View Single Post
  #29   Spotlight this post!  
Unread 13-12-2013, 22:08
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
Posts: 10,798
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: MicroControllers at competitions

Dev,
To put this in perspective, 0.025 ohms is equivalent to 25 feet of #10 wire or 12 feet of #12. It is also twice the internal resistance of the battery. That steals a lot from the motor(s) you are monitoring. So once you are drawing enough current to drop 4 volts at the resistor you will be dropping 2 volts across the internal resistance of the battery. At 5.5 volts, the regulator in the DSC gives out and stops producing PWM to the speed controllers.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.