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Interesting. I didn't even know these existed. I would still prefer something with limitless on-demand air supply but this could be worth trying if there's a reasonable way to switch the supply on and off with an Arduino.
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Just don't throw your birthday balloons away.
I wanna be a eunuchs developer! Pass me a bread knife!
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How about your local MP/Congresscritter? 
I see only three problems:
- They tend to leak
- Turning them off is a bit of a problem
- You can't control them from an Arduino
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
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Back in my country, roadside cycle shops use old refrigerator compressors to inflate tires. They're fairly quiet but the flow rate may not be enough for your purpose
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Buying a small child from a third-world country not an option? 
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I can't find anything about how to actuate a child with an Arduino.
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<Reply type="Obligatory" style="crude:medium;color:off;">
- just change your diet to one containing more beans and cabbage.
- purchase a pet and affix it to it's distal vent, feed diet from previous suggestion
</Reply>
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Limitless supply of hot air...hmm. Sounds like you just need a politician! 
..on a more serious note, how about steam?
"Go forth into the source" - Neal Morse
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Mick's CPAP comment gave me an idea. Air bed inflater. I have a 12v one, but they do come in mains versions.
Cheers,
Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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Make it more visually fun.
Small compressor motor that blows up a balloon. The balloon is attached to a tee with a check valve on the compressor side and an electrically activated valve on the whistle side. Compressor blows up the balloon when needed, and the balloon blows the slide whistle when you actuate the valve.
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yay! it works again. Was getting the error "there was an issue looking up your account"  about an hour ago and before I make the initial post. 
Bryian Tan
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never noticed, only use for a hotmail account is for annoying 'sign-up to download' sites anyway.
Sin tack
the any key okay
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It was probably automatically updating.
I wanna be a eunuchs developer! Pass me a bread knife!
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I'M OLD
There are seven houses,
In each house there are seven cats,
Each cat catches seven mice,
Each mouse would have eaten seven ears of corn,
If sown, each ear of corn would have produced seven heqat of grain.
How many things are mentioned altogether?
(They made me sick with all those new things today, so before you the oldest known - written - puzzle, form Egypt)
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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Is it just a sum or am I missing something tricky?
19607
7 H
49 C
343 M
2401 E
16807 H
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Were they all going to St Ives[^]? 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I try not to involve wives in my posts
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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Good plan - and not only for posts.
Cheers,
Mick
------------------------------------------------
It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.
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Dunno. What's a heqat?
(If I google it, I'll probably get the puzzle - it's reasonably famous)
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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It is extremely famous...
And heqat is a unit used to measure - grain too - in ancient Egypt... It is a kind of bowl of about 4.8 liter...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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There are seven houses,
In each house there are seven cats,
Each cat catches seven mice,
Each mouse would have eaten seven ears of corn,
If sown, each ear of corn would have produced seven heqat of grain.
I had to lookup Hekat (unit) - Wikipedia[^].
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Five "things" are mentioned: Houses, Cats, Mice, Ears of Corn, Grain. (Multiple instances of each "thing" of course).
OR
7(H) + 49(C) + 2401(E) + 16807(G) = 19264. The 343 mice don't exist any more, having been eaten by the cats. Because the cats exist, the mice don't (and are therefore only "imaginary" or "remembered" things), so the ears of corn and their grain do exist. Although, the wording implies that the corn has not been sown, hence the grain doesn't exist; so maybe 7(H) + 49(C) + 2401(E) = 2457.
OR the classical answer of 19607.
The problem has been inadequately specified.
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