I designed the Telemetry Module for the Carnegie Mellon Racing (CMR) Formula SAE racecar this year with my roommate Advaith Sethuraman. This module connects with the other modules over a CAN bus, and sends telemetry over an XBEE radio. More information on our car can be found on the Carnegie Mellon Racing website.
It’s based on an Atmel AVR32UC3 MCU, and I designed it in Altium Designer. It’s a 4 layer board, with JTAG, dual power supplies, filtering, and an XBEE in addition to the AVR.