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Component used to measure weight?

Fit

Aug 16, 2016
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Hello I am planning on constructing a circuit which contains the ability to calculate weight based upon how many objects are in a box. I do not know which electronic components would be needed. Any help is appreciated. I r noob.
 

Alec_t

Jul 7, 2015
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Welcome to EP!
How do the objects arrive in the box? By conveyor, hand-delivered, ....?
Roughly how big/heavy are the objects?
Are all the objects the same weight?
What measurement accuracy is needed?
Couldn't you just use an off-the-shelf electronic scales?
 
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Fit

Aug 16, 2016
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Thanks!
The objects would be hand delivered into a spring loaded box i.e magazine
the rounds would all weigh the same roughly 115gr or 124gr.
It would basically be to calculate the round count of mag.
So as each is fired it would need to recalculate.

As per off shelf scales, the scale would need to be tiny in order to attach to the magazine.
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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You would be unlikely to build anything smaller than a small commercial scale.

What you are probably looking for is a strain gauge. The electronics to convert the small signal to a voltage are not trivial.
 
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Fit

Aug 16, 2016
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Thank you that sounds like a very useful component for the task required.
So you're saying that setting it up to work is not possible for a novice aye?
Who's looking to team up with the proper electronic skill set?
We'll split the profit 50/50.
Further details released upon secrecy agreement between mutual partners.
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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sorry, what you want is a load cell (which is a form of strain gauge designed for measuring weight,

ebay have them
 
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Alec_t

Jul 7, 2015
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There are safety implications here, so absolute reliability of the measurements would be essential. A mis-count could result in injury/death if the firer assumed the magazine was empty when in fact it wasn't.
 
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Fit

Aug 16, 2016
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Valid point. :)
Makes it a bit more interesting I reckon... better get it right or KABOOM!
for testing purposes I will make note to use blue training rounds.
Also I plan to not have any electronics touching live rounds.
 
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