* - Paranoid Studio's US2AX (V1, V2 and V3 hardware revisions)
* - PJRC Teensy (1.x and 2.x versions)
* - Sparkfun U2 Breakout Board
* - Paranoid Studio's US2AX (V1, V2 and V3 hardware revisions)
* - PJRC Teensy (1.x and 2.x versions)
* - Sparkfun U2 Breakout Board