View Single Post
  #1   Spotlight this post!  
Unread 08-03-2010, 13:07
Bharat Nain's Avatar
Bharat Nain Bharat Nain is offline
Registered User
no team
Team Role: Alumni
 
Join Date: Jan 2004
Rookie Year: 2003
Location: New York
Posts: 2,000
Bharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond reputeBharat Nain has a reputation beyond repute
Send a message via AIM to Bharat Nain Send a message via MSN to Bharat Nain
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.
That is interesting because I saw a couple teams with that configuration at NJ who had problems. Instead, I suggested that they plug bot the USB hub connectors into the classmate and power the PSOC via the hub. That seemed to work.

On a side note, I am so glad we did not have to use the PSOC this year.
__________________
-= Bharat Nain =-

Whatever you do, you need courage. Whatever course you decide upon, there is always someone to tell you that you are wrong. There are always difficulties arising that tempt you to believe your critics are right. To map out a course of action and follow it to an end requires some of the same courage that a soldier needs. Peace has its victories, but it takes brave men and women to win them. - Ralph Waldo Emerson
Reply With Quote