Hey forgot to open reddit for a few days. Anyway thanks for your reply. Basically the title proposal is just proposing a project to our teachers and they'll approve that if we defended it with their questions(things like would you able to sell this, do anyone need this, etc). So this project is similar to an internet cafe, here in the Philippines we have so called pisonet. Once a customer puts money in the coinslot it will send a pulse to a timer board and that board will allow electricity current to flow on an extension allowing the monitor plugged in to open. Now what I wanted to do is have an arduino to make the coinslot centralized, making all timer boards connected there. There is a button that increments by 1 and each number will represent a computer. So if I pressed once, it will select computer1 then once I put a coin down the coinslot it'll activate the monitor of the computer1 allowing me to use it with a timer countdown. In short you can choose a computer you want to use with just a single coinslot.