How many different contraptions do you currently have in your redstone world?

I have been super interested in redstone for as long as i have been playing minecraft but only recently have i actually started learning the basics and making my own contraptions as well as copying from tutorials and stuff so i can learn how things work and make my own things using those techniques and etc. I have a redstone world currently that is on a server i have that isn't compatible with 1.13 sadly but i have a good over 15 i would say in that world from the things I've been learning and building myself as well and I would like to know how many contraptions all of you have currently in your own redstone worlds or even just let me know how experienced you are with redstone even if you have never touched the stuff. ^_^