View Single Post
Old 04-22-2009, 02:42 PM   #47 (permalink)
consaka
EcoModding Lurker
 
Join Date: Mar 2009
Location: Vancouver, WA
Posts: 48

Active Learning - '93 Chevy Suburban Silverado
90 day: 10.67 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by dcb View Post
Here is a more basic type:
How to measure current and power -* using a hall effect transducer - clamp

It's gonna take some homework

If you are thinking a plugin solution then perhaps a separate voltage reg. So roughly speaking we are trying to turn anything above, say .5 amps into >2.5 volts. With maybe 5 amps current capability. Might be a hall effect and a mosfet. Dang, clamp on would be nice worth doing some homework for that.
I have one of those hall effect transducers but the documentation says 20 mA max supply current. I am not sure how to limit that off of a car battery supply.. I dont want to burn this thing out. How can I limit the current to 15-20 mA?
  Reply With Quote