Published September 14, 2020
Hello! This is Andy. I've made some progress on my EMG circuit since last year, and by that I mean I've iterated exactly once. While assembling my second iteration, I decided to bite the bullet and order a PCB stencil so I would have an easier time putting together the board. It was really quite fun, so I've decided to share the process and my thoughts on it.
You need to have - your blank, unpopulated PCB
the PCB's stencil
a credit card or something similar
other blank, unpopulated PCBs to support the stencil
reflow oven or hot-air gun
The hardest part is the actual spudging — make sure to apply a lot of pressure, but resist the urge to get solid grey filled in on the pads. Don't go over it more than a few times. You'll have a solid uniform grey coating on all the footprints, but they'll leak out the sides and ruin the pads. That's all for now, be safe!