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GS
Guest
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 Posted: Tue Apr 17, 2007 6:13 am Post subject: Can I place prottype board (power on) on top of silver anti- |
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I don't have anti static mat in my cube, if I place prottype board
(by power on) on top of silver anti-static bag and keep working with
that prototype board?. I turned power on, Is it Ok if I keep powered
board on top of anti-static bag, sometimes night times I used to leave
that board on, will be Ok?. Thanks. |
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Noozer
Guest
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| Posted: Tue Apr 17, 2007 6:13 am Post subject: Re: Can I place prottype board (power on) on top of silver a |
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"GS" <globalswamy@hotmail.com> wrote in message
news:1176781680.034143.212530@e65g2000hsc.googlegroups.com...
| Quote: | I don't have anti static mat in my cube, if I place prottype board
(by power on) on top of silver anti-static bag and keep working with
that prototype board?. I turned power on, Is it Ok if I keep powered
board on top of anti-static bag, sometimes night times I used to leave
that board on, will be Ok?. Thanks.
|
Those silver bags are conductive. You would be better off placing it
directly on your desk without the bag. The box the mainboard came in can
also be used, as long as it doesn't have any "foil" stickers or labels. |
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GT
Guest
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| Posted: Tue Apr 17, 2007 2:52 pm Post subject: Re: Can I place prottype board (power on) on top of silver a |
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"Noozer" <dont.spam@me.here> wrote in message
news:Ac%Uh.86115$6m4.17538@pd7urf1no...
| Quote: | Did your motherboard come with a piece of foam sheet (usually pink or
dark grey)? If so, place the motherboard on top of it because it's
anti-static but doesn't conduct electricity so much that anything will
short out.
Don't place your mainboard on anything conductive and power it up.
Are those foam slabs safe? Probably. Do you want to take that small risk
that it might short something out and do damage, or at least skew signals
enough that the board runs flaky?
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If you place it on the foam sheet it might overheat - no airflow under the
board. Best to place it on something known to be non-conductive, but hard
and flat, so there is some air round the board. How about a large book or a
couple of DVD cases (although they might get hot and melt the plastic cover
a bit). If you use a couple of DVD or 4 CD cases, you can leave an airgap in
the middle for good airflow. |
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John A
Guest
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| Posted: Tue Apr 17, 2007 2:52 pm Post subject: Re: Can I place prottype board (power on) on top of silver a |
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"GT" <ContactGT_remove_@hotmail.com> wrote in message
news:46249ea5$0$17266$c3e8da3@news.astraweb.com...
| Quote: | "Noozer" <dont.spam@me.here> wrote in message
news:Ac%Uh.86115$6m4.17538@pd7urf1no...
Did your motherboard come with a piece of foam sheet (usually pink or
dark grey)? If so, place the motherboard on top of it because it's
anti-static but doesn't conduct electricity so much that anything will
short out.
Don't place your mainboard on anything conductive and power it up.
Are those foam slabs safe? Probably. Do you want to take that small risk
that it might short something out and do damage, or at least skew
signals
enough that the board runs flaky?
If you place it on the foam sheet it might overheat - no airflow under the
board. Best to place it on something known to be non-conductive, but hard
and flat, so there is some air round the board. How about a large book or
a
couple of DVD cases (although they might get hot and melt the plastic
cover
a bit). If you use a couple of DVD or 4 CD cases, you can leave an airgap
in
the middle for good airflow.
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Or better still, fit several mainboard mounting pillars/spacers and then
stand it on them. |
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kony
Guest
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| Posted: Thu Apr 19, 2007 1:31 pm Post subject: Re: Can I place prottype board (power on) on top of silver a |
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On 19 Apr 2007 04:09:42 -0700, larry moe 'n curly
<larrymoencurly@my-deja.com> wrote:
| Quote: |
GT wrote:
If you place it on the foam sheet it might overheat - no airflow under the
board. Best to place it on something known to be non-conductive, but hard
and flat, so there is some air round the board. How about a large book or a
couple of DVD cases (although they might get hot and melt the plastic cover
a bit). If you use a couple of DVD or 4 CD cases, you can leave an airgap in
the middle for good airflow.
I wouldn't run the mobo for long with it sitting on the foam sheet
(slab?) because of the possibility of overheating. OTOH your
suggestion of using a book or DVD/CD cases could be a lot worse
because they're made of materials that generate a lot of static
electricity (styrene or polypropylene for CD/DVD cases, vinyl or clear
Mylar for book jackets). I like John A's suggestion to install
standoffs on the motherboard to prop it up from the table.
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I usually set boards on a thick magazine or three layers of
cardboard cut from a box. Well actually I always do it,
since all boards are tested before being built into a
system. Putting them on this elevated material merely
serves the purpose of getting the board off the table by a
few millimeters so the card brackets have room to hang over
the board edge.
In some cases where the heatsink is through-board mounted or
attaches to a frame behind the board, I'll put an addt'l
layer of cardboard under the bottom 2/3rd of the board so it
all sits at about the same height, so plugging or unplugging
things doesn't flex the board as the entire back is
reasonably well supported. Standoffs might work in some
situations, but I would not trust that, as pressure on the
board will make the standoff move relative to the surface of
the (table, etc), allowing the board to flex more than it
would in a case with rigidly mounted standoffs.
I've never had a board overheat like that, do not consider
airflow a factor at all, nor any other problems, but if
there were fets on the back, I agree it would be best not to
put the area in contact with any material with a lowish
melting point as even if they stayed cool enough, the
material may be degraded from the heat. It seems fets on
the back are becoming as rare as they used to be though, you
rarely see boards with that layout, configuration, and with
most now at least 3 stages, the heat density is lower. |
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larry moe 'n curly
Guest
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| Posted: Thu Apr 19, 2007 1:31 pm Post subject: Re: Can I place prottype board (power on) on top of silver a |
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GT wrote:
| Quote: | "Noozer" <dont.spam@me.here> wrote in message
news:Ac%Uh.86115$6m4.17538@pd7urf1no...
Did your motherboard come with a piece of foam sheet (usually pink or
dark grey)? If so, place the motherboard on top of it because it's
anti-static but doesn't conduct electricity so much that anything will
short out.
Don't place your mainboard on anything conductive and power it up.
Are those foam slabs safe? Probably. Do you want to take that small risk
that it might short something out and do damage, or at least skew signals
enough that the board runs flaky?
If you place it on the foam sheet it might overheat - no airflow under the
board. Best to place it on something known to be non-conductive, but hard
and flat, so there is some air round the board. How about a large book or a
couple of DVD cases (although they might get hot and melt the plastic cover
a bit). If you use a couple of DVD or 4 CD cases, you can leave an airgap in
the middle for good airflow.
|
I wouldn't run the mobo for long with it sitting on the foam sheet
(slab?) because of the possibility of overheating. OTOH your
suggestion of using a book or DVD/CD cases could be a lot worse
because they're made of materials that generate a lot of static
electricity (styrene or polypropylene for CD/DVD cases, vinyl or clear
Mylar for book jackets). I like John A's suggestion to install
standoffs on the motherboard to prop it up from the table. |
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paulmd@efn.org
Guest
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| Posted: Fri Apr 20, 2007 7:28 am Post subject: Re: Can I place prottype board (power on) on top of silver a |
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On Apr 16, 8:48 pm, GS <globalsw...@hotmail.com> wrote:
| Quote: | I don't have anti static mat in my cube, if I place prottype board
(by power on) on top of silver anti-static bag and keep working with
that prototype board?. I turned power on, Is it Ok if I keep powered
board on top of anti-static bag, sometimes night times I used to leave
that board on, will be Ok?. Thanks.
|
No. They conduct electricity. 'Nuff said. |
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