Balance with Arduino

Hey all. I’m trying to make a scale that sends the data via WiFi online, having on the website other functionalities. I’m using a Yun for that.

I’ m trying to follow this project: http://www.open-electronics.org/wi-fi-body-scale-with-arduino/

I can’t find the same scale online, does the actual scales use 4 load cells with Wheatstone bridge? Could you recommend me some scales on Amazon which are like the one above mentioned?

I found that?

The project talks about microswitch, is this needed? Can i use trimmers?

Thank you in advance,

Neoal

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Italian setion: Collegare bilancia ad Arduino - Hardware - Arduino Forum