Have you ever wanted to arrive home to a personal welcome? With a Raspberry Pi and a few simple components, you can! In this simple project we’ll use a reed switch to trigger a theme tune when a door is opened. We shall be using a Raspberry Pi as the controller here, though you could use almost any other microcontroller for this project using the same circuit. Here’s a demo. You Will Need You will likely already own all of the parts you need to make this except the reed switch, which is around $2–3, or you can get a packet...
Read the full article: Play Your Own Theme Tune When You Enter the Room With Raspberry Pi
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