The SW-520D is a ball-type tilt and vibration switch, not a mercury switch. A conductive ball moves inside and opens or closes the contact with…
The FSR402 is a force-sensitive resistor whose resistance changes with load. It does not directly measure pressure unless contact area is known, and its…
Before reaching for an I2C sensor like the MAX30100, the classic analog Pulse Sensor is a simpler, cheaper starting point for reading heart rate — a…
The MAX30100 combines red and infrared emitters with a photodetector for experiments with pulse and oxygen-saturation algorithms. The part is obsolete…