PIDFlight Lap Timer case with XT30 & Regulator

Here's my own case for [PIDFlight's lap timer](https://www.pidflight.com/pidflight-lap/).

It's made to fit **a protoboard cut down to a little less than 55x85mm** - refer to the pictures above to see how I arranged components on mine. _I've used an Arduino Pro Mini instead of a Nano because that's what I had available at the moment, but the same disposition will fit a Nano in the same spot without any problem._

The case has holes for a female SMA connector as well: you may or may not want to attach an antenna, I'm currently doing fine without one and I don't think that increased sensibility would help in this specific use case; lower accuracy would effectively mean more precise lap times.

The voltage regulator that I used came with another piece of kit that I had lying around, but it seems to be [this one](http://www.goodluckbuy.com/dc-dc-power-module-regulator-5v-output-voltage-buck-module-converter-dm02-5.html).

---

[OnShape source here](https://cad.onshape.com/documen