Reed Switch Module | LM393 Sensor | For Arduino DIY Electronics Kits

This G123-08 module is a magnetic sensor. It has a reed switch and an LM393 chip. When a magnet is near, the LM393 gives a clear digital signal. This makes it good for Arduino projects and other DIY e...
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Questions about this product
- What kind of projects is this reed sensor module typically used for?
- It's a magnetic switch, so it's ideal for detecting when something is open or closed. Common uses include DIY window and door alarms, cabinet light switches, or as a non-contact limit switch on custom machinery.
- Can I connect this G123-08 module straight to an Arduino?
- Yes, it's designed to work directly with microcontrollers like an Arduino or Raspberry Pi. The board has a switching transducer output that provides a clean digital signal, making it simple to read on a digital input pin.
- What does the LM393 chip on the board actually do?
- The LM393 is a voltage comparator. It takes the simple on/off signal from the glass reed switch and turns it into a stable, clean digital output for your project. This helps prevent false readings from electrical noise or switch 'bounce'.
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