pic microcontroller discussion list wrote: >> I have a linear signal that goes from +0.45V to +1.15V. I >> need to convert it to a signal that is +0.3V, when level >> is +0.45V and +10V when the signal is +1.15V. [snip] > I can't figure out why I see no replies. Anyway, to get started, > run the input signal to the non-inverting input, then create a > reference voltage (your "some type of offset") by making a voltage > divider with two resistors to get something in between. (.3+1.15)/2 > Figures out to .72 V. Tie that to the inverting input and now it > will switch as it crosses the reference point. > also see the thread "Voltage Conversion Circuit" a few days before Valentine's Day. It covers this type of circuit. You mentioned your op-amp was a R-R powered by 10V, and that you weren't getting the full range. Even a R-R won't truly go to 10V, but it should be pretty close. How close to 10V (and 0.3V for that matter) do you need to get? Maybe you should tell us a little more about what is supposed to happen to the output when the input is between 0.45V and 1.15V. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.