Thought I’d have a look at getting the PixyCam working on the Raptor via SPI. Connected everything up to the 10 pin connector but connected the 3.3V of Raptor to the 5V input/output on the Pixy. I don’t think this by itself isn’t a big problem as, at this point, the Raptor is supplying the Pixy.
However - when you connect the USB to the Pixy this 5V pin is supplied via USB and becomes 5V!!! :-[
Raptor now refuses to play ball and reboots every 30 seconds or so.