It a conspiracy !!!! all the clever people come out of the wood work and say its "easy" too !!!.
Its just a site i stumbled on and the whole point would be to make a PID controller to control the power draw. Without the micro processor it would be just be another speed control with a potentiometer aka : KBIC ( to my eyes anyways ! ) . The price of making this over buying the Super-PID makes it very tempting the learn PCB board software and get cutting but i had ago at Eagle awhile back and it frazzled my mind to say the least.
L8r