Electronics > Projects, Designs, and Technical Stuff
Low cost DC current transducers - where from?
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DTJ:
I'm looking for a source of DC current transducers - the sort that clip over a wire and have a flying lead back to the measuring circuitry.

Rough specs:

* +/-10 DC Amps max (5A might do the job) with an accuracy of 1% or 2%.
* Preferably something that only needs a single rail supply (5V or 12V?) rather than dual +/- rails
* Split core type to clip over the wire.
* Low cost.
* Quantity - a few initially, maybe 50 or more down the track.
* Edit: Preferably a main stream supplier or company for continuity of supply etc.
Something like the one in the picture attached below.

I can only seem to find ones costing well over Au$100.

Do less expensive units exist? Any pointers?

Thanks!

t1d:
https://www.google.com/search?q=diy+dc+current+sensor+circuit&client=firefox-b-1&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwiEsOWLwb_eAhVFyYMKHddzDjwQsAR6BAgAEAE&biw=1280&bih=667

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1311.R6.TR11.TRC1.A0.H1.Xdc+current+.TRS0&_nkw=dc+current+sensor&_sacat=0
BrianHG:
https://www.aliexpress.com/wholesale?spm=2114.search0104.8.4.4af33b3buGpXz3&initiative_id=QRW_20181106020524&SearchText=hall+transformer&productId=2029088141

Careful with some of the above EBAY devices, some only sense AC, not DC.
BrianHG:
Here is one source: https://www.alibaba.com/product-detail/split-open-loop-hall-current-transducer_60797005311.html

Note, to drive the DC sensing electronics, these guys require a +/-15v DC supply.
Zero999:
The single supply for bipolar current sensing is quite likely the show stopper. Although it's possible, it's certainly not something which is normally implemented.
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