Beeper

[robthomson]

Consider adding an optional 'beeper' to the head tracker. This could work as an in dicator / beep to tell you device has powered up, and also as a'center button' pressed.

[dlktdr]

The new custom DTQsys Headtracker board has an on board buzzer now, available soon. We just have to add the modes. Should be pretty easy to add a fixed pin to the nano too, although will need a transistor to drive it.

I think for one, it should use the on-board battery monitor to beep when battery is low. Assume LiPo chemistry unless user picks otherwise in the GUI?
The beep when a button is pressed (Center for instance) for user feedback sounds like a great idea +1
Beep modes on various error situations. (Can't talk to a sensor, Sensor Values out of acceptable range, etc)