Mortar TNT Cannon (1.8+)
By: Overlord_Aqua_2

Hello everybody, it's Overlord Aqua@2 here in tutorial for making a Mortar TNT Cannon. I've been experimenting something on TNT when bouncing on Slime Block so I make something new which I called it Mortar TNT Cannon. This experiment took me 6 to 7 hours on how it works and safe explosions and I'm happy to share this to you guys and not being selfish that I'm the only one who knows this creations. :)

Items you need to build:
►2x Slime Block
►2x Sticky Pistons
►1 Lever
►Redstones
► Any blocks for placing Redstones
►1 Dispenser
►7 Redstone Repeaters
►1 Redstone Comparator

Tutorial on Making Mortar TNT Cannon:
Step 1: Start in the area by placing the Green Wool (or anything you want). This is where you place the Redstones.


Step 2: Put the Redstones on the correct directions and places.


Step 3.1: Tick the back/front Repeater on max and leave the other one. (This will trigger the 2nd Piston after the 1st Piston launches the TNT)


Step 3.2: Tick the Repeater 2 times on the middle part. (The Dispenser must be triggered 1st before the 1st Piston next to it so it will pust the TNT, then fall to 2nd Piston and bounce up.)


Step 3.3: Tick any Repeater 1 time and turn on the Comparator on the last part. (This will signal through the Pistons and Dispensers.)


Step 4: Place the Yellow Wool (or any block), Dispenser, Sticky Pistons, and Slime Blocks on correct formation.


Step 5: Make a route of Redstone from Lever to Comparator.


Step 6: Put the TNT on Dispenser and try it by pulling the Lever.


You can also add Hopper and Chest on the top of the Dispenser to load more TNT.

I hope this tutorial is helpful. Sorry if I'm not able to make a video but when I can, I'll put it here.