Use an Arduino board to control different gain coefficients from an operational amplifier.
Project showcase by lucian_vdo
Measure the unknown resistor with a simple configuration!
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Thank you for observation. I changed the schematic and I saw that in Fritz lib doesn't exist quad switch 74HC4066 so, tthat schematic was wrong. I will try to fix this deficiency. Now, I hope the new schematic will help you :)
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