![]() If you use a maginfiying glass, you can also see the miniscule gold bond wires. 'Basic level' cards that I already have: Discover More, BoA Cash Rewards, CapOne Venture, Chase Freedom. ![]() I cant figure out if AMEX is chip and pin (CS is clueless when I reached out) and isn't as widely accepted as VISA or MC. Speaking of Amex, the everyday line is made of clear plastic, so you can see the back of the die, as well as the contact bonding points. 'Higher end' cards that I currently have as AU: AMEX Platinum and CapOne Venture X. Plus, earn 3x miles on United purchases and 2x miles on all other travel. Amex seems to have embedded a 6 pin contact into a larger structure for the platinum, possibly to avoid issues with the contacts touching the metal card, or simply as a design choice. Enjoy a 125 annual United purchase credit, two 5,000-mile anniversary award credits and other premium travel benefits. If you have a Chase credit card that recently expired, it’s likely. All of their co-branded credit cards do, too. All newly-issued Chase credit cards and debit cards have allowed contactless payments since January 2019. Some intersting things to note, both saphires used 8 pin contacts, but they are from different manufacturers, and the CSR looks more angular. You can get a Chase contactless card by applying for any Chase credit or debit card. The notable exception is some cards that support USB, and can use a simple passive adapter instaed of a real reader (this is not typically not used for payment cards) The bottom two pins are reserved for per-vendor functions, and are usually either not connected internally, or are connected, but have no function. However the standards only define a minimum area for the contacts and their seperation, so vendors sometimes use that leeway to incoperate logos or other art into the contacts (HID does this, and ZietControls used to.) The top six pins handle almost everything the card will ever do, Two of them are power, two are data, and the remaining two are reset (think reboot) and programming power (mostly not used now, older technologies needed higher voltage to write). The contacts, and their position are standardised by ISO 7810-1.
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