Hi,I've got a servo/robotics project that currently suffers from a lack of repeatability and precision. At the moment the project uses a 555 timer circuit and a potentiometer to move the servos. I think the lack of accuracy comes from a lack of precision in the potentiometer (despite what it may say in the catalogue)What I want to achieve is to be able to reliably move my input device (rotary pot, linear pot or anything else) to a pre-determined position and be confident that the servo itself will move to exactly the same position that it moved to before.
You don't really mention the end result of what you want to do, so suggestions are limited
There are 20 turn precision pots
That SparkFun 'joy stick' pot is pretty much garbage as far as resolution and repeatability goes
what about PC flight simulator joysticks ?
What about using push button switches, one for up and one for down?