Hey everyone! I'm making a project on a magnetic door which makes an LED light glow when the door is brought close to the reed switch (the door contains a magnet) using an Arduino I bought a "Rees52, Magnetic Switch Reed Switch Sensor Module: DC 3.3V~5V For Photocopiers /Washing Machines / Refrige…

Need help with Reed Switch and it's functioning (What is DD in it?)

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