Hidden wire detector

Posted on Feb 5, 2014

If you want to drill a hole in the wall then you must be sure that there`s no electrical wiring. This simple device. shown on the figure 1, can detect electrical wiring in the walls or ceiling. Resistor R1 protects IC CD4011 against electrostatic. A rigid copper piece of wire (~ 18 AWG, with length of 5. 15 cm) works as antenna. Sensitivity of the

Hidden wire detector
Click here to download the full size of the above Circuit.

circuit depends on the length of the antenna. When the antenna is placed near the electrical wiring, then the circuit produces a sound with 50 or 60 Hz frequency. This device can detect broken wires in cables - near the broken wire the sound is off. The piezoelectric speaker HA1 is connected to the bridge circuit to achieve higher loudness. On the figure 2 is shown more complicated circuit, except audio it has visual indication based on LED VD1. Resistance of the resistor R1 should be more than 50 Megohms.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Ready set goi
    active short wave antenna
    very useful timed beeper
    Experiments with flybacks
    Ionization smoke detector circuit using A5367
    Wideband DTV UHF Antenna TV Amplifier Circuit using transistor 2sc3358
    As of control rechargeable delay circuit
    Digital pulse width measurement circuit diagram CD4518 and CD4069 the