SparkFun Hall Effect Sensor - US1881 Magneto Portable Power Banks This is a force sensitive

This is a force sensitive resistor with a round

(1)Red Condenser Microphone with build-in Metal Pop Filter:

It has a high sensitivity and fast response time

02"/11x26mm

SparkFun Hall Effect Sensor - US1881 Magneto Portable Power Banks This is a force sensitiveThe US1881 is an integrated Hall effect latched sensor. Thats nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch. The device includes an on chip Hall voltage generator for magnetic sensing, a