4 ms·
You don't need an expensive wallet, strip of aluminium foil works as great. NFC uses magnetic antennas/coupling meaning that shielding from one side is enough
by Kubuxu 10y ago
You don't need an expensive wallet, strip of aluminium foil works as great.
NFC uses magnetic antennas/coupling meaning that shielding from one side is enough to block signal.
My solution is to laminate strip of aluminium foil in card form factor.
- kalleboo 10y agoMore on this from Dave Jones at the EEVBlog where he actually tests the attenuation and visualises on an oscilloscope: https://www.youtube.com/watch?v=kp63MZ6RudE https://www.youtube.com/watch?v=kp63MZ6RudE As well as testing an active jammer that's for sale https://www.youtube.com/watch?v=rnOuEFR6qoM https://www.youtube.com/watch?v=rnOuEFR6qoM