Here is my work of redstone, made in plot in creative world on mythicmc server.
There are some food and farms examples, piston doors i used in my castle design and for my friends.
Also there are some more complex machines i built by using my knowledge from digital electronics, such are 4x4 bit register with keyboard, for ALU and countdown machine with adjustable starting number.
Builds require 7x5 chunks, 70 blocks tall. Spawn point is at southwest corner at bottom.
I hope you'll enjoy designs.