As a followup to this post on what I am going to use for my angle sensor here is what I found. I am going to get a AS5048 magnetic rotary encoder and make a string pot. I will wrap the string around one of the big shafts on my table saw and as the shaft rotates it will pull the string and rotate the encoder. The encoder is 14 bit and will give 0.05 deg resolution. I will have to do a little math in the controller to convert to the correct blade height and blade angles. This will be a cheap solution with High accuracy. If the shaft I wrap around is larger than my string pot shaft I will also have added mechanical advantage and increase the encoder revs per 1 saw rev giving better resolution yet. The sensors are $12 - 20 depending where you get them. Aliexpress has them and Ebay. LINK
I am going to couple the 2 encoders to a arduino and a OLED display to show the angle and blade height. Probably wont get to it all until I have time this winter but I think I can have all the components and code ready to start with.