Added 2017-2018 mars rover repository.

OSU Robotics Club/Mars Rover 2017-2018/electrical/documents/nodes/arm_breakout_1.md

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+# Arm Breakout 1
+
+Pictures here.
+
+Designed by [Dylan Thrush](www.dylanthrush.com).
+
+## Summary
+
+Made for MR1718 as part of the OSU Robotics Club.
+
+Breaks out the required pins for three IONI motor controllers. Has a USB to UART chip for setting of parameters.
+
+### Bill of Materials
+
+[BOM](https://docs.google.com/spreadsheets/d/1gDx0AlCHqHsaTh7cWj4YosPhcUce1aw0WUB4wSzndNo/edit?usp=sharing)
+
+#### Design files
+
+[Circuitmaker](https://workspace.circuitmaker.com/Projects/Details/Dylan-Thrush-2/MR1718-Arm-1)
+
+### Downloads
+Schematic placeholder.
+
+Step placeholder.
+
+### Known Issues
+
+#### Version 1
+- Footprint for USB connector is mirrored about the vertical axis, creates 5V -> GND short.
+- LEDs don't seem to work
+- Probably need to add a beefy capacitor to the power rail