Hello,

A certain incremental encoder has fallen into my lap.

Its a 2 channel hall effect (magnetic) unit - and the hall effect chips switch between .4 vdc and 1.2 vdc in its current circuit. For a full 360 degree rotation - it will switch 36 times between a full high-state and full low-state. But it is supposed to be useful for resolution down to the degree.

The hall effect outputs are analog producing sinusoidal rather than a square wave signal.

I suspect the design intention for this type of encoder is to perhaps drive it with a clock frequency instead of a constant + voltage. The clock frequency would be fast enough to split the the sinusoidal signals into slices.

So each sinusoidal cycle would look like a ladder incrementing up to 1.2vdc - and then decremeting back down to .4vdc

So if we sliced 1 sinusoidal cycle into 10 slices - and took a voltage reading during each slice (i.e. high clock state) then for a full 360 degrees of rotation - we would end up with 360 slices. Thus we get a 360 degree encoder.

I'm wondering if anyone has every worked with this type of encoder, and could you share how you did it?

Very sincere thanks!!

Mr. D