Automatic TnT Cannon: Large Clip

This is what I was working on the past few days, an automatic TnT cannon. The cannon itself is relatively small compared to the redstone below. This cannon is actually quite complex so listen.

 The whole cannon works on a forty-eight tick redstone repeater clock, which means it takes eight seconds per cycle. The pistons loading the TnT as the propellant inserts them two at a time, or cycle. This cannon is designed so that after four TnT is inserted as the propellant, it'll ignite. Which means this cannon fires every sixteen seconds. Four TnT launching one TnT.

The picture above is the counter. It is used to move the sand when the time is right. The picture below shows the ammo used. Each row has ten TnT and when the piston is finished pushing the row, the counter will send a signal to push over the next row of TnT to be loaded.

 This is the mechanism used to store and push the propellant. Cobblestone from a generator is used to help push the TnT along.

 A vertical piston is used for pushing the ammo and the propellant along, they both use a redstone clock to time the cobblestone generation.