3 ms·
I'm not a physicist, but doesn't the conductor need to fully encircle the card to make a Faraday cage? I would think that something U-shaped (in one dimension o
by Nogwater 17y ago
I'm not a physicist, but doesn't the conductor need to fully encircle the card to make a Faraday cage? I would think that something U-shaped (in one dimension or another) like a typical wallet would just act as a waveguide. Even if it does act as a waveguide, it might make it safe enough. There might be a way to put some sort of flap that closes over the card.
- wjy 17y agoThere's also one other important requirement: it must be GROUNDED. So unless you're willing to wear a wire from your wallet down to the bottom of your shoe, this won't be too effective.
- wglb 17y agoNo, so long as it is electrically completely enclosed, signals won't get in or out. Doesn't matter if it is floating at +/- 13.89 v ac/dc above ground.