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▲ zzgo a day ago

Like the CYD[1], or do you really mean a credit card in all three dimensions?

1: https://esp32s.com/wiki/cyd-28-esp32/

▲jasomill a day ago | parent | next [-]

A credit-card sized system seems like it would require a very small screen, a very small battery, or both.

With that said, add NFC, maybe a USB-A connector made accessible by part of the card folding back, and some UI mechanism to select TKIP codes, and a device like that could make an nice universal hardware security token.

▲amelius a day ago | parent | prev [-]

https://news.ycombinator.com/item?id=50406512