New clock generator

Two days ago a friend of mine told me about this new kind of clock generator that he had hear of/seen that didn't use NOT-gates(inverters) to make the delay and keep the signal going ON/OFF. Instead you use minecarts and a pendulum motion that makes the cart go over a preassure plate once or twice every cykle.

I have the designs set up so I just have to record the tutorial and upload it.