DIY Polarity Tester positive negative finder
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- เผยแพร่เมื่อ 7 ก.พ. 2025
- DIY Polarity Tester / positive negative finder
Materials Required:
1. Old Bolt point Pen Transparent
2. 2mm copper wire
3. 3K Ohms resistor
4. Red & Green LED
5. Alligator Clip
6. Wires
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Thank you.
The video explains very well. The voltage test pen is still necessary. I bought a renhotecic brand test pen not long ago. The test is very convenient, accurate and safe. Family must.
8 лет назад собрал себе такую контрольку, только свечение делал красное при плюсе,а зеленое при минусе!
скажите пожалуйста, для теста с акума авто 12 вольт, килограмма резистора хватит? я просто не умею считать, не сгорит ли диод? я планирую до 5 кил резисторов набрать. Схема чуть другая, диоды будут запитаны на обе полярности ,что бы не менять туда-сюда клему крокодила, типа подключил раз и не лазишь больше к крокодилам. Спасибо
@@janerossi3022 давно дело было, завтра посмотрю, отпишусь.
Revisa cuál es la corriente máxima que puede entrar a tus leds, suponiendo que es 2 mA tu resistencia debería ser de 6k Ohm.
Thank you very much, I had to do a project for my school and your video worked very well for me.
Great job
great job my brother excellent
I think it would make more sense if when the clip is on the negative terminal and tip is to the positive terminal it shows Red, and when the clip is on the positive terminal and the tip is to the negative terminal it shows green...But just my opinion👍
Yes, you are very correct.
Right, I also thinking the same.
thanks for the reply. My question about the 3K resister i ment can you use one 3K resister instead of three separate 1K resisters. thanks
Good job sir keep it up
Nice Job I look forward to what else you make.
He used three 1K ohms 1/2watt resistor here, but i think you can replace it with 3k ohms 2watts resistor just to lessen space😁.
Very good instrument.
வணக்கம்
Good idea for you.
But you can simply use dole polarity led for this idea.
Good work brother
,,
Jaffna, sri Lanka
Thanks for your circuit Anna. Great idea.
Can you please upgrade this circuit to check an AC supply polarity.
Thank you.
Ac hasnt polarity .
Nice 👍🏻👍🏻 🇮🇳 || Kuki
In the video the leds is soldered minus to minus. Is that right? I think it's opposite?
great video please could you explain joining the led's is it positive to negative
or positive to positive and could you use a 3 k omh resister to save space
thanks kind regards j.jones.
It should be positive to negative...
Forward BIAS condition of a diode will be satisfied... Hope I am correct.. Thanks for the video.
ac line and neutral use this tester pls tell me
Hola buen video, este me puede servir para detectar voltajes de 110 a 120 vols o solo para voltajes pequeños
the legs of the bulb? is it both negative positive pairing?
Si inviertes la polaridad para que encienda el rojo cuando la punta del tester toque el positivo sería perfecto para uso automotriz
Very nice 👍
very good need more of your ideas for mylab thanks
hay que invertor los polos de los led ya que ++ - - no punciona
Very Good Pen Test.
Molto bello questo video creativo e ben curato bravo
Nice project 👍👍
Yes, thanks for the valuable efforts towards us.
வணக்கம் சார்
உங்கள் வீடியோ காட்சிகள் மிக அருமை.
இதே போல் எனக்கு tester
செய்து கொடுக்கவும் சார்.
இதற்கு வுண்டான தொகை
( பணத்தை) தாங்களுக்கு
அனுப்பி விடுகிறேன்.
Pls sir .
Is this work both AC and DC ?
According to ohms law the resistors are in series=+ you add 1+1+1=3k ohms
It works with 12 volts???
En el minuto 4.30, porqué soldó otro alambre en la punta si ya había soldado uno anteriormente?
Es lo que tambien me parecio entender.
The tester is used only for battery?
what is the voltage range of this tester? can this be used for automotive?
Very Nice, Thank you 💐👍
Nice video
Bhai ap ne to koi cell ya battery b nahi dali.
Phir ye kesay ?????
Is it possible to make tester for conductor testing , like checking continuity of bunch conductor
Lahis Tech.
1) I have a high power supply that can go up to 35000 volt. How do I test to see
if the unit to put out positive polarity voltage or negative polarity voltage ?
2) What is the difference between a high power supply that put out positive polarity voltage and negative polarity voltage ?
Nice idea
Nice video and easy to follow. No language barrier in this video.
But what I really want to know is how you got that piece of solid copper wire that was soldiered to the LED to change into a piece of insulated multi strand copper wire. You sir are a wizard!
th-cam.com/video/Bsp0sTDFRbc/w-d-xo.html
that catched my attention when i was watching too, lol
@@misugijun , Igualmente.
very interesting video.. good job sir thanks for shAring this video
Sir ji aap prodect hai to bahut Ashaa par jo aap nay L E D ko LED kay sath soldering ke hai wo to samaj nahi aaii LED KO KEHSE KANEKSHAN KARNA HAI PLUS KO PLUS KAY SATH KARNA HAI YA PLUS KO MINES KAY SATH CANEKSHAN DENA HAI YEH BATAO JI THANKS JI 🙏
smart idea ... Love it and gona make it
هل يمكن تشغيل القلم مع تيار كهربائي 220v فولط ؟؟؟ 🤔🤔
Boss ask ko lang kung pwede yan pang test sa motor KO?
I liked your video, I wonder, way you didn't use one 3kΩ instead of 3 resistors, is there wattage or heat dissipation reasons? 👍🤔
Availability issue, as I think.
Muy bueno
Many other videos just use 1x 1K resistor, why in this video we need 3x 1K resistor?
Maybe someone can explain, please?
Wao amazing 😘😘😘
Super 💖
क्या बात है यार क्या दिमाग लगाए हो,😂
no explico que los polos de los led hay que soldarlos de forma invertida.
PLEASE REPLY!, I REALLY NEED YOUR HELP!. I bought a class d tpa3110 amplifier 2x30w, and it seems that the markings on the speaker
output, 1 channel is out of phase but I don't know which channel is in correct phase if it is the right or left channel. Will this invention find the right polarity of the output of my amp? Thank you in advance!.
Very good
Nice video..
VERY GOOD IDEA
احسنت العمل ... لكن الاقطاب معكوسة .. 👏🏻👏🏻👏🏻
Ur good but something is not right ..red must be positive not green light..
The circuit diagram is missing. - Falta el diagrama del circuito. (19 . III . 2023).
Very good.
Than you Very good idea would you help me by circuit diagram .
Amazing Bro stay Away Ameen
Does anyone know the type and model number of that pen and where to buy from cheap online? I live here in Cyrus and I have never seen any transparent ballpoint pen with that much inner diameter to fit a small led inside. Could someone provide a link to an online store pointing to the item in question to buy it online? This is a must-make DIY project and a must-have tool in your kitchen's handy tools drawer.
Very good thanks
does it make a difference in function if you use a 1mm wire instead of a 2mm wire?
Great Clips btw
Muito bom, fiz um teste de polarização com resistor de 3 kohms nota 10.
Very nice project, did you file the iron tip or it had pointed tip since you purchased it?
led your seri or paralel
Can we check 220v dc also?
See, the leds must withstand the 220dc.
Nice video. Can I use that in 12 volt car battery?
3k resistor absolutely can handle 12volt battery
Thanks so much more fun and amazing
th-cam.com/video/Bsp0sTDFRbc/w-d-xo.html
Can you make one for AC?
Unless it can detect polarity of SMD components. That job can be done by a multimeter
Good idea
Hasta cuántos vol se puede medir?
PODERIA COLOCAR UM RESISTOR DE 2K7, OU UM DE 3K2; ASSIM NÃO PRECISARIA DE TANTOS RESISTORES...SERIA INTERESSANTE TAMBÉM USAR LED'S DE 3 mm.
هل يمكن تشغيل القلم مع تيار كهربائي 220v فولط ؟؟؟ 🤔🤔
Thanks sir very good work I like your nice thyou 🌴 Javed Iqbal from Sialkot City Hall 🇵🇰🇺🇲
what color is the positive and negative?
Red as positive
❤❤❤
Please I need explanation of this project.
Music name please tell me 🙏🙏🙏
Very simple and practical
th-cam.com/video/Bsp0sTDFRbc/w-d-xo.html
Do you make testers for AC?..If you do please share some ideas. Thanks!
There is no polarity on AC, so nothing to test… 😉
1.5 KILO OHM KA 2 RESISTANCE USE KARE SAKTE.
Awesome
baterie voltage ??????
Amazing
Same yahi main bnaya hy 😁😁
Min wesy tester min bnaya tha
Good job
Thanks shifu
3k resistance could be use
Good work, thank you for sharing congratulations.
Super
Solo hay que cambiar el alicate de cortar😀.
De mas👍👍
Please make a A. C. tester
Hey Man you deserve a like, but kindly reply to the comments.
ดุหนังใป้ไทย
th-cam.com/video/Bsp0sTDFRbc/w-d-xo.html
Sir plies, ckt ka video banna
love
Superb
Cuanto es el voltaje que aguanta