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Thread: How to mount circuit in metal case?

  1. #1
    FLAC
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    How to mount circuit in metal case?

    I have built myself a regulator circuit that I want to mount alongside my PC m/b in a custom metal box that I bought. The problem is that there is basically no mounting holes on the circuit board, and even if there were, I can't have screws poking through the bottom of the metal case (I'll be using rivets to hold the m/b mounting plate and the spacers for the m/b screw into that).

    Does anyone know of a cheap and simple approach to mounting this in my case? Can I get some kind of thick double-sided rubber tape to both hold the circuit in place and prevent is shorting against the metal case?

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  2. #2
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    looks like you have holes in the board....

    I would mount it to a piece of plastic with MB standoffs and double sided tape the plastic part to the case.
    TruckinMP3
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  3. #3
    Newbie Deviser's Avatar
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    Arathranar,

    You could use a hot glue gun and inject the glue between the board and metal case I have done it before many times it works great and costs pennies if that .

    Deviser
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  4. #4
    Variable Bitrate therussman2002's Avatar
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    i have the same problem with my mobo/reg board/etc in a metal case.. i was thinking of getting a small pack of 1/4" long nylon spacers from menards, with small bolts/nuts, but they dont come in packs, just individual packages, and i couldnt find a number i needed...

    so im awaiting an answer to this quandry as well

  5. #5
    FLAC
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    Quote Originally Posted by TruckinMP3
    looks like you have holes in the board....

    I would mount it to a piece of plastic with MB standoffs and double sided tape the plastic part to the case.
    There are two small holes. They're way too small for standard m/b standoffs and I'm not sure I'm comfortable with only mounting at 2 out of 4 corners. And the holes are tiny and very close to the edges of the board - they just don't look like they'd be very effective if I hit a bump or such.

    Currently the hot glue approach is tempting. Hot glue it to some fairly thin plastic and then I can use rivets to hold the plastic in place.
    Progress: 80% - Permanent install left.
    Motion LS800 Tablet PC and dock.
    Vista, Bu-535 GPS, RoadRunner, MPT2006.

  6. #6
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    you could hot glue custom standoffs... that would let a bit of air movement behind the board.
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

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  7. #7
    FLAC
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    That's true. And I'm a little leary of permanently gluing my circuit into the case in case I ever want to remove it and tinker . But that then leaves me with only two tiny holes to mount it with and/or having to drill another two holes in the other corners. Scary stuff... I can just see my carefully built and test circuit (ok, we'll ignore the mark 1 that I blew up by connecting the power in reverse...) dying because I slip with the drill!
    Progress: 80% - Permanent install left.
    Motion LS800 Tablet PC and dock.
    Vista, Bu-535 GPS, RoadRunner, MPT2006.

  8. #8
    FLAC
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    Maybe I'll just hot glue a couple of pieces of wood in place across the entire ends of the circuit board. Then I'll have full support at all 4 corners but could use two small screws to hold it in place.
    Progress: 80% - Permanent install left.
    Motion LS800 Tablet PC and dock.
    Vista, Bu-535 GPS, RoadRunner, MPT2006.

  9. #9
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    That sounds like a good solution.
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

    Read the FAQ!

  10. #10
    Newbie
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    Best is to get some M4 nuts, countersunk head bolts, and washers. find space on the board where you can mount three or four of them, near the corners preferably. Drill holes in the board (don't be a sissy, just be carefull). Hold the board against the box and mark off the positions of the holes. Drill out the box, then countersink the other side. Fit the bolts thru, then screw them on with a nut and washer to the case. Next, fit on another two nuts locked together on all the bolts, so as to give a good standoff height. Finaly, slide on the curcuit and bolt it down with a final nut and washer. This is a bombproof way of doing it, but it's simple and cheap. Use a smaller guage of bolt if M4 is too big (I can't remember off the top of my head).

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