HIDDEN WIRE DETECTOR

INTRODUCTIONIf you need to find the wires inside your walls, you'll probably want a non-invasive way to look for them. After all, without a method to your madness, you'd just be hammering unsightly holes through your drywall in a vain attempt to cross paths with your wires. Instead, there's a better way: With the right tools and techniques, you can locate, ortrace, your wiring without damaging your walls.Tracing electrical wiring in walls can be tricky, and it involves more than just looking for the wires themselves. To figure out exactly where the wires are, you'll look for the outlets and appliances that each wire connects to. You'll also figure out which circuit breaker applies to which section of your home's wiring.APPLICATIONSYou may be wondering why someone would go through all that trouble just to figure out the locations of wires. Knowing where your wires are can (1) help you make repairs, plan for home improvement projects and even make your home safer. (2)By knowing which outlets are on which circuits, you can decide where to plug in power-hungry appliances without overloading your electrical system. (3)If one of your outlets is on the fritz and you don't have an electrical blueprint of your home to use as a reference, tracing the wiring can help you figure out exactly where the problem is.(4) If you want to run new wires to a home theater system or other electronics, knowing your current wires' locations can help cut down on electrical interference, which can lower the quality of your picture and sound. (5)And you'll definitely need to know where the wires are if you plan to do any renovation or demolition projects to your inside walls. Breaking into a live wire could damage your home and cause serious injury.CIRCUIT DIAGRAM

WORKINGIf you want to drill a hole in the wall then you must be sure that there's no electrical wiring. This simple device, a hidden wire detector, can detect electrical wiring in the walls or ceiling. A rigid copper piece of wire works as antenna. When the antenna is placed near the electrical wiring, then the circuit produces a sound with 50 Hz. This device can detect broken wires in cables-near the broken wire the sound is off. The Buzzer is connected to the bridge circuit to achieve higher loudness. The electrical signal receiver consists of a IC comprising 4 NAND Gates, out of which two are used in the model. The first NAND Gate detects the signal radiated by the mains, and a output at the last NAND Gate is given, which is a square wave of frequency 50 Hz. LED VD1 doesn't have a resistor in series with it, because IC CD4011 can limit the current. Resistance of the resistor R1 should be more than 50 Megohms.