DIY Contactless Voltage Detector using BC547 Transistors

    Today we bring you an experiment based on the RC Oscillation Detection circuit. Would you like to know if there is an AC Voltage across a wire in your home? You can do this using a contactless voltage detector. So, the design needs very few components and only 3 transistors. It is very portable and power consumption is also very low.

    Let’s get started with the design.

    Perform this experiment under adult supervision if you are under 16.

    Components Required:

    1. BC547 – 3 Pieces
    2. LED – 1 Piece
    3. 220 Ohm Resistor – 1 Piece
    4. Buzzer
    5. 22AWG Copper Wire
    6. 9V Battery with Connector

    Watch the Video to Build A Contactless Voltage Detector

    Steps to Follow

    1. Connect all the Collectors of the 3 BC547 Transistors together. 
    2. Connect the Emitters of each BC547 transistor to the base of the other. This configuration is also known as Darlington Transistor Array.
    3. Connect the positive of the Buzzer to VCC. Connect the negative of the buzzer to Collector.
    4. Make the antennae from a single core wire with approximately 5-10 Turns. If your supply voltage is 120-160V, you require 8 turns.
    5. Connect the 9V Battery with Power Socket. The Emitter is connected to the negative and the positive of Buzzer will be connected to the VCC.

    Now if you’re wondering how to use a voltage detector, simply bring the antennae near a live electric supply. The buzzer shall ring if the device wiring was done properly.

    We hope you enjoyed building this non-contact voltage detector using BC547 transistors.



     

    RELATED ARTICLES

    Quitting Sugar

    The Impact on Your Body after Quitting Sugar Intake

    Our contemporary diets are heavily reliant on sugar. It is present in everything, including processed...
    Foods to Avoid After Workout

    8 Foods to Avoid After Your Workout

    Today, we'll look at nine things that you should never eat right after working out...
    financial freedom

    8 Key Goals to Achieve for Financial Freedom

    A goal that many people have is to become financially independent. It is the freedom...
    statue of liberty

    What’s Inside the Statue of Liberty?

    The Statue of Liberty, which towers over New York Harbour, is more than just a...
    Apple macbook air review

    Apple’s M2 MacBook Air – A Review

    Read our in-depth review to find out more about the sleek and powerful Apple M2...
    google pixel 7a reviews

    Google Pixel 7a Review

    Today, we're going to examine a tool that is powerful without being expensive. Welcome to...
    Mero share

    Mero Share: Everything You Wanted to Know about It

    If you have kept track of Nepal's stock market, you must have seen that it...
    thesparkshop.inproductearbuds-for-gaming-low-latency-gaming-wireless-bluetooth-earbuds

    thesparkshop.in:product/earbuds-for-gaming-low-latency-gaming-wireless-bluetooth-earbuds: Learn More

    In the world of gaming, every millisecond counts. Whether in the thick of war or...
    sdmoviespoint2

    Binge-Worthy SDMoviesPoint2: Paradise for Movie Maniacs

    One website that provides free downloads of films and TV series in various languages and categories...
    Vegamovies in

    Tips and Tricks for Safe Viewing Movies On Vegamovies In

    Movie buffs are familiar with torrent websites that stream entertaining content, such as movies and...
    Igor Yusufov

    Igor Yusufov: The Minister and Reformer Who Found Ways to Cope with Large-Scale Challenges

    Igor Yusufov convinced the government and businesses to allocate substantial funds to his homeland’s energy...