Using this Blue Mini Illuminated Momentary Pushbutton is easy. First, snap it into your breadboard as it's about the same size as 6mm tactile switches. To light up the built - in LED, you'll need to add your own ~1K resistor. You can control the LED using a microcontroller pin or another method you prefer. Keep in mind that this is a momentary button, so it won't stay on like an on - off switch. When it comes to maintenance, there's not much to do. Just make sure the pins are clean and not bent. If you notice the LED isn't working, double - check your resistor and connections. And that's it! Enjoy using this cute pushbutton in your projects.