ok i made today this one thing because my front fan makes so much noise that sometimes im thinking that i live in airport ( but this one has a lot potencial huge flow rate), and yeah its the simpliest controller 
btw maybe somene has made one too? and can share some tech details because im thinking to make good one and for maybe 4 fans

And yeah its a crappy cell phone pic

btw maybe somene has made one too? and can share some tech details because im thinking to make good one and for maybe 4 fans


And yeah its a crappy cell phone pic
























