I'm working on a project for which I need a sphere, about 40-50mm diameter, which will be heavy enough to turn a turbine (100-200g +)...
I have researched RFID, accelerometers, near field communication, magnetic paint, Bluetooth and arduino in an attempt to find a solution for this...
Wireless Sports Technology
A wireless three-dimensional target is on the playing field. A player kicks a ball at the target.
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