In theory, you should be able to take a very ordinary split core (the "clamp"
part) transformer, such as this:
http://www.onsetcomp.com/d-image/large/75-AMP-Mini-Split-core-AC-Current-Transformer_T-MAG-0400-75.jpg
which generates a small AC voltage proportional to the current, and put a diode
on it to turn it to DC, and hook it up to a, say, DS2438 which can measure
voltages or current.
BUT the trick is sizing the split-core transformer to produce the right voltage
range for the chip, which measures... uh... up to 15 volts? I think?
I notice there's a complete kit here:
http://www.hw-group.com/products/sensors/30A-Current-probe-1W-UNI_en.html
But I suspect it's stupid expensive.
Also with the DS2438 you should be able to get it to "log" the amps that have
passed through since it was last powered up which could be convenient.
On 2014-02-08, at 11:24 , Daniel MacKay <[email protected]> wrote:
> Hello all!
>
> Does anyone have an inexpensive (say, under $50 type of thing) 1-Wire AC amp
> (clamp type, obviously) sensor solution?
>
> I need to measure common household amps - so up to, say 30A would be fine,
> say, with 0.5A accuracy (or so.)
>
> Any thoughts would be welcome.
>
> -dan
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