Magnetic Door Switch Current Sensor Optical (Infrared) Motor Encoder Module

Optical (Infrared) Motor Encoder Module  uses LM393 Speed sensor with Arduino

Often used for train/bus passes

The hall effect 3144 is a digital output hall sensor

Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes

Magnetic Door Switch Current Sensor Optical (Infrared) Motor Encoder ModuleIntroduction : With Magnetic Door Switch it is possible to monitor unauthorized opening of doors as well as side panels. Magnetic Door Switch comprises two parts the magnet and a magnetically sensitive switch. When the door is closed the two pieces should be in close contact of each other. When the door opens this distance increases, Depending on your setup and what mode your system is in, this could be a discreet text, a chime alert, or a full blown