I wanted to put a platform that rotates some where, and have some kind of display that tells me the angle its at.
Is there some kind of easy existing (and cheap, the platform will be home made) project for this?. The accuracy does not need to be great, maybe only 5%. I don't see an easy solution, everything I can think of involves gear and slop error... can't exactly make gears at home easily, would need to order brass etc.
I would prefer some kind of analog solution, with an analog signal proportional to rotation angle, that resets when it gets to 360. This way I can make a scaling network out of op-amps and use a multimeter as a display.
Also, I can do a 1-1 ratio accurately (i will be cutting the platters with a hole saw out of wood), the size is not a problem
I may just use a camera and a feed to visually ascertain the rotation angle (I have all these things).
Also, I have two identical hard drive motors. If its possible so that they mimic each others position some how ( i think I saw something like this in an old military system), I could put one up on the wall with a disk on it to show me the rotation (this would be even better and simpler). I forget how they linked magnetic encoders together, if they were special some how, etc. Really don't give a hoot about how I get the information, so long I can decode it. I have considered using a long stick with a handle like a periscope too (though unappealing).