Non contact AC Line and Neutral Detector / Non Contact Voltage Tester DIY

In this video, I have shown how to make a simple non-contact AC voltage detector on a breadboard which can easily detect live and neutral wire.
As this is a wireless AC tester so no part is connected with the AC line so it is very safe to use.
Components required for the noncontact tester:
1. BC547 NPN Transistor [3 nos]
2. Resistors [ 1M, 100K, 220ohm]
3. LED [1 no]
4. 9 volt Battery with connector
5. copper wire or strip [Alluminium Foil can also be used instead]
9. Breadboard
This is a very useful electronics DIY project as we all need an AC tester to detect live and neutral wire in the home.
I have also explained how this Wireless AC voltage tester works so that you can modify the circuit according to your requirement.
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[@kowshikhero8806]

Bro can we change any one value of transistor???

[@fuelforfear]

If i want to add a buzzer do I put it in series with the LED and change the resistor OR do I need another Transistor and go paralel. Can you help

[@smellysam]

Is it possible to increase detection range to 6cm on 240V wire by modifying the antenna? This is to trace a live wire that has been plastered over.

[@kowshikhero8806]

What will if I change One of the transistor's value in circuit can explain??

[@rajdeepbarman7861]

Awsm!

[@kiranstechhobbies8993]

Well done😊👏👏

[@TechStudyCell]

Thanks

[@kowshikhero8806]

I made this device but in my device's led glow very dim when kept nearer to the ac containing wire... I dont know why?? Can you explain what is the problem in device? And how to correct that mistake???

[@ADVANCEthinking]

Hey connect a metal plate to the antenna📡 and it will work excellent👍👏😆

[@RajKhandwala]

Why the resistors? Purpose?

[@nkkasera]

It really works I have also made
Can we use buzzer out of led

[@TechStudyCell]

Yes.

[@--12817]

Hello, great video. Is there any way you can test voltage?

[@TechStudyCell]

We can not measure the voltage with this. Only live wire can be identified.

[@--12817]

Tech StudyCell thanks for reply. how would you test for presence of voltage?

[@anirbanmajumder2035]

Vai mana is project ko banaya lakin a diveice on karta hi led thora thora glow kar raha ha kiyu.

[@pspupcoming5225]

Due to contact of wires

[@girish4249]

I made this same project but it shows led glowing even it is brought near any wire without current. Why?

[@TechStudyCell]

Please check for any loose connection or wrong polarity.

[@rukhsarbankapur7295]

Same problem

[@bjl1000]

Funny how there is ten circuits on this. Everybody claiming it's their idea.

[@Sree-jh2zo]

fool, Line Tester is enough