The supremely portable dimensions of the humble credit card have been a persistent miniaturization goal for tech device makers for a very long time. Earlier this week krauseler on GitHub shared details of “a fully working computer that is literally the size of a credit card,” dubbed the Muxcard. This ISO/IEC 7810 ID‑1 credit card-sized computer includes an ESP32-C3 microcontroller, an ePaper display, NFC, sensors, and a battery. (Image credit: krauseler on GitHub ) I remember buying a credit card-sized calculator in the previous century, and the iconic and now almost omnipresent Raspberry Pi began as a credit card-sized barebones computer dream – made real . However, those gizmos kind of ignored the important third dimension of a credit card, which makes it so portable, the thickness. This isn’t a mistake repeated by krauseler. Well, almost. The maker admits the Muxcard prototype is 1mm thick as it now stands.…