Detecting Driver Drowsiness Based Force Sensitive Resistors.
The Force Sensitive Resistor, or FSR is one of those parts that fills bins in interaction design labs across the world. It’s a simple guy, a finicky guy, but it has its place in the maker toolbox. A FSR is just what it sounds like – a resistor that changes its resistance with force. So if you press, sit, or punch it, its resistance changes. The finicky part tends to be when people want it to measure force with any sort of precision. It’s really not good for that, so if you need something sense even approximate weight or quantitative force, this is not your guy. But if you need something that will let you know if someone is sitting in a chair, or hugging a stuffed animal, this is it! FSRs come in a wide variety of sizes, the larges ones can get a bit expensive, but you can probably find one to fit your project . Hooking it up, and why The FSR changes its resistance with force. It ranges from near infinite when not being touched, to under 300ohms when pressed really hard. S