Minecraft Auto-Miner!
Are you in need of lots of resources, but can't spend tons of time strip-mining? Do you want a hole to bedrock for your base? Well, I have the perfect solution for you: the TNT Auto Miner!
Using a simple to build redstone clock and triple TNT dispensers, this will give you a really big pit! (watch out for the lag though! )
Supplies
Stone blocks
3 dispensers
3 stacks of TNT
A lever
Redstone dust
a comparator
Foundation
Build up 8 blocks with the stone blocks. Then add 3 dispensers on the sides . Build a 2x2 square off centered to one of the sides. The foundation is complete!
Redstone Clock
Add a comparator to one of the sides, then encircle it with redstone dust. Turn the comparator on ( right click) and connect each dispenser to the redstone circuit.
Put a block behind the comparator and add a lever on top.
Load the Miner
Fill up every dispenser with at least a stack of TNT, as this thing eats through it like no tomorrow.
The End
Flip the lever and watch as the miner eats through just about anything!
This thing will find lots of ores and other caves too!