I don't know, I struggle with a light switch, but that doesn't look like board someone took home with a box of parts and a soldering iron to make at home.

Are there services that you can send the BOM and board files too, and not only do you get the PC board back, but it's populated? Will they do that for a onesy-twosy thing like this?

Then all you have to do is supply the battery and download the firmware (however that is done).

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bkettle 8 days ago | parent [-]

Yes, I’ve done it for a batch of 10 with https://jlcpcb.com/smt-assembly for around $10/board including the PCB

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nilamo 8 days ago | parent [-]

>$10 per business card is extremely high, though.

	▲	vFunct 8 days ago \| parent [-]
		Not if you're at a trade show in an industry where a single deal can net millions of dollars, and a small booth might cost $15k just for the space for a few days. There's definitely an entire business available for expensive trade show merchandise, including electronic business cards. People routinely give away shirts and other merchandise that cost far more than $10..