but still my output voltage via .1 to .5 volt is about 8.7-8.9
the correct value as i calculate should be 1 to 5 volt not 8.7 to 8.9
what is my fault?
Dear LvW i do it in reality not as a simulationBy the way: Are you speaking about measurement data or simulation results?
. continue post #8
* If the pot-output voltage is 0.196 volts (with R2 and the rest of the circuit connected), this voltage gets amplified with "-10".
However, since you work with dc there may be in addition an offset influence which shadows the result. Thus, repeat your measurements with an ac source instead of 10 Vdc.
Supplement: What about your dc measurement? Are you sure it is correct?
* The application of Thevenin`s rule is not correct; if you measure 0.196 volts with R2 connected, it is not correct to use another R=196 ohms
what is my problem!!!
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