Arduino potentiometer replacement

[johnerrington]

You need to use the " Non-inverting amplifier" circuit shown here

Using Operational Amplifiers in your Arduino project

3: BASIC CIRCUITS USING OP AMPS: Op amps can be used in many different configurations, but the simple circuits described here cover most applications. Unity gain buffer, inverting and non-inverting amplifier, difference amplifier If you feel some of this is getting too technical you may wish to skip any bits in italics. Unity gain buffer. A "unity gain buffer" gives an output voltage that is the same as the input voltage See also here The important feature of this circuit is that it takes…

If you choose a rail-rail op amp such as the AD823 that will run from 0V and +15V rails and give the output you need