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"In the world of spuds today"

A place to ask general spud cannon related questions.
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Unread postAuthor: mark.f » Wed Mar 06, 2013 4:32 pm

Well, in the spirit of "just do it and see if it works", I threw something together with what I had to dim an LED... if I had a larger pot I could get a little more control... Switching frequency is about 300-odd hertz.

Diagram

Image Image Image

Should be easily adaptable to heating a small coil of wire.

I also really need to get a breadboard. :roll:

EDIT: ran the output to a 1/8" phono jack. While I did get some groovy sounds, it was clipped all to hell and I couldn't really make out anything.
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Unread postAuthor: mark.f » Fri Mar 08, 2013 6:54 pm

Double post, but this is a better circuit using about a 1.4 kHz switching frequency. Also, I got a breadboard. :P

Image Image Image

I CBA to find a 470 ohm resistor so the "full brightness" of the LED is a little dim.

EDIT:
[youtube]http://www.youtube.com/watch?v=E1r0cwC4DrA[/youtube]
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Last edited by mark.f on Mon Mar 11, 2013 10:52 am, edited 1 time in total.
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Unread postAuthor: POLAND_SPUD » Fri Mar 08, 2013 7:02 pm

Also, I got a breadboard
breadboards are awesome but get these too
Image
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Unread postAuthor: mark.f » Sat Mar 09, 2013 6:19 am

I probably should. I had a set of tinned jumper wires lying around so I used those since I was out of hookup wire. :wink:
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Unread postAuthor: jakethebeast » Mon Mar 11, 2013 4:04 pm

I was lathing some parts for my tennis ball cannon today with my good friend Toni. The old 3" male thread adapter needed some cleaning and the 110mm PVC plug needed a 40mm hole to it.

Simplest way to do them was with a wood lathe and some weird couges and off center drills :D Let the pics speak for themselves

Driling the "center" hole
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Making it bigger
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Almost there
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Part done!
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Other angle
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Now working on the 3" adapter

Cutting some ugly parts away
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Squaring the face for good disk seal
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Done! Looks rather bad in the pic but actually its smooth as silk :D
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Also got his huge ballbearing today (measures about 30mm)
Image


What ya say? :wink:
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Unread postAuthor: mark.f » Mon Mar 11, 2013 4:06 pm

Looks good. That definitely worked better than my attempt to fit stuff through 3" caps using a hole saw. :roll:
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Unread postAuthor: jakethebeast » Mon Mar 11, 2013 4:14 pm

I was goign to use a hole saw but then i remembered that the guy who does my welding has a wood lathe :D Much more "hi-tech" footage to show you guys, finally i'm making something with proper tools :wink:
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Unread postAuthor: Brian the brain » Mon Mar 11, 2013 4:31 pm

I'd use PVC more often if my brothers "Chappy"cannon hadn't blown up in my hands...

Looks good!

Today I found out that washervalves come in all shapes and sizes:
Image

Would have saved me the trouble of rerouting the outports..

Even 3-in-1 and more:

Image

makes me want to do an airsoft doublebarrel with grenadelauncher...
:D
Finally managed to cure a leak in the doublebarrel.
Numerous attempts at redesigning the poppetvalves ( at first) resulted in worn threads on one of the valve-lids.
I had taken it apart too many times to fiddle with springs and doing refinements on the pins, trying on different o-rings...etc.

I had noticed the material swelled when heated..so I just heated the threads with a lighter just enough to cause the threads to swell up a bit.
finally no more slow hiss.

Loading is all smooth now...I guess I could use a soda bottle with a small reg in a backpack and a remote line to keep it going for ever..
Only needs 2.5 bar to be more effective than any of my sons other Nerflaunchers..

I got my new spudgunchannel up on youtube so i'll be doing some vids soon.
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 12, 2013 4:27 am

Not bad for a wood lathe!
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Unread postAuthor: jakethebeast » Tue Mar 12, 2013 5:58 am

We had to sharpen the couges many times during the latheing :D Weren't mabe by me...

With sharp couges and right speed it was easy, i believe we used like 700rpm
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Unread postAuthor: SpudBlaster15 » Tue Mar 19, 2013 3:00 am

ITWOST, the TBMA is operational again for the first time in roughly a year. Guess I'll finally be making some new videos soon.
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Unread postAuthor: Zeus » Tue Mar 19, 2013 4:59 am

Good to have you back around, that project that DYI, yourself and I discussed at length is getting feasible, almost got a lathe and mill now, not even paying for it.
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Unread postAuthor: MrCrowley » Wed Mar 20, 2013 2:02 pm

SpudBlaster15 wrote:ITWOST, the TBMA is operational again for the first time in roughly a year. Guess I'll finally be making some new videos soon.
That's good to hear, had you taken it apart for fixing or something?

It's been 6 months since I last fired my hybrid and I'm long past the withdrawal symptoms. At least it makes it easier to focus on university stuff. Once I find another location to shoot at again, the addiction will surely come back :)
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Unread postAuthor: Labtecpower » Tue Mar 26, 2013 1:58 pm

My activities the last few days;

Image

Sanding, sanding, and more sanding :D

Also found some nice pneumatic cylinders at school;

Image

Image

Image

largest one has a diameter of +/- 12 cm :D
Thinking of making a hybrid out of them, in combination with the long one as a barrel hehe
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Unread postAuthor: Blitz » Fri Jul 26, 2013 5:16 pm

Hey, we need a bump here.

I estimated my upcoming project to have around 613lbs of recoil force from a 5lb projectile. :)
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