I hooked up the scope today. My circuit looks like it is picking up emf. I dont have it potted or anything so this is a huge problem.
The tiny tach is a perfect digital signal 0-5v. I didnt have a chance to take a pic, but like i said its a perfect square wave. Any thoughts on why the code doesn't work? I'll just use the tiny tach for now.
Does anyone have an idea to protect it from the emf?