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:

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

building /automod (channel bots), /glass (no code frames) • uncurated.xyz
• prev @manifoldxyz, twilio

It looked fully integrated too. Like a first party product. So smart.

dude 100% agree, i remember noticing they were in the headphone jack years ago but no idea how they pulled that off

Holistic views of tech. Helping teams manage complexity and build more effective software – /framedltime – /sauce – /cto - thinker at /compasslabs

ya some nostalgia.

I like the hack through audio jack cause I don’t immediately associate it with something that transmits data in the same way a usb device does.

Kinda analog.

100% under appreciated 

I sometimes miss the audio jack.

In practical terms, usb-c is superior.

Maybe nostalgia plays a role

This is one of those products that felt like magic

Plug it in, open the app, swipe a card

Incredible innovation

The Square PoS machine is also insane simple UX I came across street vendor using it in London 

The guy pressed less than 3 buttons!