Operating and Output Voltage of Loadcell
Hi there,
does anyone know the actual operating voltage of the load cell, supplied on the Loveboard?
Further more the output voltage range of the load cell is interesting or better the correct amount of trigger force on the load cell of MK4/XL/CoreOne, etc.
I plan to convert the analog output via voltage comparator to a digital on/off signal, trying to use the load cell on boards like the Mini+ board.
Thanks in advance to the community.
RE: Operating and Output Voltage of Loadcell
I don't know if this will help you, but this is what I found after scratching around.
This is what came up when I asked Chat GPT:
The component in your photo is not an ‘IC’ or sensor chip, but rather a
➡️ foil-etched strain gauge (SG), 4-grid full bridge – exactly the type of component that is attached to a metal spring in a load cell / force or bending sensor.
Why is it almost certainly a 4-grid strain gauge?You can see four identical measuring grids (2 at the top, 2 at the bottom), typical for a full bridge for bending or force measurement. Such ‘four grid full-bridge strain gauges’ are offered exactly as shown. tst-scale.com+2tst-scale.com+2The fine, parallel conductor tracks on brown carrier foil are the classic design of a metal foil strain gauge.Four solder pads in the middle = 4 connecting wires of a Wheatstone full bridge (E+, E-, S+, S-).Meaning of the markings ‘T0’ and ‘W’
For many Asian strain gauge manufacturers (BF/BA/BM/BY, ZF, ZYM series, etc.), the printed letters/codes have a standardised meaning:
In catalogues from Zemic, Materontek & Co., codes such as T0, T2, T4, T6, T8, etc. appear as so-called ‘creep / STC codes’ – they indicate the combination of temperature and creep compensation, matching the material of the spring (steel, aluminium, etc.). zemic.co.za+2Zemic Europe+2A Chinese overview explicitly mentions:‘T0: Temperature self-compensation’,‘W: Welding Wire: Silver, Enameled Wire, Cable’ – W therefore stands for the variant with soldered connection wires. WayDigi Site Name
This fits your component perfectly: “T0” at the top and ‘W’ on the right, plus the soldered copper wires.
Exact type?
Unfortunately, I cannot read the exact type (e.g. ‘BF350-3FB-T0-W’ or similar) from the photo because:
the actual type code (BF..., BYM..., ZF...) is normally printed below/on the side – in your case, it seems to be covered by silicone and the wires,and there are several 4-grid full bridges with similar dimensions in the catalogues (backing e.g. 9.8×7.3 mm, 10.0×6.5 mm, etc.). zemic.co.za+1
However, you are certainly correct with ‘4-grid strain gauge / full-bridge strain gauge’.
How you could continue searching / replacing
If you want to find a replacement part or data sheet, search the internet for combinations such as:
four grid full bridge strain gauge T0 WBF350 4FB T0 strain gaugeZemic full bridge strain gauge W T0
and compare the backing size (~11.5 × 7.3 mm) and the grid arrangement in the catalogues with your photo. tst-scale.com+1