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Update: Help Needed- Land Mine Answered

This is kind of a spur-of-the-moment thing, but an idea for an airsoft land mine just popped into my head. I already own a land mine, but it is horribly ineffective. It shoots baking soda barely an inch off the ground. People easy claim they did not get hit, and it's hardly realistic.

I could use your help building this. I only came up with a design, but not how get it to actually work. The *crudely drawn* design is below; it involves the unwitting victim stepping on a pressure sensitive plate. This plate triggers four air cannons buried in the ground loaded with baking powder and BBs. This hopefully blasts out in a much more realistic and impressive burst, and the victim knows they are dead.

Any ideas on how to get it working?



Here's another idea: make it spring powered. Saves the hassle of trying to build an air compressor. Place a spring in a pipe, attach it to a locking mechanism that releases when stepped on, place a platform on the spring. It would be kind of like a piston. (See second *crudely drawn* schematic.)


It's ALIVE!. I made the switch to spring powered, and the prototype worked! It shoots BBs 28 feet and baking soda about 4 feet. Now I need to improve it and make an Instructable.

19 Replies

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thermoelectric (author)2010-01-10
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whatsisface (author)2008-07-10

Possible to do, I'd do it electronically. Force resistor as a pressure pad which would send an input to a uC. The uC would then trigger some electronic solenoid valves (like you find in old washing machines) which would drop a meaure of vinegar down the tube into the baking soda below. Put the BB's in with the vinegar, and presto! Just make sure you have a good seal on it. You could even make it so the vinegar and baking soda go off when one plate is stepped on, and then when another plate is stepped on, the mixture releases, giving time for the pressure to build and making it more effective. Just some rough ideas, I've got a pretty good mental image of the mechanics.

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Spl1nt3rC3ll (author)whatsisface2008-07-10

The problem is I have no idea what a uC, or any other electrical doodad, is. Your idea sounds like it could work, but electronics are a little over my head TBH.

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user

uC is an abbreviation for Microcontroller.

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Bigev (author)thermoelectric2009-07-07

Hm. never knew that before.

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thermoelectric (author)Bigev2009-07-07

Learn something new every day :-)

Extract from wiki

Microcontroller, as "uC" derived from "μC", a computer-on-a-chip used to control electronic devices

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Derin (author)whatsisface2009-07-07

Or use an ordinary solenoid to pull the bar holding the piston in place.

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Spl1nt3rC3ll (author)whatsisface2008-07-12

I switched to spring powered. It's easier to build and I can churn out a lot of them in less time. Thanks for the help though, I appreciate it!

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guyfrom7up (author)2008-07-10

I'd say don't use a pressure sensitive pad, use a switch.
see my instructable for how to make a giant step switch, just make sure you let the glue completely dry and it's not sticky any more
https://www.instructables.com/id/Ghoul-Grabber/
I know it's a haloween thing, but it still applies

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Spl1nt3rC3ll (author)guyfrom7up2008-07-10

That could work. I'm brainstorming and thinking of changing over to spring powered though, I'll keep this in mind. Thanks!

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user

I decided to switch to spring powered, it is easier to make and reproduce. Thanks for the help though!

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Derin (author)Spl1nt3rC3ll2009-07-07

But,you could use a solenoid to pull the pin.

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Keith-Kid (author)2008-07-10

Does this in any way have something to do with new neighbors?

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Weissensteinburg (author)2008-07-10

What if you were to use party poppers...remove the confetti and fill it with BBs. Then just tie a string to them, and have it like a trip-line.

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user

I don't think that would be powerful enough. I've tried it before; the power is extremely subpar, the BBs practically roll out of the popper. Plus, party poppers have a habit of malfunctioning, most of them are duds.

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user

Really? I've never had a dud.

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user

Most of the ones I use do nothing when the string is pulled. Only a few in the bag actually work, in my experience. :/

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