hi abc,
That is the usual way to connect.
I would suggest you drive them directly with +5V, rather than the HX711 series transistor driver.
E
Process them independently ? You basically Wiring up each load cell to a separate HX711 ? That way are we not limiting the capacity ? Each cell is rated up 100KG, so total weight will always between 0-100KG ? where as in Parallel we could get upto 4 x 100KG = 400KGI've never understood the proclivity to wire load cells in parallel, especially in regard to the complexity and time/labor involved to trim each load cell such that the combination produces an acceptable result.
My preference is to sample each load cell independently -- either using separate hi-quality ΣΔ ADCs, or one ΣΔ with multiplexed bipolar inputs -- and process the calibration of each load cell independently. The algorithm to do this is utter simplicity, simply requiring a few different weight inputs (or weight locations) and solving a trivial matrix.
This is much faster and cheaper, and each cell adjustment does not affect the other cells.
Ok so don't power the cells via S85550 rather power them directly via the 5V supply voltage ?hi,
On theHX711 diagram is a S85550 transistor, which is connected to the analog control on the PCB.
Refer this PDF.
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Sorry, I missed the "HX711" part of your post. I don't know this module, and I was speaking in general terms (in the spirit of which I assumed your post was speaking).You basically Wiring up each load cell to a separate HX711 ?
Eric, do you have a link to the thread?hi joey,
Here on AAC we used that method a little while ago, the TS used 6 off, bridges and 6 off, HX711, connected to a Arduino,.
If this TS wants to go that way, its an option.
E
1/2 bridge? Looks like full bridge to me. What am I missing?The TS had 6 off, 'half bridges' [ same type as todays TS]
hi abc,
Look thru the link in post#12.
It appears that you have a 'full bridge' ie: 4 wires on each cell.
Post a link to where you bought them, so that we can check.
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1/2 bridge? Looks like full bridge to me. What am I missing?
Edit: I see your post just before mine.
hi abc,
If you want to parallel the 4 modules, connect all the wires of the same colour together as per your post #15 diagram.
E