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Unread 11-01-2009, 13:55
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
Location: Wheeling, IL
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Re: Current Measurement

Brennan,
The chip to which you refer was not available at the time. The chip called for is easily scaled by one external resisitor to produce a usuable range for the input current we expected. Please note that this is a multichannel device intended to look at up to eight different current sense inputs and channel them for our use to the OI. We also developed this for a handheld unit which we then used to help teams troubleshoot problems. One of the first was the ThunderChickens which were using a multimotor transmission that year. It pointed out a dead motor in that system after team mentors had been scratching their heads for a while.
For anyone trying to develop another method, please remember that there does not exist a bipolar power supply on the robot to which standard analog options can be connected.
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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.