My friends and I enjoy playing paintball out in the Arizona desert on occasion. It’s great fun, but sometimes pelting someone with a couple hundred paintballs traveling at 300 feet per second just isn’t enough. Sometimes you just need something extra…. So I built the paintball mine that you will see in this instructable!

Step 1: Concept

This paintball mine is based (i.e. ripped-off) from a patent I found online. (US # 6,688,234 B2) Browsing patents online is a great way to come up with cool ideas for your own projects! The mine is a small canister that you bury in the ground, filled with liquid paint. A standard 12 gram CO2 cartridge is inserted upside down into the canister. A top with a plunger centered over the cartridge is screwed on. When someone steps on the plunger the cartridge is pierced, pressurizing the canister and expelling the paint. I feel the original patent has a simple, but serious design flaw. Look at Diagram #1 below.  When the CO2 is released it follows the path of least resistance, and blasts directly out of the holes, carrying some, but not all, of the paint with it. It also tends to create more of a thin “aerosol spray” with the paint. Diagram #2 shows my design, which adds tubes/nozzles in the holes with a small gap beneath them. When the CO2 is released, it cannot travel down to the tubes, so instead it pressurizes the canister, forcing almost all of the paint out before it can escape out through the tubes. This results in more of the paint being expelled in a thicker and more forceful stream. 
<p>Hi, I have a question around the 2 pins/ nail like things at the top holding the pressure switch up. Do they have a purpose or can I build the mine without hem. Will this not obstruct the preasure switch from pushing down properly? </p>
Hello! You'll notice that the two screws at the top only appear on the patent, and not in my design. I'm really not sure why they showed them.
<p>I figured out what the're used for... So when you build your unit and the whole thing is airtight the canister tends to shoot up with great force. The're there to keep that from happening. </p>
Out of mere curiosity is there a riot paint round? Like a aerosol canister for teargas,technicly oc pepper gas as tg rounds work difrant but you get the idea.also this can be emailed to me
And over look the typos.i gave up correcting my phones auto correct long time ago
Also a way to remotely set this thing off.allmost forgot.or a delay of sorts so i can have time to place it under my trailer and get back.maby a bakeing soda/vinegar mod?please hot me up on this,emails creeper0629@gmail.com
Im considering an option like this to make a diy bug bomb.all you need to 86 a bug is cooking oil.id like to tweek this in a way that allows for a slower and longer dispersal.if yall could send a diagram or idea to my email,creeper0629@gmail.com,id be most greatfull.i am in the middle of the bigest black widow infestation i have ever seen in my 30 years of liveing.at this point i can say i could be in some level of danger.i smoke,get bit,i take out the trash,get bit,i look funny at the grass,get bit.this can happen at any momant.this was drove home today as i watered my gardan and felt something on my toe.look down,black widow.i have had it with these punk ass spiders and i plan on declareing war.cooking oil may sound wierd but it kills every bug on earth on contact.smothers them.and they cant build emunity to a lack of oxygen.and i got a last resort should that fail but it is bad stuff.not safe at all like oil.kills people ans flys both.i dont want to go that rout.so please help if possible thanks.<br>Ps,to anser why i dont spray,thats as bad as my last resort.my asthma would totaly go off the deep end.dust is allready killing me.pluss i have seen bugs walk away from the meanest sprays.and im a diy guy thats also why im allways here,lol
What's the cost for materials ?
that barrel is somewhat rare, it's a really nicely made j&amp;j .
<p>awesome you have to dig deep</p>
<p>Very nice build, but I will suggest a larger activation point, such as a &quot;plate&quot; drilled with countless holes that let the marking paint pass through. Other than that, It looks great.</p>
great idea
Dude that is awesome
U r smart is it ok if I make 1 for a vid on YouTube I will give u all credit
Thank you for this information. I have some <a href="http://www.auroraplumbing.com/Service.html" rel="nofollow">Seattle WA plumbing services</a> coming by soon but I would like to fix some of the minor things before they get here.
Any chance this works witth airsoft bb's
Dude- why not try it, and report back to us? kaptaink_cg went to the trouble of writing this 'ible; he probably would have mentioned bb's if he tried them... but that is where you can help out. For Science! <br>And because now I'm curious too :-)
love it,work's great go to my profile if u want a paintball game mode
Hey i tried the out works great <br>Thanks!!!! <br>i had a mod that i made i used thin membraned balloon fixed on each of the outflow pipes and then i just incresed the canister size for 12 to 50gms and ta da <br>the pressure filled in the balloons and the exploded spreading the paint over a larger area <br>
to modify this to use it with a trip wire, you could replace the plunger with a solid piece holding a spring compressed and held by a safety pin. wire is tied to the pin, wire gets tripped, pin pulls out releasing the spring to drive it into the cartridge. super simple and effective
its adapter not adpater lolollol
It's &quot;LOL&quot; not &quot;lolollol.&quot;
Nicely done, m'sieur
i think that it would be better without the 4 spray tubes because without thhem you could get a wider range and possibly get more people, just my thoughts
Without the 4 tubes, you can't truly &quot;pressurize&quot; the chamber. You'll probably get a bigger spray radius, but the CO2 will take the path of least resistance out, meaning it will just go straight for the holes and will leave at least half the paint behind.
What if you used cones or something?
Please tell me what website i can go to so i can look at patents.<br /> thanks.<br />
<a href="http://www.uspto.gov" rel="nofollow">United States Patent and Trademark Office</a>
Try:&nbsp;<a href="http://redirectingat.com/?id=487X782&amp;url=http%3A%2F%2Fwww.google.com%2Fpatents" rel="nofollow"><span style="display: none;">&nbsp;</span>http://www.google.com/patents</a> <br /> <br /> There are others as well.. Just google &quot;Patent search&quot;
made this and i worked awesome the only problem was since their foot covered all the tubes thats all the paint hit. Good Instructable though
You could modify this so that instead of shooting straight up, is shot out through a side pipe (maybe a foot or so) before turning up with an elbow.
ok, im not 100% clear on what the union is, i looked for it on home depot website, and even on google but none of those look like the union you have
just go 2 a local hardware store and you should be able to find one... and if you dont know what a union is you probably shouldn't be doing this because you have never worked with any of these materials.
a union is also called a coupler
Technically, a union is a coupler that comes apart in the center with a threaded joint. This allows you to weld or solder (in the case of steel and copper pipe) or glue (PVC) sections of pipe together, and still be able to disassemble them. This is sometimes necessary when you have several threaded connections, each one of them needed to be threaded in the same direction!
everyone starts somewhere :)
ya true
go to you hardware store and ask for a schedule 40 pvc coupler
the piece of pvc that allows you to connect two picese of pvc the same size together
i found it under pvc connecter
The union is also called a coupler. It joins two pieces of pipe together. On the Home Depot website it's called &quot;1/2 In. PVC Coupling Model # 429-005HC&quot;
How are you supposed to bury this thing without any of it showing but not have the spraying tubes underground?
Instead of using a PVC pipe cutter i just use a hack saw.
Another good idea is to make a tripmine. You connect a wire to the Co2 thingie, which goes into the nail, and then when the Co2 moves up the tube, it goes through a tube surrounded by paint, which goes into the barrel too. (I dont know what principal :P) It then comes out and hits a thin mesh, which spreads it thinner. This will spray anyone who trips the line. And maybe some other people too.
Whyd you post this in an airsoft group?
I working on a tripwire version of this mine, I going to post it when I'm done, I just started the prototype a day or two ago.
Nice! Can't wait to see it. I had always planned on doing a tripwire one,but still havent gotten around to it.<br>
Thats why i like airsoft because i can go home and lay on the couch after a game and i dont have paint all over me. I also like the airsoft mines better!
I saw this a while ago, and, remembering how cool it is, decided to come back and suggest some improvements. <br><br>1. larger spray radius, with the paint tubes less centralized. with your design, it looks like the paint only goes onto the bottom of someones shoe, if they step on it directly. I reccomend making the paint tubes come out the sides, and curve upward, so as to spray in a wider radius, to possibly hit multiple players. <br><br>2. Make a larger contact plate, or modify it to work via tripwire. At the moment, it looks like the trigger is only about an inch in diameter, easily pressed. you should increase the surface area of the plate. Maybe just glue some sticks or the lid of a tin can to it, as long as it doesn't get in the way of the spraying paint, it cant hurt.<br><br><br>amazing mine! i am i the process of making one to use flour instead of paint, for airsoft.
How do you manage the logistics of placing and retrieving the mine?

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