I have built things like
- Monster Trappers
- Sewage Systems
but thats it lol. I do not understand how people make elaborate inventions with redstone wire and switches. What are some useful things you guys have created?
I've made multiple Cacti farms before, and I did build a monster trapper which worked semi-effectively (except the slimes spawned near it).
Yea mine kept getting blown up by creepers, and never seemed to work right.
I made a elevator with pistons.

