Magnetic Door Window Contact Reed Switch Arduino

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Magnetic door window contact reed switch arduino.

When the magnet is less than. 13 and gnd should be next to each other. Switch is closed in the presence of magnetic field and it is open in the absence of magnetic field. We are using a normally open reed switch in this project.

Normally the reed is open no connection between the two wires. Since the switch is non polar you can plug in the wires any way. The switch that we are going to use has two parts. Depending on the construction of the reed switch the contacts inside the switch can be either normally open or normally closed.

Connect the negative pin the shorter pin of the led to pin gnd ground of the arduino. How to use a magnetic door switch sensor with arduino. Reed switches can also be useful for other applications. A magnetic contact switch is basically a reed switch encased in a plastic shell so that you can easily apply them in a door a window or a drawer to detect if the door is open or closed.

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Vo is 5v when the switch is open and 0v when the switch is closed. Today we will make a simple device that will light up a led when a window is opened and if it is opened for 15 minutes it turns on a buzzer to remind you to close it. Connect the positive pin the longer lead of the led to pin 13 of the arduino. The other half is a magnet.

This shows you how to connect and window door security sensor to an arduino. The following image shows a simple reed switch with its internal connections. To interface reed switch with arduino we need to build a voltage divider circuit as shown in the figure below. In this tutorial we will use one magnetic contact door sw sensor and a buzzer for making a noise when a door is opened.

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