Design and make A circuit with a sensor and a host interface --- that does clearly say 'a' circuit. Clearly I must be an over achiever since I seem to have made a gazillion circuit boards for this one assignment. The sad thing is only a couple actually worked.
The step response board worked finally as did the temp board. Unfortunately the temp board didn't work long and then I caught the thermistor on the edge of another board and ripped off some traces. I don't think that ripping off traces well is a desired skill or capability.