PCB business cards

A few months ago, I had the idea of making a PCB business card. At the time I was working on Super Street Fire, and developing a wireless solenoid controller for triggering flame effects. (More on this soon.) I took the same basic idea, removed everything unnecessary (including the microcontroller), and set aside an area for contact info. With the remaining space, I found I could fit three optoisolator/MOSFET circuits comfortably.

The end result is this, a three channel wireless solenoid controller:

I’ve put up a project page for my business card with more details on the hardware, the KiCad design files, and some example programs to run it.

My hope was to make a memorable card, but also one that’s useful (at least, for other people who create fire art), and one that can be assembled as a project by someone without a lot of electronics experience. I hope that at some point I’ll find someone else’s project using my card as a controller.

I know I’m not the only person who has ever made a PCB business card. However, I’d like to think that mine is particularly awesome; not everyone can say that their business card is a wireless flamethrower controller, and use it to make things that they probably shouldn’t bring across international borders:

“If this were a bomb, would I really have my name, phone number, email address, and website printed on it in a prominent location?”

I hope I don’t ever have to have this conversation.