View Single Post
  #9   Spotlight this post!  
Unread 12-12-2013, 17:12
RyanCahoon's Avatar
RyanCahoon RyanCahoon is offline
Disassembling my prior presumptions
FRC #0766 (M-A Bears)
Team Role: Engineer
 
Join Date: Dec 2007
Rookie Year: 2007
Location: Mountain View
Posts: 689
RyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond reputeRyanCahoon has a reputation beyond repute
Re: MicroControllers at competitions

Quote:
Originally Posted by Ether View Post
Depends on how you do it I would think. What rule did you have in mind?
Thanks for catching my error (again ). I've edited my original post. Contrary to the wording of my original post, I was only thinking of the general "custom circuits can't affect power pathways" rule and forgot the exception for low-impedance current monitoring. Presumably (0.075 volts) / (200 amperes) = 0.000375 ohms is low impedance...

Quote:
Originally Posted by Ether View Post
Yours is 200 amps at 0.075 volts (shunt)
Al's is 125 amps at 12 volts (load resistor)
Oh that makes sense. I was reading the 12V as a safety rating or something along those lines.

Quote:
Originally Posted by magnets View Post
Your multimeter (should) have a fuse to protect itself from current, so you should be all set.
Well it would be good to check the rating on the multimeter first. Not worth blowing unnecessary fuses. Also make sure that the probe leads are large enough to handle the current as well.
__________________
FRC 2046, 2007-2008, Student member
FRC 1708, 2009-2012, College mentor; 2013-2014, Mentor
FRC 766, 2015-, Mentor

Last edited by RyanCahoon : 12-12-2013 at 17:21.