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Unread 23-04-2010, 07:36
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
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Rookie Year: 1996
Location: Wheeling, IL
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Re: 2010 Lesson Learned: The Negative

Quote:
Originally Posted by Tyler Hicks View Post
Did anybody else have zero volts reading on the classmate before the match, but when the match started, the robot worked just fine?
Tyler,
Are you talking about the robot 12 volt display on the Classmate or the voltage on the Classmate battery?

The 12 volts from Module 1 is used by the Crio to determine if the robot battery level is getting too low. The Crio power supply on the PD drops out at 4.5 volts. So knowing this fact, the designers added a safety margin of 1 volt to the Crio firmware. The Crio disables all output when the battery falls to 5.5 volts. Without the voltage monitor, it is possible for odd behavior from your robot during these low battery conditions.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.
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