99chan

File 141394309261.jpg - (72.78KB , 852x351 , conditioning circuit annotated.jpg )

Anonymous 14/10/21(Tue)21:58 No. 561

hello /calc/ulords!

I'm working on a project that amplifies an 1-6mV output voltage from a pressure sensor by a factor of 500, to get voltages in the range of 0.5V to 3V

Problem is, the op amp is actually amplifying by a factor of 60, not a factor of 500. Does any electrical people know why this is? What about op-amps causes an order of magnitude in amplification? Is it because the circuit diagram calls for R1 to be 470Ohms but in my real life circuit R1 is actually 270 ohms?

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>>	Anonymous 14/10/21(Tue)22:00 No. 562 File 141394322215.jpg - (126.30KB , 540x720 , gent.jpg ) data sheet for all three OP-amps (LF256N) https://www.dropbox.com/s/jcn99zprfxpazb6/NS%20LF356N%20datasheet.pdf?dl=0 I'm a non-electrical guy doing electrical work :(

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