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Arduino Controlled Auto Sniper

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Arduino Controlled Auto Sniper

Unread postAuthor: pneumaticcannons » Wed Oct 02, 2013 4:23 am

After becoming frustrated with the impracticality of my bbmg in airsoft games, and being too cheap to buy an alternative, I decided to create the most accurate airsoft gun I could.
Then, for the hell of it, I slapped a micro controller and 2 high power solenoids to it :lol:

Random Specs:
Controller: ATtiny85
Bolt: machined aluminum
Receiver: drill press'd block of acrylic
Hop up: adjustable
Select fire
Practical operating pressure: 100-200 psi

Stuff:
The pneumatics simply consist of a 3-way/QEV combo. More on this here for those who don't know what i'm writing about. 2x24v solenoids at the front of the gun load a bb and pull the breech closed when energized. Once fired, nothing but good old rubber bands pull this open again :D Both the 3/2 valve and the solenoids are over-voltage'd to 36 volts, which is supplied by the 12v-36v step up.

The firing cycle is controlled by the ATtiny when the trigger is pulled. This is the main advantage of a pneumatic/electronic gun v.s. a pure pneumatic gun. This way, I may change the firing mode, ROF, and possibly even power(although I haven't attempted to alter power yet)

A typical firing semi-auto cycle goes like so:
1. Trigger is pressed

2. Reloading solenoids energized to load bb and close breech
3/2 way valve simultaneously energized to allow air into the QEV.

3. 3/2 valve power is cut to vent QEV pilot and therefore fire gun

4. Power to reloading solenoids cut so the breech may retract to it's open position

5. Repeat

More pictures, videos, and descriptions will be soon.

Yes it's ghetto and ugly. But hey, it works :wink:
Image

Step up:
Image

Main Control board + ATtiny:
Image

Receiver:
Image

Solenoids:
Image

And a short video of it cycling in semi auto mode:
Image

There is still much work to be done and i'll try my best to keep this updated

Last time I wrote that I disappeared for a year
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Last edited by pneumaticcannons on Sun Jun 01, 2014 6:15 am, edited 1 time in total.
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Re: Arduino Controlled Auto Sniper

Unread postAuthor: jackssmirkingrevenge » Wed Oct 02, 2013 6:52 am

pneumaticcannons wrote:Yes it's ghetto and ugly. But hey, it works :wink:


Son, is that you :shock:

Image

How about an actual airsoft magazine though for feeding?
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Unread postAuthor: POLAND_SPUD » Wed Oct 02, 2013 8:46 am

Son, is that you
GTFO it's MY son :D though you can still pay alimony

Excellent work pneumaticcannons!!
...or should I say electropneumaticcannons?


damn you even put a step up module there
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unless we stop them now
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Unread postAuthor: pneumaticcannons » Wed Oct 02, 2013 8:51 am

Son, is that you :shock:

GTFO it's MY son :D though you can still pay alimony

:D
functionImage ImageImageform
How about an actual airsoft magazine though for feeding?

Yeah, or anything better than the 10 round tube mag I have on it now. The problem is spring tension. The current weak rubber band pushing the bb's into the gun is about as strong as can be without getting double feeds. But if I can find a mag for cheap over here this weekend, I might as well give it a go.

Excellent work pneumaticcannons!!
Thanks PS :)
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Unread postAuthor: jackssmirkingrevenge » Wed Oct 02, 2013 2:48 pm

POLAND_SPUD wrote:GTFO it's MY son :D though you can still pay alimony


You do realise the unholy union you are implying here... *shudder*

But if I can find a mag for cheap over here this weekend, I might as well give it a go.


We have M16 30 round mags for $6 here, I'm sure you can do better :D
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Unread postAuthor: mark.f » Wed Oct 02, 2013 8:13 pm

Very nice work PC. I stopped myself from commenting on this picture. :P

I think a power selection switch would be cool as well. Perhaps with an arduino micro/nano instead of the attiny you could make an LED-backlit LCD->collimator>half-silvered mirror HUD/sight thingo to go with the controls.

I do hope you keep us updated on this and whatever else you decide to build.
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Unread postAuthor: dart guy » Wed Oct 02, 2013 8:15 pm

gunsmiths for halo weapons may be ready to take over with special electronics
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