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4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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V3 Coil Carbine

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Saz43
Mon May 20 2013, 06:21PM
Saz43 Registered Member #1525 Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
 		Keep up the nice work, Ben! I'm really happy to see someone else activley working on building a serious portable coilgun. I'm looking forward to seeing more photos.
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Maxwell
Tue Jun 11 2013, 05:23PM
Maxwell Registered Member #8497 Joined: Tue Dec 04 2012, 06:24PM
Location:
Posts: 74
 		Hi Ben5017,

Apologies for the untimely compilation of this code.
With summer being here - free time is always sparse.

Regardless, here is the working code as mentioned.
Like I've mentioned previously I've never worked with Servos - so this will have to be a next-revision implementation to the code.

[code]

-Maxwell.[br]]06-11- 2013_maxwell.txt[/file]
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Thomas W
Tue Jun 11 2013, 07:09PM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
ben5017 wrote ...

MAX: Sounds good. Here is a little more motivation. still got away to go .....

construction will be 5mm abs.

What is the most compact arduino you think I could get away with? I want to leave a little room for possible upgrades in the future.
1368653960 3315 FT147269 Iso

Link2

ive found these very good.
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Maxwell
Wed Jun 12 2013, 12:12PM
Maxwell Registered Member #8497 Joined: Tue Dec 04 2012, 06:24PM
Location:
Posts: 74
 		For what Ben is doing, more digial I/O's are needed.
He already has one arduino Mega?
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ben5017
Wed Jun 12 2013, 04:32PM
ben5017 Registered Member #3315 Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
 		MAX: How do I access the code? What is the most compact arduino I can get away with? (how many I/O's do I need) I cannot find an acceptable way to use the mega in my gun. Its just to big. I will be using it for testing purposes.
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Maxwell
Wed Jun 12 2013, 07:26PM
Maxwell Registered Member #8497 Joined: Tue Dec 04 2012, 06:24PM
Location:
Posts: 74
 		The link the forum edited is misleading, but try this:
Link2

You should be able to get away with the micro if you're okay with the custom pinning. I would do a bunch of bench-testing with the code.

My code is set to work with the Leonardo...However I'm using 12 digital I/O pins...so serial may not work properly.
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ben5017
Wed Jun 12 2013, 10:07PM
ben5017 Registered Member #3315 Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
 		max,

You are awsome. this will save me so much startup time, and be great to reverse engineer to learn how to program these things. I will now be ordering a leonardo as well, its smaller than my mega and should fit with my updated gun layout.
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Maxwell
Thu Jun 13 2013, 02:35AM
Maxwell Registered Member #8497 Joined: Tue Dec 04 2012, 06:24PM
Location:
Posts: 74
 		FYI - debugging has already started:

" fire(50,SGRgC);
stage=stage+photogate(ptgB)+100; //stage should now equal 102+1+100=303
delayMicroseconds(50); //delay between coils (in us)"

The second ptgB should really be ptgC to reflect SGRgC above.

likewise in the statement right below it for SGRgD.
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ben5017
Mon Jun 17 2013, 12:37AM
ben5017 Registered Member #3315 Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
 		UPDATE: Frame close to completion. Router will be up and running this week, hopefully..

MAX: Keep it coming. You have no idea how much i appreciate you putting in the time to help me. A complete stranger no less.
hopefully the new pics will keep you interested in my project.
2013

2
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ben5017
Wed Jul 10 2013, 11:14PM
ben5017 Registered Member #3315 Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
 		UPDATE: FRAME CUT AND 90% ASSEMBLED. SEE ATTACHED PICS OF THE FINAL CAD WORK, PICS OF THE REAL THING WILL FOLLOW SHORTLY ONCE I TAKE THEM!

TO DO LIST.
1) FINISH ATTACHING DRUM MAG
2) MAKE DRIVER AND SENSOR BOARDS
3) A LOT OF WIRING AND QUALITY SOLDERING TIME
4) AQUIRE PROGRAMMING SKILLS
5) PROFIT
1373498086 3315 FT147269 1

1373498087 3315 FT147269 2

1373498087 3315 FT147269 3

1373498087 3315 FT147269 4
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