Design a PCB to read an analogue signal from a strain gauge (Load Cell) with the reading ultimately being read using a Raspberry Pi or Arduino.
The strain gauge we need to use is an H10J-15t-32-dxx Load cell.
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The problem is the small voltage coming from the strain gauge.
The strain gauge sensitivity is .045 mV/V + or - 0.05 @ 6 tonnes
We have tried various analogue to digital boards which have worked with the smaller strain gauges up to 50kg, but we need to measure accurately on this strain gauge which measures up to 15 tonnes.
We need to be able to measure within an accuracy of + or - 10 kg but would prefer to 1 kg
We need to be able to connect up to 8 load cells. This should be on one board.
We have not been able to read the small signals with the following A2D boards ADS1115, ADS1015 and MCP3008 with amplifiers.
We would like you to give a brief description of your solution identifying any components you think would be able to handle the measurement of such a small voltage.
If a board is developed or if you are going to use an existing board, then we need to be able to interface with the board using a Raspberry Pi.
We will only release funds after we have a prototype built, tested and reading the measurements accurately.
PCB Design (Gerber file format preferred)
Component list and a Bill of Materials.
An indication of the build cost of the board and components,