The input impedance of this module is very high, if U1
is OP07 it is in mega/giga ohms, use CA3140 or LF356 fet input opamps to get
1 tera ohm input impedance, but for high gains OP07 is better as it is
ultra low offset. This is a good amplifier for sensor outputs, as it is a
Get Non-Inverting Op-Amp Tutorial
Slide the Potentiometers just like you would operate a Sliding Control. Drag the Knob on Pot to increase or decrease the resistance. The Resistance is shown is blue letters and dynamically alters value as you slide the pot.
The mV Source is varied by just moving mouse pointer over the two buttons, The mV buttons are special, the variation picks up speed if you let the mouse pointer remain on the button. This is Ramp-up and Ramp-down.