However, the battery has an internal resistance, and the LEDs themselves are more than just a semiconductor - there’s blinky circuitry in there. Yes, best practice tells me I need a current limiting resistor on these LEDs. The requisite resistor for the LEDs was a point of contention in the original design of the badge. They’re actually really cheap on AliExpress, they work well with the design, and experience tells me I don’t need a resistor for the LEDs. The LEDs are a bit strange - they’re low-profile, fast flicker red green and blue LEDs. The only electronic elements on this badge are a 1220-sized 3V battery, two 5mm LEDs, and nothing else. The original version of this pin featured an extremely simple circuit. With that said, here’s the easy, cheap, and fast way of doing artistic boards in Eagle. It took 20 hours to do the art for my previous project in KiCad, and I estimate it would have taken two in Eagle.
I don’t recommend this overly-involved process if you can help it.
This is the fast and easy way to do things if you want a KiCad tutorial, check out ’s work, or my overly-involved multiple silkscreen process for KiCad. Secondly, this is Eagle, and I’m going to do the majority of the work with a BMP import. Firstly, I’ll be using a blue solder mask, although the same technique can be applied to green, red, yellow, white, or black soldermask. A few months ago, took a portrait of yours truly, changed the colors to what is available on a normal OSHPark PCB, and turned that into different layers in KiCad. This also gives me an opportunity to demonstrate my workflow for creating artistic boards in Eagle.Įffectively, what I’ll be demonstrating here is the creation of the Benchoff Nickel. I’m not really happy with the first version of this badge, though, and this is an opportunity to improve my design. We could just do another run, and order a few more PCBs from the Gerbers I’ve already designed.
The second run meant ordering a thousand PCBs. But as of right now we’ve already handed out our entire stock, that means we need to build more. We’ll be handing out a few of these blinky badges at upcoming events. This badge was such a rousing success, it’s now official Tindie swag. The badges were a complete success, they introduced soldering to a lot of people, and were loved by all. , the queen bee of Tindie, and I designed, developed, and kitted three hundred Tindie badges in ten days leading up to DEF CON. Last month I had the pleasure of creating a new piece of hardware for Tindie.
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