1" cubes

I used to use 35 mm film cans.

Cheers,

Phil Hobbs

Tin plated steel sheet. 0.2mm and 0.3mm thick, (RS Components about £17 for a big pack). Cuts with scissors. Can be folded up with pliers and fingers and is magic to solder up the edges. The stuff is dead easy to punch, say

Same here. But who uses film now-a-days?

...Jim Thompson

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There are some available from eBay:

But I like the steel sheet idea. If you buy thicker sheets, it would be even more stable and you can saw it for simple forms like a cube:

Now-a-days I prefer plastic "project boxes"... much more professional looking.

...Jim Thompson

Fit the circuitry onto a 1.5" square bit of perfboard, heat-shrink with a bit of 2" heatshrink tubing in the X orientation, then another in the Y orientation... this makes a square pillow-shape, with the wires coming out at the corners.

Fit the circuitry onto a 1.5" square bit of perfboard, heat-shrink with a bit of 2" heatshrink tubing in the X orientation, then another in the Y orientation... this makes a square pillow-shape, with the wires coming out at the corners.

Yep - and fill it with hot glue or RTV if more cable or component strain relief is needed.

john jard>Tin plated steel sheet. 0.2mm and 0.3mm thick,

Man, did Google screw up your pounds sterling character on the Posting page. 8-( Again, the left hand not knowing what the right hand is doing.

...and you can a version for free several times a week

--by just not tossing it in the trash can.

As for film cans, I remember re-using the little tubes that the Poloroid schmear came in. ...but (as with JT's plastic boxes notion) no shielding. 8-(

Can't beat a bit of steel for screening those wild waves :)

If you don't need shielding you can pick up some ice cube trays at a dollar store and cut them apart.

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Came through fine here (in Oz) - maybe the problem is at your end? Tony

I like that idea, pot them wth epoxy - and also the tin plate method, which I've played with before but never really got into. Thanks everyone

To the person that asked, it doesnt much matter what the material is, it just needs to contain a little circuitry.

I tend to shy away from potting generally, as its non repairable, but it sounds like a good idea really. I suppose one could even put sand in the epoxy to extend it, but hardly worthwhile at =A31 per 40ml.

Where the contents are small enough I might just try potting with a 1" plastic ball - the result would be easier to drag around behind furniture.

cheers everyone.

You might want to coat the board with a layer of RTV (the kind that doesn't use acetic acid) before the epoxy. The RTV is compliant enough to relieve the stress caused by curing and thermal expansion of the epoxy.

Cheers,

Phil Hobbs

This sounds expensive. At eBay you can buy it at £1 per 130ml:

And looks like using some silica sand as an extender is stable up to a ratio of 4 parts sand and 1 part epoxy:

The average density of epoxy is 1.5g/cm^3. This means you'll need about 25g of epoxy for a 1" cube. If you use 4 parts sand as an extender, you'll need

"john jardine" wrote in news:csFtk.65662$c47.30500 @en-nntp-06.am2.easynews.com:

Sorry if this is a dummy question (I'm still larning the basics), but your post got me curious - Can one can either use copper sheet which is cut out and then stuck to teh sheet, or even use copper strip that has an adhesive blacking designed to be stuck onto glass? Or is there a special type of adhesive that'd need to be used?

TIA -

- Kris

This question is not clear. One can use copper sheet instead of tin-plated steel, in fact it's even easier to work with than timplate. But, "stuck to [the] sheet"? What sheet?

And the next one:

Do you mean backing? Where did the glass come from?

Again, this question isn't clear. You could use a plastic box and cover it with self-adhesive copper for EMI shielding, but this seems to not answer your question either?

Can you give us a clearer picture of what you're actually trying to accomplish?

Thanks, Rich

Rich Grise wrote in news: snipped-for-privacy@example.net:

After reading the OP's article, I was just curious as to whether a simplified/cheaper alternative to a manufactured PCB could be made using self-adhesive copper foil and as to whether other materials could be used as the substrate, such as glass. I guess that *is* more of a "basics" question, but the original post was here, so I just replied/asked directly. That being said, I did do some searches after re-reading the original post and replies, and thinking some more about it (to figure out which search terms would likely be useful) and found a good bit of info that actually answered what I was wondering about.

Thank you, tho', for trying to answer :)

- Kris

Glad you found your answer! :-)

Cheers! Rich

Type "enclosure" into the search box:

Expensive, but very nice.

-- Joe