App note: Disposable metal boxes make excellent shielded enclosures

Believe it or not, Maxim dedicated a whole app note to describing the benefits of using disposable metal boxes as EMI shielded enclosures for your projects. Small steel tins some candy manufacturers use provide both electrical and magnetic shielding:

One way to break this wasteful cycle is use the small steel tins in which candies are sold. These boxes, usually about 4″ wide, 2.5″ deep and 0.5″ tall, can easily contain many of the test fixtures. The lids are hinged, allowing easy access to the internal circuits while protecting the same circuits during storage. The steel construction provides both electrical and magnetic shielding.

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  1. Matseng – I have plenty of those small tin that can fit 5cmx5cm boards no problems. But im having hard time finding the larger ones that are able to fit a 18650 cell. Will try looking around in Guardian/Watsons. Thanks for the heads up.

    1. The “Curiously strong mints” tin from Marks&Spencers is 94 by 64mm and 22mm (outer sizes) height it should accommodate a 18650 that is only 18.6 mm in diameter

    1. Did not think of that. I should check the local fancy coffee/tea/chocolate place, they probably have something useful. Thanks for the tip!

  2. I just picked up a couple of real Altoids tins at a pharmacy in Phnom Penh, Cambodia. USD 2.45 each – I think that’s more or less the same price you’d pay in USA.

  3. LOL! I wrote that note many years ago when I worked for Maxim. I just now stumbled across Dangerous Prototypes, this is an awesome site. Anyway, glad to see that y’all are resurrecting older appnotes which still have merit. i recently Googled for “high Q notch filter” and got an app note from 1969, and it worked wonderfully for me. Keep up the good work.

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