FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This sensor is an Alpha MF01A-N-221-A01 with 1/2 diameter sensing region. https://elecena.pl/product/17497710/round-force-sensitive-resistor-fsr-0-3-10-newton-force 2021-04-06 https://elecena.pl/product/17497710/round-force-sensitive-resistor-fsr-0-3-10-newton-force 2023-08-16