I have a sensor whose output voltage, in the conditions I plan to operate it in, will be between 4.5V (max) and 3.5V (min). I want to increase the resolution of the ADC measurement of this value, so I want to create some kind of amplifier or signal conditioner that can change this range into a 0-5V range. None of the op amp circuits I've done in class have had a use for this kind of thing, and we didn't really do anything with signal conditioning at all, so I'm a bit lost here. I've looked somewhere else and found a single supply difference amplifier circuit, but it doesn't look like what I need. This is for a class project. I'm not asking to have the design done, just a pointer in the right direction There are two main constraints on this design: 1) Supply voltages. I only have +9V (from a battery) and +5V (from a regulator) to work with. Any design will have to be single supply. I have a pair of 358 dual op amps (so 4 op amps total) designed for single supply operation available for use. 2) It all has to fit within 10 rows on a breadboard, so it can't be huge and elaborate. If I eliminate one of the other sensors (which isn't critical to this project) I can free up 3 more rows, but 13 is the absolute maximum I can use. I don't think I have an instrumentation amplifier, which I suspect may be able to do this job, but I haven't used one of those yet either.