Hey guys, I'm a member of a forum that deals with creation of replica armors of different Genres, but mostly the Halo universe. One of the things they like to recreate is the MA5B Assault rifle. I know you can find kits that can do the same as the circuit I'm thinking about. It has to count down from 60 when the trigger is pulled and reset when either a button is pressed when you remove and replace the magazine. Some ideas please. I'm not asking for schematic diagrams but if you have an idea, feel free to post it here.