Turbo Mini Forums

A very simple solid state circuit aroud something like the ne555 chip you mention can give a variable square wave signal. It would vary the frequency between whatever range you choose from a starting resistance to max varied by a potentiometer. What you connect it to is your choice as robert said the actuator arm moves set amounts dependant on boost. But as others have said a programable ecu is more acurate. weren't you gona be using one on the pickup v6 thing rubicon

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901