Need timer help

[Tasslehawk]

First let me say Hi.
I need to build a timer that will power 110v motor at the same amount on and off. I have found a few diagrams to build one using a 4541 Programmable Timer chip but the fastest it will go is .5sec and I was trying to find a way to go from .1sec to maybe 30sec in .1sec increases. If anyone can point me in the right direction it would be greatly appreciated.

Thank you
Ed

 

[blueroomelectronics]

Is it an AC motor? Why would you want to do this?

 

[Tasslehawk]

yes it is an AC motor. I am building a wave generator for my Aquarium and I need to be able to change the speed that the pump turnes on and off so that it will make a smooth wave in the tank.

Ed