I am fat and I am being looking for a way helping controlling myself. In recent past I hacked 2 cheap bathroom scales for log my weight on SDCard, and I am being making a graph of time VS weight, me and my girlfriend, we are using it.
Now I found a cheap (20â‚¬) scale on local shop that also measure body fat, water and muscle :-) -- I started hacked it but is far from the end... and I though that maybe my energies would be better to invest on building a scale from the start, as an Open Source project.
I want to make simple and cheap as possible, DIY bathroom scale. It will need electronics + mechanical construction.
Mechanical may be difficult for me but now that I have a RepRap 3D printer, I can print plastic objects and use nuts and bolts in conjunction just like RepRap Mendel.
So I am looking for guidance on some cheap hardware/sensor for making the scale. Please help me start this project, because later I can/know how to use some cheap ARM + cheap LCD + SDCard.
I am looking to build something modular, for later try to add some kind of wireless and user be able to get the data on his mobile PC/android. Then some other hackers can develop application to show the graph in real time. Also other sensor as for body fat can be added to the system.
I had looking at google, there is none Open Hardware bathroom scale yet, and many hackers are fat :-) -- people like me needs a smart bathroom scale to help us getting better shape and health.
Thanks in advance.