2019-08-08 (Th) DEFCON Business Card Soldering

I am getting ready for DEFCON 27, and I hope to meet a lot of folks, and that means handing out cards. All my cards are hand-soldered, so I don't like to do this often. All the cards arrived from China with plenty of time, but I waited until I was in the spirit of the con to get working.
Preparing for marathon card making

While I thought all the cards arrived in perfect order, I realized that I was sent 1.6mm thick PCBs and not the usual 0.6mm cards I prefer. The thick ones are harder to carry due to bulk, although they are definitely circuit boards with a familiar heft.
A night's work

Some of the cards I distribute rely on thin PCBs which are flexible enough to hold a coin cell battery, but the thickness makes them too rigid to be useful. These boards are not going to be soldered and may have to be discarded. They can still use the header pin sockets to connect with a battery or power supply.
Unusable PCBs

First time here?

Completed projects from year 1
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Completed projects from year 6

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