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spudgun range, are we falling short?

A place to ask general spud cannon related questions.
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Unread postAuthor: Bowman » Thu May 10, 2012 8:37 pm

Alright, well I was just trying to make things a little more simple. I mean don't get me wrong the stuff you guys are coming up with is absolutely ingenious it's just that sometimes simpler is better :D
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Unread postAuthor: MrCrowley » Fri May 11, 2012 4:45 pm

MrC, can you fit an AAA battery between the threaded rod and the body cavity? Probably not. Failing that, look at the list of button cell sizes - which is the biggest that fits?

I think you would struggle to get any of those button cell batteries in the body without removing the rod. The gap between the rod and inside of the body is about the size of the head of a Q-tip.

The threaded rod can be removed and replaced with epoxy if necessary.
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Unread postAuthor: jackssmirkingrevenge » Fri May 11, 2012 10:42 pm

What was the ID of the body again?
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Unread postAuthor: dewey-1 » Fri May 11, 2012 11:13 pm

12.7mm (.500 inch) ID

Didn't I send you CAD drawings for Miniboy?
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Unread postAuthor: MrCrowley » Fri May 11, 2012 11:19 pm

They need to make flexible circuit boards that can be rolled up slightly. If that were the case, I reckon we could fit a FM transmitter inside Miniboy.
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Unread postAuthor: jackssmirkingrevenge » Fri May 11, 2012 11:29 pm

dewey-1 wrote:Didn't I send you CAD drawings for Miniboy?


:oops:

Right you are!

If that were the case, I reckon we could fit a FM transmitter inside Miniboy.


I think that assembled "in the air" it can be made to fit, with a load of these to power it: http://www.all-battery.com/browseproduc ... -Card.HTML
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Unread postAuthor: dewey-1 » Sat May 12, 2012 1:48 pm

JSR;
I still think something like this is best to try at your location based on the circuit board/schematic I supplied. About a 12mm ID for projectile.
Also this could be fully encapsulated. This would be for a new projectile.
We will get you to learn electronics somehow. :)

http://www.ebay.com/itm/108dBm-single-C ... 3a7448ce1b

The receiver is slightly different.
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 9:46 am

I had keyfinder! more on that later...

I still think something like this is best to try at your location based on the circuit board/schematic I supplied.


Weren't you meant to give me a common man translation for it :D
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 1:29 pm

Some views of the beeper circuit, and the vague idea in my head of what to do with it. Range is about ten metres, even through a solid wall. Still, any ideas on extending the aerial (which is integrated in the circuit board)?

I wonder if orienting the beeper that way would damage it...
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Unread postAuthor: Petitlu » Tue May 15, 2012 2:07 pm

And tungsten, where it is? :D

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Unread postAuthor: POLAND_SPUD » Tue May 15, 2012 3:27 pm

some views of the beeper circuit
uhmm I don't get it is it just a beeper or does it use RF? If all you want is sound then you might as well buy a buzzer for like 2$ or so... since you're not limited as much as mrcrowley as far as diam. is concerned then you might as well get a really powerful one (>110db or so)
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 3:38 pm

uhmm I don't get it is it just a beeper or does it use RF? If all you want is sound then you might as well buy a buzzer for like 2$ or so... since you're not limited as much as mrcrowley as far as diam. is concerned then you might as well get a really powerful one (>110db or so)


Ah, but this one only beeps when you tell it to ;)

Petitlu wrote:And tungsten, where it is? :D


All over your garden, in small pieces :D

I attached a short length of wire to it and the range improved considerably...

Here's a keep-it-simple idea, the only disadvantage is that you can't change the battery...
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Unread postAuthor: Petitlu » Tue May 15, 2012 3:45 pm

batteries last a long time!
longer than the life of the projectile in my opinion ... :wink:
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Unread postAuthor: jackssmirkingrevenge » Tue May 15, 2012 4:03 pm

I can make the above with relative ease, and I have four beeper units.

We could do it in stages, first shot running it as a basic burst disk pneumatic, if that works progressively higher mixes :D
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Unread postAuthor: Petitlu » Tue May 15, 2012 4:38 pm

Yes it will go easy! :wink:
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