I recently embarked on a DIY project that turned out to be both fun and incredibly useful! Inspired by the desire to enhance my home’s security without relying on traditional sensors, I decided to build my own motion sensor using readily available components. Here’s a quick rundown of my journey and the results.The project involved a radar sensor, a Shelly 1, and a simple power supply. The idea was to create a motion detection system that could work through walls and other obstructions, providing an added layer of security in areas that are typically hard to monitor. I stumbled upon this concept while researching alternative solutions to conventional motion detectors, and it immediately caught my interest.The setup was surprisingly straightforward. I connected the radar sensor to the Shelly 1, which acted as the intermediary between the sensor and my smart home system. The Shelly 1 was powered by a 12V adapter, and after a few adjustments, it was up and running. The most rewarding part was seeing the radar detect motion through walls, something I hadn’t expected to work so seamlessly.One challenge I encountered was ensuring the sensor’s sensitivity was just right. Too sensitive, and it would trigger unnecessarily; too insensitive, and it might miss actual movements. This required some trial and error, but with the adjustable settings on the radar, I was able to find the perfect balance.The best part? This project didn’t just add functionality—it also sparked a renewed interest in DIY electronics. It’s amazing how a little creativity and some basic components can lead to such a useful gadget. Plus, knowing that I built it myself gives me a sense of accomplishment that store-bought devices just can’t match.If you’re looking for a weekend project that’s both educational and practical, I highly recommend giving something like this a try. It’s a great way to dive into the world of smart home hacking while adding real value to your living space. Happy building! 