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Old 04-22-2009, 01:42 PM   #47 (permalink)
consaka
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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?
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