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You can cut the power dissipated by the bridge almost in half by changing two of the resistors to a higher value.Hi
I have a wheatstone bridge circuit reading a change in resistance of a strain gauge through op amp working fine but need to reduce power while keeping the circuit working
resistors 120ohms s/gauge 120ohms voltage 5volts i am not an expert
any help thanks
Hi
I have a wheatstone bridge circuit reading a change in resistance of a strain gauge through op amp working fine but need to reduce power while keeping the circuit working
resistors 120ohms s/gauge 120ohms voltage 5volts i am not an expert
any help thanks
I assumed you were using an instrumentation amp.The op amp is a mcp6292 microchip and the gain is 100
the res into op amp are 100k + side and 1k - side and 1meg bias
thanks
With an instrumentation amp, you could make the other leg out of 10k resistors, reducing the bridge current from about42mA to about 21mA.hi
I dont have a schematic drawing yet on the computer .The op amp is a rail to rail amp thanks for your suggestion it already works increased resistors from 120 to 270 and it has dropped from 32ma to around 20ma much better. Dont know how far i can go yet with the resistors. Dont have much time at the moment to play around with it so a bit slow to post
thanks
bee