Make This SMART Gadget With Just 6 Parts! Non contact voltage detector.
ฝัง
- เผยแพร่เมื่อ 11 ก.พ. 2025
- diy non contact voltage tester using 6 electronic components,
perfect project for beginners.
All parts are explained in video also schematic is included.
![บังเอิญมันได้อ่ะ - แอน อรดี [OFFICIAL MV]](http://i.ytimg.com/vi/9fwjammKY4A/mqdefault.jpg)
Thx for watching and sharing this project with your friends.
Brilliant. Great resource for future generations.
That is my point sharing basic electronic stuff
It isn't detecting voltage. It's detecting the magnetic field generated by the current flowing through the wire. There's voltage present even when there is no current. It's a current detector, not a voltage detector.
That is true,detect magnetic field
[Warning = Noob questions...] It seems to me that we might be more interested in knowing that there is the presence of voltage, as opposed to current, because voltage can turn into current, as it is using a human's body to complete the circuit to ground. So, is there any such thing as a true voltage proximity tester? Maybe a circuit with a similar gain configuration (Darlington,) but using small MOSFETs (Example: 2N7000,) because MOSFETs are voltage driven devices? Aren't Op Amps inputs also voltage driven; yes, I think so. They are easy to set up for gain, of course. Maybe an op amp, or two, driving a 2N7000/2N3904/2N2222A for the LED. It seems that a MOSFET might be better suited as the switch for the LED and for extended battery life. Hmm... I have an Instrument Amplifier circuit already set up on a breadboard. It is a typical three op amp design, with x1000 gain. I wonder if it might be used, somehow... Thank you, in advance, for your help.
If that is a straight standard USB cable (as opposed to some fancy one) then since it has nothing at the end of it then their should not be any current.
Nice project, and could be a life-saver if you're drilling into walls, ceilings, floors and don't know where the AC cables are running - commercial units are plentiful of course, but a simple DIY is always preferred!
A couple of (dumb?) questions:
(1) could the detection strength be boosted? say with a more powerful battery, or with more coils in the antenna?
(2) does the LED glow proportionally to the current/distance? in the demo, it looks just on/off, but it could be due to the bright room.
This is really interesting - love your videos. Not a criticism but if you wanted to make it even better could you perhaps explain a bit about how it works? Thank you.
Any live AC wire with current flowing through it produces a small electro-magnetic field. The little antenna picks up enough of this field for the Darlington array that the transmitters form to multiply this tiny field. An NPN transistor has a current gain of approx 80x, so two transmitters give 80 x 80 gain, producing enough current to allow the battery voltage to flow into the gate of the last transmitter, which allows the LED, (placed between the battery and drain of the final transmitter) to light up
@@Tsnafu cool thank you 😀
Very well explained,thank you sir
Awesome little project, dude! Nicely done! 😃
Stay safe there with your family! 🖖😊
Thank you,stay safe you too!
Fun project. Thank you for sharing. Question = 9 volt batteries are big and expensive. The schematic looked like maybe 3 volts was usable? What voltages and battery types can be used? Tip = Maybe cover the antenna wire with some heat shrink, to improve its insulation. The wire's thin, enamel coating will wear off fairly easily, making it conductive.
I like these simple and very cheap detectors, but they are missing important sensitivity adjustment. Great video, thumbs up.
Yes, thanks
What changes need to be made to the circuit, to add this functionality? Please be very specific. Example = Add a trimmer? Where? As a variable resistor, or as a voltage divider? Etc. Thanks!!!
Looks pretty handy!!!
Thank you for sharing, great and useful project.
❤❤❤ xin chào
You are welcome!
👋
Very simple and useful, I like it!
Glad you like it!
thanks al lot my friend!
You are welcome!
Berry nice and useful project 👍👍
Thank you very much
Photon-pixel coupling: A method for parallel acquisition of electrical signals in scientific investigations
why is it turning on at 4:50?
Nice!
Thanks!
👍
Thx friend
❤❤❤❤❤❤ kính chào thầy giáo
I am not a teacher😔 just a man who love electronics and share the knowledge
@@Hacktuber 💋❤️
phone signal detector could be fun
At the end, when he shows the "tester", the led lights on without testing anything !!!??? 🤔
USB has DC, hasn’t it? Although it’s working?
Darlington configuration
Yes that is true
Hacktuber use computer mouse red led they are very bright
Thx for tip👍
Hi. You said you are going to wind a couple of loops. A couple = 2 (in your case 2 loops). I know english is not your native language, so I'm not judging!
To be fair, even native British English speakers don’t always literally mean two when we say couple... Although it’s uncommon for couple to mean more than six. For six we may say half a dozen!
Thx for support sir
You can wind as I show in video,8-10 turns