Hi Ben:
I enjoyed your episodes on the dog treat dispenser. One question about your design decisions: Why did you choose to use a continuous rotation servo & an optical sensor, rather than just a regular servo? Your design requires 180 degree rotation. A regular servo could go 180 degrees in one direction, and then 180 degrees in the other direction, and your mechanical design would still work. You could then use the regular servo's position indication and omit the optical sensor. Did you consider this and reject it? If so, why?
Thanks,
David Harvey