jtgi
@jtgi
ingenuity of original square card reader underrated imo. the reader tunneled the card number through the mic input. It's recovered in software by analyzing the waveform. It was brilliant engineering, a major unlock for commerce and packaged beautifully. hardware breakdown: https://tinyurl.com/jdm8ct2a
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Chris
@c-pross
It helped me make so much 💵 throwing house parties!
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