Does anyone know the actual power draw on the encoder (ipac 4) and trackball?
Haven't measured the
precise current draw of those two devices, but you'll have no problem powering them with any unpowered USB hub.
- Total current draw will be less than 200 mA, even with the four LEDs in the trackball optical circuits drawing 15-20 mA each.
I've been powering a Mini-Pac, UTrak, TT2 spinner, and a dozen or so low-current-draw button+trackball LEDs using an unpowered USB hub for over a decade.
Scott