Hi all,
i'm designing a circuit to amplify two extensometer (Flintec XT50 http://www.flintec.com/Type_XT50_Extensometer.html) and sum their values.
I would like to know if in your opinion it is ok or there is something to change.
The power supply is given by a 12 V battery as input for a LM7805 regulator.
The main issue that I'm experiencing is that the gain is not so high. I cannot use an high gain resistor, since with an input that is very low (some mV), as soon as I go over 1 KOhm for the gain resistor, the output saturates and goes close to 5 V.
There is any kind of configuration for the inputs that I should take into account?
What I'm doing wrong?
Thanks
i'm designing a circuit to amplify two extensometer (Flintec XT50 http://www.flintec.com/Type_XT50_Extensometer.html) and sum their values.
I would like to know if in your opinion it is ok or there is something to change.
The power supply is given by a 12 V battery as input for a LM7805 regulator.
The main issue that I'm experiencing is that the gain is not so high. I cannot use an high gain resistor, since with an input that is very low (some mV), as soon as I go over 1 KOhm for the gain resistor, the output saturates and goes close to 5 V.
There is any kind of configuration for the inputs that I should take into account?
What I'm doing wrong?
Thanks