MicroMaker Labs on Instagram: "🚨 Part 2 of our Makers Build series! We’re building an ADVANCED PROXIMITY RADAR using an HC-SR04 sensor. 💡 How it works: → Measures distance with ultrasonic waves → ZONE 1 (Far): BLUE light + low beep → ZONE 2 (Medium): GREEN light + medium beep → ZONE 3 (Near): RED light + high-pitch alarm! → The closer you get, the brighter the light and higher the sound! ⚡ Difficulty: Beginner-Intermediate ⏱️ Build Time: 20 minutes 🎯 Age: 12-18 years Want