Recent content by AC0KG

The piezoelectric effect can be and is used for precision motion control. See www piezo-motor net for some industrial examples (check out the datasheets for performance info, I was pretty impressed with how fast they are, not at all what I expected). Whether you can use it directly to position...

There are a number of ways to do this. A basic approach would be to use some SR flip-flops to control the power to a motor which drives the pulley system. Stops on the rope would trigger buttons to turn off the motor when the flag reaches the desired location. Driving the flag in one...