At Original poster.
wow this is great, and guess what? I just finished learning about 7-segment displays in my digital electronics class like a week ago. I could probably build that based on the schematics you provided, of course we haven't started learning how to create circuit boards yet, only how to breadboard
But still, this is extremely useful, have a few questions though.
1) Are those AND gates with the little open dots in front or are they NAND gates, I can't tell whether the dots are just part of the schematic symbol or there to show it's a NAND gate as I am too accustomed to Multi-Sim. Same for the other gates.
2) What Simulation software do you use?
3) The cost estimate is including time you spent laboring over it, obviously, but what would it cost for all the supplies needed to make the circuits if I went and just bought them from..say..radio shack for example, or another electronics store.
Also, this is in response to the simulated recoil, maybe you all are looking at it a bit too critically? What if you simply use Co2 cartridges to simulate blowback? I imagine you could get quit a bit of blow-back before needing a new one if you use it just for that and not to fire anything.
Maybe take some parts out of a paintball gun/pistol, or an airsoft blowback Co2 pistol?
Just thought I'd put that out there, since in my experience, Co2 tends to be very effective at simulating recoil, many high-end airsoft pistols I have used, simulate a very nice blow-back/recoil action with the gas, and that is with Green Gas/propane, with Co2, it should be even more powerful.