gunrunnerjohn posted:I'm confused about the PTC, the regulator has current limiting, the chance that the PTC will be used is pretty small. You'd be better off with a universal design to toss in the 22uh choke for DCS in that spot.
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I missed that 10mm cap, I could have made that board smaller with that one. With the 10mm diameter, it's now 1" x 3/4".
The PTC is there to prevent the wires from melting in the event of a derailment that causes a short between the rollers. I have read that recommended here.