So I have done a bunch of googling on the subject but want to get some input / direction from the forum. I want to build a device that I can place on a punching bag and measure and differentiate the force of someone punching or hitting it. Before you post a link to the Cassius project, I have read all about it and it seems pretty good but I have questions.
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Has anyone built the FSR that the cassius project outlines and do they only measure a "hit" or can they differentiate between the power behind that hit. Example: If I tap the FSR does it give me a 10 and if I do a full punch it give me a 100? I don't care about real world accuracy, mostly just differentiation.
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I ok with building my own FSR but I would like to start with something off the shelf so I can take one component out of the equation. Has anyone used the FSR from sparkfun? Like this one: Force Sensitive Resistor - Square - SEN-09376 - SparkFun Electronics. I have read some FSR break down quickly and don't like bending.
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Are FSRs even used to measure this kind of impact force or just touch / step on/off forces? Am I just barking up the wrong tree with my approach? I have seen projects with accelerometers but I want something on the surface.
Thanks for the input.