View Single Post
Old 05-25-2009, 10:09 PM   #1418 (permalink)
MPaulHolmes
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,368
Thanked 1,119 Times in 734 Posts
The LEM Hass current transducer (hehe, I love that word) output splits. One path goes to the comparator that triggers the flip flop to change states if there is an overcurrent event, and the other path goes straight into the A/D channel of the microcontroller after an RC filter. That's sort of up in the air right now with the new design, as to what is the best filtering approach. The LEM output on the first controller was really noisy, but this next control board is much better, so we'll see what sort of filtering is best.
__________________
kits and boards
  Reply With Quote