<p>I'm sorry I think it's actually C5. On the first version, at least, the polarity markings screenprinted on the PCB were backwards. And I think it slipped through on the next version as well but, to be truthful, I am not sure.</p>
<p>I'm really sort of just waiting for the right case inspiration to strike me. Just haven't found the right size thing yet. Not that I've been looking that hard. The biggest problem with casing is that the maker doesn't suggest using flying wires because of interference issues. I assume enough wires and the thing turns into an FM radio. I keep the thing in a large ziplock bag when I travel just so it doesn't get dirty or wet. Plywood might work okay... but it's a shame because it's a beautiful board. There just isn't a lot of clearance to play with so it'd have to be thin plywood. And then there's the spot for the battery that is sort of awkwardly on front... that might be something you could get away with running wires to, or if you have a good 9V DC adapter maybe just do way with using a battery altogether. I wish more people would post their casing projects. I wonder how many Drone Labs are out there by this point? And why isn't there more discussion going on here?
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