Mini Magnetic Reed Module Arduino Compatible (2 Pack)
Mini Magnetic Reed Module Arduino Compatible (2 Pack), Mini Magnetic Reed Module (Arduino-Compatible) (2 Pack)A reed contact switch is a normally open contact which closes in the presence of a magnetic field. This modules contains a 10K ohm pull-up resistor. These types of sensors are found in window and door alarm systems with magnetic proximity sensors.Specifications Voltage : 5 VDC Connection: 3 pins, +(middle pin), ground and DO (data out) Size: 0.98" x 0.59" (25 x 15 mm) Weight: 0.07 oz. (2 g)