Homemade paintball gun

[)DEMON(]

I found this link where this guy is making a paintball gun,there is one thing that is confusing me though,what is that electric circuit he is using to control his system and how is it working?

http://www.gizmology.net/pbm.htm

[rna_duelers]

I got no idea,i'm to lazy to read the whole article it would probably explaine but i did see the words 555 timer so maybe its a timer for the release for the co2 so it doesnt always just vent.

[Benny]

yes, it is a 555 timer circut to control the valve.

[Mihlrad]

It didnt work, the guy stated it didnt on paintball nation, the valve and whatnot or something didnt work, and it only shoots like 5-10 feet.

[iamthewalrus]

this is kinda on topic. can anyone here explain to me how the valve on a Tippmann 98C works, i cant figure it out and ive been thinking about trying to make a paintball gun myself and would like to use that kinda valve once i understand how it works. Thanks.