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.
If you have enjoyed the video please hit the like button and share it with your friends. For more such videos don't forget to SUBSCRIBE our channel and please do share your feedback in comment sections. Thank you for your Support.
Find us on Facebook: / techstudycell
Other useful videos:
How to make 5 volt DC power supply from AC using 7805 regulator
• How to make 5 volt pow...
How to make Clap Switch & Music Rhythm LED Flashlight circuit without 555 Timer/Electronics Project
• How to make Clap Switc...
How to make Flashing LED Light for Bike using Transistor
• How to make Flashing L...
How to make Robot - Build a Mini Bug Robot at home in 5 minutes
• How to make Robot - Bu...
How to Design Arduino based Digital Tachometer on Breadboard
• How to Design Arduino ...
How to Test Capacitors with and without Multi-meter.
• How to Test Capacitors...
How to Test MOSFET transistor using Multimeter by some easy methods
• How to Test MOSFET tra...

[@rajdeepbarman7861]

Awsm!

[@kowshikhero8806]

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

[@kiranstech]

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👍👏😆

[@nkkasera]

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

[@TechStudyCell]

Yes.

[@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

[@--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?

[@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??

[@RajKhandwala]

Why the resistors? Purpose?

[@gjnewsinfo]

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.

[@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

[@Sree-jh2zo]

fool, Line Tester is enough