A bath scale has 4 cantilever beam load cells; one at each corner. Each beam is fitted with 2 strain gauges glued to one side of the beam and three lead wires, Red, White, black, go out of the cell to the pc board (12 leads in total). Resistance r-b=1K ohm; r-w=1K ohm;w-b=2K ohm. What is(are) the Wheatstone bridge(s) and circuit for the voltage as a function of total weight?


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  • \$\begingroup\$ Wouldn't you just do 4 bridges? One for each cell? \$\endgroup\$ – portforwardpodcast Feb 12 '14 at 9:21