arkoma
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DIY Balance
a balance is such an important piece of gear for a mad scientist, and some of us are "destitute" but that doesn't mean we need go without one, or that
it not be pretty damned accurate. This thing was clobbered up out of a 4" scraper blade, a couple of those "wonder wall hooks" scrap sticks, paper
clips and plastic drink bottles. ONE DROP of water sensitivity.
     
I use US coins and a syringe of cold water as my weight set. 1 cm3 is one gram, and a u100 insulin syringe breaks that into 100 parts 
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smaerd
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I have to say this is one of the most ghetto but functional designs I have seen on this forum. Dig your style! Probably works just fine for a lot of
applications. Looks like you use spare change as a counter balance? My only suggestion would be to get some better weigh boats hehehe.
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arkoma
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The beam is 45 inches long, balanced on a razors edge. Pretty damned accurate and repeatable. Yes, i use coins. A current US cent weighs 2.5 gm,
and water, well, 1 gm per cubic centimeter "at temp of melting ice". Sensitive enough I have to close the laundry room doors to get it to stabilize.
(EDIT) Total cost ZERO dollars
(EDIT) Galileo and Faraday used "ghetto"equipment too, by today's standards
[Edited on 5-31-2014 by arkoma]
[Edited on 5-31-2014 by arkoma]
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aga
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Simply Brilliant !
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smaerd
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Hey I wasn't knocking it, it's actually pretty awesome. I've seen people build microgram balances with a very similar design - http://sci-toys.com/scitoys/scitoys/mathematics/microgram_ba...
More rugged then the cheapy electronic balances too.
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arkoma
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@smaerd--I didn't take it as a knock
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aga
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| Quote: | | ONE DROP of water sensitivity |
I just measured One Drop of water from a pipette on my whizzy 0.01g electronic scales.
0.04g
You're now Officially a genius !
EDIT: 2 drops came to 9g so it's 0.045g
[Edited on 31-5-2014 by aga]
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arkoma
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I prefer the term "Clinically Insane" LOL
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aga
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The only differnce between Crazy, Insane and Eccentric comes down to :-
a) whether you're Right or not
b) how much money you have
Each term always means 'extraordinary' and able to think differently, as you clearly have !
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aga
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I think this needs to be in a new Class entirely : Guerrilla Chemistry.
[Edited on 10-6-2014 by aga]
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