DIY Polarity Tester positive negative finder

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
Subscribe LahisTech: bit.ly/2JHtlyc
Subscribe for more future creative project videos.
Thank you.

[@sandywoolf2883]

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.

[@elektro_hirurg_2792]

8 лет назад собрал себе такую контрольку, только свечение делал красное при плюсе,а зеленое при минусе!

[@janerossi3022]

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

[@elektro_hirurg_2792]

@@janerossi3022 давно дело было, завтра посмотрю, отпишусь.

[@BrunoMarron-qi4uo]

Revisa cuál es la corriente máxima que puede entrar a tus leds, suponiendo que es 2 mA tu resistencia debería ser de 6k Ohm.

[@ikercortes]

Thank you very much, I had to do a project for my school and your video worked very well for me.

[@DIYTechTrends]

Great job

[@argenisruizpuac3094]

great job my brother excellent

[@ronjohnson2693]

Nice Job I look forward to what else you make.

[@simonilett998]

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👍

[@vijayannair5932]

Yes, you are very correct.

[@shaikhamiruddin5848]

Right, I also thinking the same.

[@anilpatel1398]

Very good instrument.

[@sharukhmatekuki5830]

Nice 👍🏻👍🏻 🇮🇳 || Kuki

[@JasonChullet]

Good job sir keep it up

[@josemayor7333]

Si inviertes la polaridad para que encienda el rojo cuando la punta del tester toque el positivo sería perfecto para uso automotriz

[@urla.tejaswitaruneee2483]

Thanks for your circuit Anna. Great idea. Can you please upgrade this circuit to check an AC supply polarity. Thank you.

[@saouga53]

Ac hasnt polarity .

[@seanporseur0918]

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😁.

[@eslobodan3]

hay que invertor los polos de los led ya que ++ - - no punciona

[@macmusic12]

I liked your video, I wonder, way you didn't use one 3kΩ instead of 3 resistors, is there wattage or heat dissipation reasons? 👍🤔

[@gautamcreations235]

Availability issue, as I think.

[@javierpeluffo7304]

Muy bueno

[@oussamachahid7672]

Yes, thanks for the valuable efforts towards us.

[@sooriyajeyasooriyan7094]

வணக்கம் Good idea for you. But you can simply use dole polarity led for this idea. Good work brother ,, Jaffna, sri Lanka

[@eberhardmuller637]

very good need more of your ideas for mylab thanks

[@cosimoparisi622]

Molto bello questo video creativo e ben curato bravo

[@555irfanshaikh]

ac line and neutral use this tester pls tell me

[@jamesjones-yn1sv]

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

[@jamesjones-yn1sv]

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.

[@jeyapandiann7051]

It should be positive to negative... Forward BIAS condition of a diode will be satisfied... Hope I am correct.. Thanks for the video.

[@diydinhobr]

Very Good Pen Test.

[@eduardomarin33]

Hola buen video, este me puede servir para detectar voltajes de 110 a 120 vols o solo para voltajes pequeños

[@Ove_Bjerknes]

In the video the leds is soldered minus to minus. Is that right? I think it's opposite?

[@parthibanm5631]

Very nice 👍

[@azizbachne2101]

Very Nice, Thank you 💐👍

[@surround1969]

smart idea ... Love it and gona make it

[@DChrls]

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!

[@monujangra3995]

kzbin.info/www/bejne/eKTTYaaKeauFmMU

[@misugijun]

that catched my attention when i was watching too, lol

[@edgarpy1088]

@@misugijun , Igualmente.

[@aftabbhatti7980]

Nice project 👍👍

[@bennyignacio9302]

the legs of the bulb? is it both negative positive pairing?

[@DISKARTEPINOYVLOG]

very interesting video.. good job sir thanks for shAring this video

[@miguelsaavedracorrea5578]

En el minuto 4.30, porqué soldó otro alambre en la punta si ya había soldado uno anteriormente?

[@edgarpy1088]

Es lo que tambien me parecio entender.

[@kayzer64]

It works with 12 volts???

[@msomasekhar5612]

Nice video

[@janinemojar5516]

The tester is used only for battery?

[@sciencetechnician8787]

Nice idea

[@ahmadtech7827]

According to ohms law the resistors are in series=+ you add 1+1+1=3k ohms

[@ricardoperez7675]

no explico que los polos de los led hay que soldarlos de forma invertida.

[@ajleestm3606]

Is this work both AC and DC ?

[@souravbhattacharyya3392]

Very nice project, did you file the iron tip or it had pointed tip since you purchased it?

[@severinomorais7494]

Muito bom, fiz um teste de polarização com resistor de 3 kohms nota 10.

[@rangiroa100]

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 ?

[@JesusFlores-el5oy]

Hasta cuántos vol se puede medir?

[@jeffreyatenta2100]

Boss ask ko lang kung pwede yan pang test sa motor KO?

[@emadk.th..3561]

احسنت العمل ... لكن الاقطاب معكوسة .. 👏🏻👏🏻👏🏻

[@redeemchrispanaongon8296]

what is the voltage range of this tester? can this be used for automotive?

[@Lemmax-X-exdom]

The circuit diagram is missing. - Falta el diagrama del circuito. (19 . III . 2023).

[@benjaminawat6458]

Nice video..

[@alyaakoubiyam]

هل يمكن تشغيل القلم مع تيار كهربائي 220v فولط ؟؟؟ 🤔🤔

[@Daily.ahmad707]

Amazing Bro stay Away Ameen

[@renukaamarasinha6407]

Very good thanks

[@augustinechinnappanmuthria7042]

Super 💖

[@robertolopez4964]

VERY GOOD IDEA

[@chalokipskips2352]

Thanks so much more fun and amazing

[@monujangra3995]

kzbin.info/www/bejne/eKTTYaaKeauFmMU

[@geovanysantos951]

Very good

[@AHy279]

Many other videos just use 1x 1K resistor, why in this video we need 3x 1K resistor? Maybe someone can explain, please?

[@krishnarjpatil5451]

Is it possible to make tester for conductor testing , like checking continuity of bunch conductor

[@ranjankumarbhattacharyya9941]

Please make a A. C. tester

[@armonfrohlich6348]

does it make a difference in function if you use a 1mm wire instead of a 2mm wire? Great Clips btw

[@tpgupta9079]

Very good.

[@jyotiacharya3902]

3k resistance could be use

[@lawrencejd8935]

Can you make one for AC?

[@khalilullameeshua5420]

வணக்கம் சார் உங்கள் வீடியோ காட்சிகள் மிக அருமை. இதே போல் எனக்கு tester செய்து கொடுக்கவும் சார். இதற்கு வுண்டான தொகை ( பணத்தை) தாங்களுக்கு அனுப்பி விடுகிறேன். Pls sir .

[@tameralsebaee1433]

Very simple and practical

[@monujangra3995]

kzbin.info/www/bejne/eKTTYaaKeauFmMU

[@ALeXanDeR-sb9gr]

Cuanto es el voltaje que aguanta

[@mohamedmusthaq7629]

Unless it can detect polarity of SMD components. That job can be done by a multimeter

[@narayandasshrestha4197]

Can we check 220v dc also?

[@geminmahraj]

See, the leds must withstand the 220dc.

[@maxwellrodriguesmoraes4882]

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.

[@alyaakoubiyam]

هل يمكن تشغيل القلم مع تيار كهربائي 220v فولط ؟؟؟ 🤔🤔

[@elyankhayat2900]

Than you Very good idea would you help me by circuit diagram .

[@romeogarrovillas4046]

what color is the positive and negative?

[@lawrencejd8935]

Red as positive

[@SaraswathiRMSaru]

Please I need explanation of this project.

[@RahulDas-fg2fg]

Music name please tell me 🙏🙏🙏

[@tio8189]

led your seri or paralel

[@lifelinema562]

Wao amazing 😘😘😘

[@zurairkhan]

Amazing

[@nandigg941]

Good idea

[@Eletrolitico]

magnifico, nota mil.

[@bramahanandasontakke106]

1.5 KILO OHM KA 2 RESISTANCE USE KARE SAKTE.

[@justabasslover4404]

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!.

[@YellowPurple]

❤❤❤

[@alainlasnier8900]

baterie voltage ??????

[@liteacetoyota8917]

Ur good but something is not right ..red must be positive not green light..

[@sophornphin6883]

love

[@palacioquimera1616]

Good work, thank you for sharing congratulations.

[@elyankhayat2900]

You can use 1 resistor 3k ohm instead of 3 1k

[@ihyaulumuddin1711]

Its because 1k resistor is easier to find from unused pcb

[@jaynerona9196]

Nice video. Can I use that in 12 volt car battery?

[@ihyaulumuddin1711]

3k resistor absolutely can handle 12volt battery

[@enockmonteiro]

Muito útil 👍🏻

[@Parymary-ix5db]

Awesome

[@VipanKumar-xj5jv]

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 🙏

[@Gadgets-q2x]

Bhai ap ne to koi cell ya battery b nahi dali. Phir ye kesay ?????

[@christosmakariou4574]

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.

[@alexandrepoloniato4616]

Good job

[@morelbuendia3622]

Do you make testers for AC?..If you do please share some ideas. Thanks!

[@damienweber2067]

There is no polarity on AC, so nothing to test… 😉

[@multitalent7273]

Were we find this type of copper wire

[@WorkshopofGeniuses]

kzbin.info/www/bejne/pYDUpoF5mbaKapo

[@parameswarat3031]

Ya very super sir thank you

[@khongguan6268]

Sy bikin tanpa dioda, yg lamp merah buat nunjukin plus accu, yg hijau nunjukin masa

[@yousefyaseen9867]

Marvelous

[@ihyaulumuddin1711]

Thanks shifu

[@charlescardosoIPDA]

Esse resistor é de 1k Pois as cores são: marrom, preto, vermelho e ouro