Often coils have to be custom made for your application. I started making my first coil by simply taking a bobbin and wire and winding the coil by hand (see left). This can be a very boring job. So it was time for a simple winder that is cheap and easy to build. I didn’t want to wind by hand and count the windings in my head any more. So the winder had to have a motor, a rotary encoder and an arduino to do the counting job. Continue reading
Now that our rotary encoder or quadrature encoder hardware is up and running it’s time to tell our arduino what to do with the signals. We want it to count the pulses of the simple encoder. The quadrature encoder counting up and down depending on the turning direction is what we also want. Continue reading
In this post we will add a second photointerrupter to our rotary encoder. This will give you information about the direction your rotary device turns. So you will be able to count forward and backword depending on the turning direction. This is necessary e. g. for many positioning application. The encoder we will make is also called a quadrature encoder. Continue reading
In the first and second post of this series you saw the basics of how to use photointerrupters. Now it’s time for practice. We make a rotary encoder. Here we take a single photointerrupter that gives us the pulses we can count. In a later post we will take two of them to get information about the direction of rotation. But now let’s start with the simple version.