DIY Club

  ⚡ DIY Non-Contact AC Line Tester – Safely Detect Live Wires Working with AC power can be hazardous, especially when you’re uncertain if the wires are live or not. A Non-Contact AC Line Tester is a simple yet essential tool that helps you safely detect the presence of AC voltage in wires or electrical devices without making direct contact. In this DIY guide, we will show you how to build your own non-contact AC line tester. 📦 Materials Needed: LED (preferably a high-brightness LED) Resistor (e.g., 1MΩ, 10MΩ) Transistor (e.g., BC547 NPN transistor) Capacitor (e.g., 0.1µF for noise filtering) Inductive Pickup Coil (for detecting AC signal) Piezo buzzer (optional for sound indication) Battery (e.g., 9V battery) Wires and Soldering Kit Enclosure (for safety and portability) Insulated probes (for testing) ⚙️ Steps to Build: Step 1: Understanding the Circuit The core component of this tester is an inductive pickup coil . It detects the el...