MDS
Member Since: September 3, 2009
Country: United States
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Does anybody know who the manufacturer of this device is?
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I have four sensor that appear to be very similar (three wire load sensors) from a bathroom scale. I've wired them as if they were each 1/2 wheatstone bridge (using the red wires as the signal) with Back = VSS, White = VDD (3.3v). This gives me two opposing wheatstones. Each pair of signals (red wires) is read by a differential amplifier and fed into an ADC. They are placed back into the bathroom scale frame and set on the floor. Their differential readings for each pair are: -0.00037500 -0.00000000
with 80 lbs placed on the scale they read: -0.51137500 -0.00075000
I've had one of the sensors out for inspection and placed it back into the scale, I'm assuming this a major contributor to the descrepencies at zero weight placed. Either way, does this sound like correct placement? If so, why would a scale utilize two wheatstones? Thanks for any insight...
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CRobo
This device is at the 532nm wavelength, no need for IR (infrared) filtering which is down beyond the 700nm wavelength.
See:
http://www.imt.liu.se/edu/courses/TBMT36/artiklar/intro/6.Spectrum.pdf
No public wish lists :(