Don't connect them to the OI through the joystick ports. If it doesn't connect to a joystick port, it's not covered by the no-external-power rule (e.g. laptops attached to the dashboard port have batteries).
Quote:
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Originally Posted by <R83>
All equipment connected to the joystick ports of the Operator Interface must be powered solely through the power available through the port. External power sources of any type are not permitted on any equipment connected to the joystick ports. Portable computing devices can not be connected to joystick input ports on the Operator Interface. Powerpassive devices (e.g. joysticks that draw their power solely through the Operator Interface joystick port) are permitted. The one exception to this rule is Innovation First Incorporated USB adapters (IFI Part Number USB-CHICKLET) may be used to connect USB devices to the joystick ports of the Operator Interface. If used, this USB adapter must be powered with a 7.2V battery similar to the back-up battery. Teams can not use power from the competition port or any other source to power the USB adapter. The USB adapter must be positioned within the OPERATOR CONSOLE so that the indicator lights may be seen during inspection and operation in a match.
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And it should go without saying that you don't want to install large green lights in places where robots can see them.