronics on drilling rigs and the mining equipment. Too
many other fires to hold back in the meantime have kept me from
On 22.07.11 10:30, Dave wrote:
Interesting.. so did you have to make any design changes to meet the
95% RH requirements??
No, the LED clock dissipated enough heat to avoid condensation at 95%
RH. With purely dissipative dropping of the 12v to the 2v across each
display segment, it effectively
On 17.07.11 06:35, Dave wrote:
Does anyone have any experience in testing for condensation issues?
When I finished off the development of the first automotive digital
clock used by Ford here in Australia [1], certification testing included
temperature, humidity, vibration, and dust testing.
The
On 7/22/2011 5:43 AM, Erik Christiansen wrote:
On 17.07.11 06:35, Dave wrote:
Does anyone have any experience in testing for condensation issues?
When I finished off the development of the first automotive digital
clock used by Ford here in Australia [1], certification testing
Dan,
Do you use real lacquer (I think that Minwax still sells it) or do you
use some type of polyurethane finish or something like that??
Dave
On 7/17/2011 4:14 PM, k...@gmail.com wrote:
If you go with a standard PC motherboard, I would get a can of clear lacquer
and apply 2 coats to both
On 18 July 2011 13:57, Dave e...@dc9.tzo.com wrote:
Do you use real lacquer (I think that Minwax still sells it) or do you
use some type of polyurethane finish or something like that??
As an example, there seem to be a number of dedicated laquers for
coating PCBs, all with slightly different
On 7/17/2011 7:29 PM, gene heskett wrote:
On Sunday, July 17, 2011 07:25:15 PM dave did opine:
On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote:
Dave wrote:
I'd like to use as many off the shelf devices as possible - PC
boards etc... if possible.
Being a
On Monday, July 18, 2011 03:49:40 PM Dave did opine:
On 7/17/2011 7:29 PM, gene heskett wrote:
On Sunday, July 17, 2011 07:25:15 PM dave did opine:
On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote:
Dave wrote:
I'd like to use as many off the shelf devices as possible - PC
On 7/18/2011 3:52 PM, gene heskett wrote:
On Monday, July 18, 2011 03:49:40 PM Dave did opine:
On 7/17/2011 7:29 PM, gene heskett wrote:
On Sunday, July 17, 2011 07:25:15 PM dave did opine:
On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote:
Dave wrote:
On Monday, July 18, 2011 05:42:32 PM Dave did opine:
Yes.. all you can do is to make it more difficult to remove.
If someone wants it badly enoughthey will get it eventually.
Dave
As long as the customer understands that. Some never do. :( So CYA.
Cheers, gene
--
There are four
On Mon, 2011-07-18 at 17:43 -0400, gene heskett wrote:
On Monday, July 18, 2011 05:42:32 PM Dave did opine:
Yes.. all you can do is to make it more difficult to remove.
If someone wants it badly enoughthey will get it eventually.
Dave
As long as the customer understands
On 7/18/2011 5:43 PM, gene heskett wrote:
On Monday, July 18, 2011 05:42:32 PM Dave did opine:
Yes.. all you can do is to make it more difficult to remove.
If someone wants it badly enoughthey will get it eventually.
Dave
As long as the customer understands that. Some
On 7/18/2011 6:58 PM, dave wrote:
I would/will be interesting to revisit this in 2-3 years and see how it
worked out.
I'll keep that in mind and try and revisit this with the group down the
road.
A solar panel trickle charger is a very good idea.
Dave
Dave wrote:
I'd like to use as many off the shelf devices as possible - PC boards
etc... if possible.
Being a typical customer, they want to keep the costs down but they also
want it to work and operate reliably.
I've had good luck using conventional industrial controls on machines
I have seen electronics on sea buoys. It's mounted in a simple PVC
box, then all wires are connected, then it is filled to the edge with
some silicone gel, after setting, the lid is screwed on. Even all
heatsinks are completely submerged in the gel.
I've worked on explosion proof systems so the idea of using what we
called seal-offs is a good idea to contain the air in the cabinets.
Dave
On 7/16/2011 9:30 PM, James Reed wrote:
You can do the same thing electricians do in an explosion-proof enclosure.
The idea of an explosion proof
I have seen conformal coating but I have no experience applying it. I
would think it could create hot spots on some motherboards if it was not
carefully applied.
Does anyone have any experience in testing for condensation issues?
I have done simple temperature tests on some systems to check
On 7/17/2011 12:48 AM, dave wrote:
On Sun, 2011-07-17 at 01:30 +, James Reed wrote:
You can do the same thing electricians do in an explosion-proof enclosure.
The idea of an explosion proof enclosure is not to prevent the vapors from
entering the enclosure, but to contain any
On 7/17/2011 5:36 AM, Jaap Stolk wrote:
I have seen electronics on sea buoys. It's mounted in a simple PVC
box, then all wires are connected, then it is filled to the edge with
some silicone gel, after setting, the lid is screwed on. Even all
heatsinks are completely submerged in the gel.
2011/7/17 Dave e...@dc9.tzo.com:
When you say gel, do you mean the desiccant gel beads? That is
very interesting..
That can be any mineral oil - they are not conductive. There are many
vids on Youtube, how PCs are put in oil and they keep working. Even
gasoline is non-conductive, so You
On Sunday, July 17, 2011 10:51:23 AM Dave did opine:
On 7/17/2011 5:36 AM, Jaap Stolk wrote:
I have seen electronics on sea buoys. It's mounted in a simple PVC
box, then all wires are connected, then it is filled to the edge with
some silicone gel, after setting, the lid is screwed on.
On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote:
Dave wrote:
I'd like to use as many off the shelf devices as possible - PC boards
etc... if possible.
Being a typical customer, they want to keep the costs down but they also
want it to work and operate reliably.
I've had
On Sun, Jul 17, 2011 at 1:19 PM, Dave e...@dc9.tzo.com wrote:
When you say gel, do you mean the desiccant gel beads?
No, like gene, I meant something like this:
http://fongyong.en.alibaba.com/product/431565542-212336882/RTV_2_electrical_electronic_silicone_potting_casting_compounds_sealant.html
Jaap Stolk wrote:
On Sun, Jul 17, 2011 at 1:19 PM, Dave e...@dc9.tzo.com wrote:
When you say gel, do you mean the desiccant gel beads?
No, like gene, I meant something like this:
Jaap Stolk wrote:
On Sun, Jul 17, 2011 at 1:19 PM, Dave e...@dc9.tzo.com wrote:
When you say gel, do you mean the desiccant gel beads?
No, like gene, I meant something like this:
If you go with a standard PC motherboard, I would get a can of clear lacquer
and apply 2 coats to both sides of the board and components.
I have aging industrial electronics in my shop that get weird in summer when
humidity peaks.
I have successfully eliminated -some- of the weirdness by sealing
On 7/17/2011 9:25 AM, Viesturs Lācis wrote:
2011/7/17 Davee...@dc9.tzo.com:
When you say gel, do you mean the desiccant gel beads? That is
very interesting..
That can be any mineral oil - they are not conductive. There are many
vids on Youtube, how PCs are put in oil and they
On 7/17/2011 7:07 AM, andy pugh wrote:
On 17 July 2011 03:01, andy pughbodge...@gmail.com wrote:
The display is likely to be the problem. You might even want to
consider a CRT, because at least then condensation can't get behind
the glass.
Thinking about this some more, you
On Sunday, July 17, 2011 07:25:15 PM dave did opine:
On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote:
Dave wrote:
I'd like to use as many off the shelf devices as possible - PC
boards etc... if possible.
Being a typical customer, they want to keep the costs down but they
On Sun, Jul 17, 2011 at 11:56 AM, Jaap Stolk jwst...@gmail.com wrote:
it's actually called silicone potting, a google image search turns
up many examples.
Be careful that it's the electrical-compatible---ordinary commercial
silicon RTV compounds release acetic acid and will corrode metals
Hi Guys..
I am considering using EMC2 (or part of it) in a mobile application that
defines the term rugged.
The application itself is pretty simple so I am not worried about the
software. I am worried about the survival of the hardware.
The equipment will be mounted in a box on a piece of
You can do the same thing electricians do in an explosion-proof enclosure. The
idea of an explosion proof enclosure is not to prevent the vapors from entering
the enclosure, but to contain any explosion that could occur inside the
enclosure. ( Kind of re-assuring, isn't it?) When these
On 16 July 2011 23:58, Dave e...@dc9.tzo.com wrote:
Do you guys have any suggestions?
I suspect that a layer of conformal coating on the PC motherboard
after assembly (including attaching connectors) would mean that that
didn't care about condensation.
The display is likely to be the problem.
On Saturday, July 16, 2011 10:03:15 PM Dave did opine:
Hi Guys..
I am considering using EMC2 (or part of it) in a mobile application that
defines the term rugged.
The application itself is pretty simple so I am not worried about the
software. I am worried about the survival of the
Dave, I wouldn't waste my time trying to beef up a consumer-grade
computer. There are many industrial- and military-grade i86 computers
available commercially that you could start from.
The rub is your characterization Being a typical customer, they want to
keep the costs down but they also
On Sun, 2011-07-17 at 01:30 +, James Reed wrote:
You can do the same thing electricians do in an explosion-proof enclosure.
The idea of an explosion proof enclosure is not to prevent the vapors from
entering the enclosure, but to contain any explosion that could occur inside
the
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