I want to make a serie of simple logic systeme you can make and explain how they work
And this one is the first one
Very simple it work whit a logic hurling spanner, and inverter and a reader
If the reader read a 0, the inverter send a 1 to the logic hurling who reaper the component
If the reader read something different from 0 , the inverter only working whit 1 and 0 send a 0 to the logic hurling ans nothing append
Able to store 20 spanner, the automatic hurling can hold hours before needing to be refiled
this system is not mine, in fact it's a better system than one i'v personally made, but i just wanted to share you that like to guive you a small tuto
if you have any particular need i can create it and explain how to make it work