minecraft mob traps

so i am building multiple traps on minecraft (pc). nearly all involve redstone but some are just as simple as a bucket of water and a shovel.i will call the first trap, water way the second ,tnt tazman the third, trap door dynamite the fourth, piston power and the last, wolf power when i complete all of these you will understand the names.mob traps are a great way to protect your house or even something to do around your house in your spare time.alls of theese traps are 100% from scratch and i am not copying anyone from a website or youtube.also if any of you guys have an idea it would be great if you could send me a message,and i could try and build it .this is my first project on planet minecraft so any help is apreciated .so thats all from me guys hope you enjoy my traps and see you next time.