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Shining a light behind this metal credit card.
(thelemmy.club)
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this post was submitted on 15 May 2026
184 points (98.9% liked)
Mildly Interesting
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Any reason it's a staircase instead of just a simple. Straight line?
I believe that minimizes capacitance. My question is why diagonal at all. Maybe it helps with adhesion during the manufacturing process?
Capacitance between turns, specifically. Provides e-field shielding too.
~~It's an antenna & it needs to be a certain length - making it a bit gay just adds enough pizazz (length) and it's the ez thing to do from a designers pov.~~
Oh, no, the metal ones do in fact use the metal as an antenna?? Can't really tell (but I would guess not).
yt/wyj7r_C51UU&t=115, yt/P5aszRLpa3Y
I though it was like this:
So the pattern of the cut is maybe structural (harder to bend with the plastic inside it bcs it's longer?) or just perhaps a CNC simplification.