SpudFiles

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

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 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


Step up:


Main Control board + ATtiny:


Receiver:


Solenoids:


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


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

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

Son, is that you



How about an actual airsoft magazine though for feeding?

Son, is that you

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

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


damn you even put a step up module there

Son, is that you

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

function form

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

POLAND_SPUD wrote:GTFO it's MY son 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

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

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.

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