MineCraft Tutorial #4 [Simple Clocks]
This is what I used in my Red Stone Facility to get the roof-dispensers to repeat. It is a simple system that will constantly repeat unless a toggle-able input is introduced. It focuses mainly on 5-Clocks because they are the fastest you can go without burning out the redstone torches. There are 4 clocks which are also stable but they are more complex and space/resource hogs compared to odd-number clocks.
I also exhibit a little trick I discovered (probably not the first, but I'm proud of myself regardless) which speeds the 5-Clock up while keeping it stable.
I show off the 5-Clock DIspenser in Home Update #7: