Thread: Classmate Static Discharge Susceptibility
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Unread 08-03-2010, 13:01
charrisTTI charrisTTI is offline
Ramblin' Wreck
AKA: Charles Harris
FRC #0623
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Join Date: Jan 2005
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Re: Classmate Static Discharge Susceptibility
Quote:
Originally Posted by Mark McLeod View Post
Similar symptoms I saw this weekend were tracable to under-powered USB devices. All Comms are good, but the robot doesn't respond to the driver controls.

These are the USB mistakes I saw teams making:
  • If you are using the PSOC it is usually the biggest power-hog. That must be plugged directly into the Classmate.
  • The USB hub should be plugged into the other Classmate USB connector and the joysticks into that.
  • If you have a real power-hungry game controller - lights/vibrate/etc. - that needs to be plugged directly into the Classmate too. So you may have to choose between the PSOC and any fancy game controller.
  • The Stop switch they gave us in the KOP is NOT used at competition. Unplug the power drain to run those color changing LEDs.
The National Instruments rep at DC said to be sure to plug the RED power only USB cable into one of the classmate ports and the BLACK USB cable into the remaining port. We then had one KOP joystick, one Logitech Extreme 3D Pro, and the Cypress module plugged into the hub. Stop button stayed in the pit area. Still saw problems with this configuration.
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