Close

PoC

A project log for Capacitive foolery

wannacheap encoder

besenyeimbesenyeim 04/06/2019 at 16:410 Comments

AFAIK today's capacitive and inductive encoders use continuous AC signal to measure the impedance of variable elements. They need dedicated analog circuits, tuning and close tolerance parts. These make them more expensive.

BTW I'm not deeply familiar with analog circuits, so in my other project from last year I used a different approach. It is easier (for me) to understand.

Now I tried this:

left side: stator, right: rotor/slide

top: two input plates; bottom:output plate; right: slider


Input: invert square wave signals.


one input and output
slider on the other side

Discussions