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Unread 11-02-2009, 08:06
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
 
Join Date: Jun 2001
Rookie Year: 1996
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Re: Resistor for current measurement

Alan has pointed out the serious nature of power in your attempt to get valid current data. The Jaguar uses a 0.0005 ohm/2watt resistor. AT CIM stall current of 129 amps, that is almost 8.5 watts. One foot of #10 wire on the other hand is 0.001 ohms, will drop 0.1 volt at 100 amps and can easily dissipate the resultant heat.
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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.