Inductance meter with Arduino

[@sayantanmaiti2513]

Bro this full theory and math was amazing... Really was looking for such a inductor meter.. And you did it

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@ed6213]

@Electronoobs Thanks for this tutorial video. I know that it is a bit old, but I am hoping that you are still monitoring and responding to questions about this project. I have a few questions: 1. Why not use the Atmega328p internal comparator (available on the analogue input pins) instead of an external comparator chip? It may need a more accurate method of measuring the frequency period, but this could, perhaps, be done with an assembler code loop. 2. If an external comparator is absolutely needed, why not use a LM393 dual comparator (smaller IC package) instead of the LM339 quad comparator? Is there a difference in characteristics between the LM393 and LM339? 3. Also, if an external comparator is needed, why not use the internal digital input pin pullup (i.e. INPUT_PULLUP mode) instead of the external 330R resistor? Thanks.

[@kamussuwanto3097]

This is good questions, i also need the answers. I am building a lc meter with lm339

[@SiraTech]

Bro, i made this today to check the inductors, and it works perfectly!!! I had to reduce the delay time after the power in to the circuit is off ( i used a 0.1uf cap though).. keep up the good work!!! Thanks!

[@kamussuwanto3097]

Hi how did you make this? Would you share your shematic and code? Thank you

[@kamussuwanto3097]

Is the measurement accurate for inductors below 80uH?. Thank you inadvance for your response.

[@klaasklapsigaar1081]

As a noob I thought "Dang son, this LM339 is gonna be hard to find!" Looked in my junkbox anyway. Litteraly the first place I looked I found two LM339N chips, on an old partly scrapped PCB from a computers ATX powersupply. This is cool!

[@vishal01mehra]

can you conbine all these meter series in one arduino that would be awsome.

[@ELECTRONOOBS]

I will in the future!

[@Pageportal455]

Electronoobs its already 6 months. How more time, would it take..??

[@hacksci4fun439]

yes !! I also want this ( LC with frequency meter ) , plz write code for both serial monitor and 16x2 parallel ports in one :)

[@kaoshavoc]

should be pretty easy to put them together but of you are gonna use an I2C display you may need something other than an arduino uno since it only has 6 analog inputs and 2 of them are used my I2C. the hardest part would be the menu code but there are a lot of examples of menu code out there.

[@josemontoya994]

@@liontron-x1v lel, he just do it

[@vex9596]

Would be great if the code actually worked. It's either incomplete or bad.. the only thing it does is print "Why hello" in the serial monitor (115200 baud rate). I've also noticed some differences between the supplied code on the blog and the one being used in the video, but neither actually seem to work lol

[@christianejikeomeje3145]

Woow You are too exceptional, your teaching is top notch, i will be following your page

[@pyromen321]

Why not use the comparator built in to the ATmega338p? I know I’m a bit late to the video, but I think the built-in comparator has a response rate of something like 125-250 ns (4-8MHz) It seems silly to use a dedicated comparator when an arduino uno already has one Edit: in fact, I think the ATmega328p’s comparator has roughly the same response time as the as the LM339 you used

[@incxxxx]

Try and you understand why he did not used internal comparator.

[@UmbraAtrox_]

Freakin youtube. It took way to long for your channel to show up on my frontpage. Subbed.

[@ELECTRONOOBS]

Micky S. thank you very much!

[@alphonsesynrem28]

You are so cool and very simple to teach people. Thank you.

[@TYGAMatt]

Works perfectly. Good job sir

[@ubiquitousingit]

Thanks for making this so detailed 🙏

[@acestudioscouk-Ace-G0ACE]

This is very good, the first of yours that I have seen. I'll check out your other videos. I've subscribed!

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@rmgnair]

Excellent tutorial. Kudos. Thanks for educating viewers like me.😀😀

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@overmanonfire]

Excellent job in explaining how it works , You are a Guru Thanks for caring and shearing

[@dqj999]

A really well explained project!

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@Juan123qwerty]

Can I use an Oamp instead?

[@VeryMuchBlessed]

Super instructive video! Very good project. Thanks much.

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@czmik]

Can i use an optocoupler zero crossing point circuit instead?

[@czmik]

With changed programming of course

[@ELECTRONOOBS]

I think that would give you just a small peak each time you have 0 crossing. using the pulse in function you need a 50% duty signal in order to double the time and get the period. But i guess you could manage to count the time between each peak

[@czmik]

it doesnt really matter what length is the pulse because i want to use interrupts instead of pulsein() because it locks up the whole mcu while its waiting for the end of the pulse

[@ELECTRONOOBS]

Then ok. Using interrupts you increase a timer ant count how often dose that pulse oscillate. Sounds perfect!

[@oniruddhoalam2039]

@@ELECTRONOOBS I think such a circuit should be made on a PCB as the breadboard construction adds parasitic capacitance to the circuit.

[@jtb8631]

this no longer seems to work for some reason. also there are several errors in the code available from your website. and the library provided does not seem to want to cooperate. I would appreciate some help, as I would like to have one of these handy for quick and dirty approximations of inductors.

[@zanovis]

I also cannot get it to function. Have you had any luck?

[@lastmanstanding9389]

Do you gave any designs on a loudspeaker impedance tester?

[@miftosaurus]

... after a week or so of swearing and frustration caused mainly by bad breadboards, with bad contacts, i made this thing working. yes, 1 uF, but changing the value in the code, it will work, too, but with another set of coils. next, if your inductor/coil/solenoid is shorted (very rarely, but sometimes happen, check with an ohmmeter, to see if reads a short!), the signal will be grounded, and measuring will never happen. same for a too high or too low inductance: no measuring, nothing will be displayed. without anything unless the cap, nothing will be measured, too. i use just one 1 uF cap, and finally started this thing. results from serial monitor: 91 us 5494.51 Hz 0.82 uH with another coil: 312 us 1602.56 Hz 9.66 uH without any change in code, i put another 1 uF cap in parallel (so, a total of 2 uF, or around...), and i get, for the same coil from the first results: 130 us 3875.97 1.65 uH tried an axial inductor marked DLA 10 mH, not working at all. but with some inductors randomly harvested from ATX power supplies and "economical fluorescent bulbs", it worked nice. too low or too high coil resistance will cause that thing, again, to not work... so, first time, try it without any coil, and check if you get a signal on comparator's input pin. be sure your capacitor is not shorted, too! looks like i can measure, with a 1 uF cap a 0.10 uH coil... hmmm... this was the lowest one: 31 us 16129.03 Hz 0.10 uH i tried to measure a mains trafo, primary and secondary side... nothing, maybe too high inductance in primary side, and on secondary, too low resistance of winding... now... is time to put this thing on a small perfboard, and doing stuff... code is working, but the oscillator is not working with ANY coil. so, try to find a similar coil like that one from video. be sure about your soldering, too... a wiggly or poor soldered wire will drive you crazy! :D ah, i used an SSD1306 display. just a question of using the correct library, and invoking the correct statements. easy. because i have no I2C LCD here... just a lot of 16 pin LCD's, and a lot of SSD1306, 128x64 or 128x32. good luck.

[@acex727]

Can u share the code?

[@ozyprima]

can i buy a ready to use inductance meter from you sir?

[@3dtexan890]

Where do you get the 1602 with straight pins? All the ones I see have the pins bent. Even you link shows 90 degree pins. Do you straighten them?

[@rakotondramananasamuel3970]

did you have any inductane meter more precise between 1uH and 80uH ? it's also very usefull

[@Yuēhàn24]

Hi, Great video, just came across it. Is it possible to read inductors as low as 1nH, or is uH its limit?

[@8elimA]

thanks for your excellent job, it is so useful

[@Gromo_Z]

Can you tell me if the LM311 comparator is suitable?

[@omsingharjit]

Where is all in one lcrf meter code ?

[@josebatista8981]

Great job man! Congratulation! Can i use a oled display in it?

[@armanhossain2491]

can i use ceramic or polar capacitor.because i cannot find non polar capacitor in my country

[@aviralpatel2443]

polar capacitor can not be used because it can only be charged in one direction but for oscillations to happen it should be able to charge both sides.

[@GeorgeGeorge-xj2bc]

Its been a long time since then,but the non polarized capacitors have better capacitor accuracy and stability over the time compared to the electrolytic capacitors.

[@electroamin2696]

hi , made it and it works fine , but if you use 2.5uF capacitor and DON`T change the code , it works even better :)

[@ISLAMguidanceful]

why are we using non polar capacitor? is it possible if use polarized ones?

[@incxxxx]

Yes, of course.

[@big_o1952]

No it is not as the LC tank will resonate and generate an ac wave ​@@incxxxx

[@vizionthing]

Awesome job, just make sure you smash that like button an odd number of times :)

[@ELECTRONOOBS]

LOL, thanks!

[@tandex3414]

Just charging inductor and rapidly checking current is good design?

[@driftandreas]

Скетч не такой как на сайте. Есть новый?

[@jaber-ali-00]

Great tutorial. Thanks

[@DanielStingBR]

What is the range of measurement?

[@sksahil4374]

How accurate is this ?

[@sk9296]

Sir which software r u using for video editing

[@martinkuliza]

6:54 You'd probably do better to use a rectangle wave with a duty cycle of 10% , You'll get a better ring off the inductor and depending on the inductor value you could drop that to 5%, Although this doesn't work for every inductor. 10% is the way to go in my opinion

[@pawan85285]

What software is used for editing ?

[@jae-shinjung6828]

Hi Sir! Do you have emf meter?

[@paololamoratta3259]

By increasing the capacitance you can achieve a bigger precision?

[@kamussuwanto3097]

Hi Electronicnoob, this is a great video for LC meters. My question is that is this project work WITHOUT a i2c connector? The arduino itseft can function directly connect to 1602 lcd.

[@hugobracamontesbaltazar]

Very interesting, thanks for sharing!.

[@adeenlubeck6197]

How can one use the digital display on this inductance meter without the i2c interface. if possible ,what going to bet the code adjustment. thanks

[@johndevires5911]

Nice, thank you.😉👍

[@beaconofwierd1883]

If I only want to measure a "large" inductance, say mH, would it be possible to measure the inductance accurately using the same method as for measuring the capacitance? From what I understand, the reason we can't use the same method to measure inductance is because as we increase the resistance we are lowering our "charge time" in the LR circuit, thus our arduino at 9 kHz sampling frequency (76 kHz if you play around with if for a while) isn't fast enough. But if I use 76 kHz I get a "resolution" of 0.01 mH, so that should be enough to measure mH accurately, right? Also, we should be able to least square fit the exponential curve to get a good accuracy despite noise in the measurements, right?

[@oscarwong9694]

Hello, we made very nice Inductance meter according your schematic and program. Thanks

[@oscarwong9694]

However, when we try to measure the inductance value from your said uH to mH. It is out of range, how can we modify the circuit?

[@ruhnet]

Great video. Thanks!

[@milithemuffin4534]

Is it possible to mearsure inductance of DC motor using this circuit? Also should i lock the shaft (so that it can't rotate) for the test?

[@ELECTRONOOBS]

you could. Depends of the motor. If it is very big it might be out of range.

[@Elitesniper257]

Mili theMUFFIN I would lock it up if I were you so that it doesn't change inductance when and if it turns

[@gatesadrian1]

Great tutorial...thank you!!

[@elninorosario]

During negative peak won't the diode be forward biased🤔 ... I think you have assumed the Arduino power supply to have a diode too?

[@butchness6980]

bit of an old video but @electronoobs after looking at your webpage and video really closely I cannot get this project to work using both a 220uF nonpolar electrolytic cap as well as a 1uF ceramic cap. With both circuits it does not output anything, I have changed the value in the program. I have tried different ICs as well as different Arduinos. I don't have a scope so I can't check anything else really.

[@MohamedElSayed-ql4ue]

Hey man can I use any other operation amplifier like lm358

[@michaeljoshuamanallo1742]

can I use a op amp as a comparator like lm348 op amp????

[@mascabrother3366]

What ranges does it measure inductance?

[@mochamadwaysalqorni]

Can i use ordinary lm324 or lm358 instead??

[@SalmanKhan-qg4hw]

can i use 1n4007 diode istead of 1n4001 diode

[@kahe7436]

Get a fast diode instead

[@hernanmarcucci7500]

sorry i can not understand full concept of the circuit. The pulse is stop and the compartor read the residual resonance or the arduino sweep a lot of frecuncy ??

[@ELECTRONOOBS]

Is not residual. The resonance begin when you cut the pulse. When you go from 5V to 0, the LC tank will resonante and we read the frequency of that resonance. Good day!

[@hernanmarcucci7500]

@@ELECTRONOOBS thanks dude, saludos from Argentina, sorry for my english

[@hernanmarcucci7500]

Sera muy complicado hacer un medidor de resistencia equivalente "ESR". Estaria bueno hacer uno con Arduino o FPGA. !!!!!

[@mihaiiancu88]

Can LM319 be used instead of LM339? Thanks!

[@ELECTRONOOBS]

Yes!

[@mihaiiancu88]

Electronoobs thanks! I have a 319 home and i will use it. To be honest, as far as i've seen from your schematic, you are using just one comparator out of 4

[@ELECTRONOOBS]

Yes, single OPAMP is more than enough. I've used that because is what I had, Keep up!

[@hacksci4fun439]

can lm393 be used , i had buy 393 mistakenly instead 339 or 319 ??

[@Dinomightism]

@@hacksci4fun439 Yes!

[@wahyupans8868]

Hi, can i replace lm339 op amp with other op amp

[@AiQuantitativeTradingSystem]

Plz Help I have this message error when compiling code: #error insert your used capacitance value here. Currently using 2uF. Delete this line after that

[@electronic7979]

Nice video

[@guilhermevigorito1646]

Hi, can i use lm358 instead lm339??

[@naumanhafeez6794]

What frequency it is measuring the capacitance at?

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@jawhar7209]

great work ♥♥

[@mhafied8165]

Your code not work.... the library i2c can installed but after install not happened

[@amitpatelpatel144]

Bro what is the refresh rate of display?

[@mik310s]

How to get this to work without ic2 disply? Just a normal none ic2??

[@sksahil4374]

Hey!!what is the mainimum value of inductance it can measure Very accurately ????

[@nicodeklerk9218]

Hi Thanks for this Inductance meter. I have build one . It is working but I don't get the correct values. I have played with different Capacitor values but is still not giving the correct value. I have put different values in spreadsheet to see if I am same factor out but it is not. Any idea what can I do to check for a problem.

[@ELECTRONOOBS]

How big is the error? You should change the resistance values in the code and fine tune de measurement...

[@nicodeklerk9218]

Thanks for reply .The value on a 1000microH inductor reads about 800microH with 0.88microF cap. When I change cap to 2.37microF then value is only 650microH. In your reply you mention resistance value change in code . Is this a mistake because I did not see in code that, only change the capacitance value?

[@Max_Moura]

Nico de Klerk, it really seems to be a mistake. I think he meant "chage the CAPACITANCE value". See the code: #error insert your used capacitance value here. Currently using 2uF. Delete this line after that capacitance = 2.E-6; // - insert value here

[@electronicsthatsit2550]

What changes in program for make it without I2C

[@adrianm9570]

a little bit too late maybe but i have a question, it's possible to make it for smallers inductors like 33 uH inductors or speakers inductance?

[@GeorgeGeorge-xj2bc]

Speaker inductance i dont think that is small value.

[@kaletsugas]

What is the range of values this meter can read?

[@glauciogv5225]

Hi Joey, in his site (electronoobs.com/eng_arduino_tut10_3.php) he tells something like 80uH to 30,000uH. That´s a very simple and nice project, but unfortunately I need to read smaller values, bellow 80uH...

[@varshithkumar7782]

@@glauciogv5225 Hey man did you try doing this project? Need some help in doing this. Not able to get the output from pulseIn function.([e-mail])

[@wernerpeter9706]

After a long search, I found all the errors, both in the code and in the wiring. Unfortunately, the published code is NOT the working code as shown. - Definition of the variables: inductance__mH (with 2 instead of 1 underlines) - look at the pinMode (11 and 12), INPUT and OUTPUT changed - pin 13 in code comment and breadboard schematics is not in use. Only pin 11 and 12 needed! Video, Schematics and Code do not match. Inductance meters now working fine and amazingly accurate for a DIY. Thank You!

[@franceenvincesanandres3268]

can u share the working code please?

[@অৰি]

One will face trouble while attempting to measure an unknown inductor with a very low series resistance(inductors made with thick copper wires or fewer turns or both)! The charge will get grounded first(because of the low resistance) before it can charge the capacitor!! As an upgrade- Either disconnect the inductor from ground while the capacitor is being charged or eliminate the diode & resistor arrangement and instead simply charge the capacitor through the unknown inductor. At the end of charging cycle connect the inductor to ground !

[@electroGoal]

can it work with TL072 op-amp

[@fabioriemke]

Amazing videos Bro

[@sanjoybiswas7289]

Sir display not work properly. Display show to blank

[@igrewold]

Thanks a lot man. What is the smallest and biggest value can this read? can it read nanoHenry (nH) ? (even if you change the cap value to higher/lower)

[@igrewold]

@Badr Ahmed LCR / Component Tester kzbin.info/www/bejne/bXPVZH9nd51jpdk ar.banggood.com/buy/lcr-component-tester.html

[@varshithkumar7782]

@Badr Ahmed Hey man did you try doing this project? Need some help in doing this. Not able to get the output from pulseIn function.([e-mail])

[@varshithkumar7782]

@Badr Ahmed okay cool brother..... I just have to fix the pulseIn function.. I am getting the correct square wave from opamp as well. I measured its frequency and it matches with the formula.

[@varshithkumar7782]

@Electronoobs can you help us bruh

[@saadkarim6994]

great video as always

[@ezequielaugustodelcastillo6467]

Mr. Electrnoobs, sr... I have a question. Can I use LCD I2C adaptor and analog sensor? I'm asking that because I understand you couldn't use Analog Port to read two types of data (Analog and Digital) same time when SCL and SDA are digital I guess and For example LM35 or DHT11 output signal are analog, right? Best regards.

[@ELECTRONOOBS]

I don't entirely understand your question. Could you repeat it? Español tambien si quieres! Keep up!

[@ezequielaugustodelcastillo6467]

Electronoobs ok! lo siento. tengo entendido que al usar el puerto analógico para leer valores digitales (en tu caso, los dos terminales para el adaptador I2C) no se pDoria conectar un sensor analógico. que tan cierto es?

[@ELECTRONOOBS]

Si quieres usar el A4 y A5 como entrada analógica puetes. Pero no puedes usarloas a la misma vez que los usas para i2C.

[@ezequielaugustodelcastillo6467]

ok, igual me referia a otra cosa. Por ej. Si uso A4 y A5 para el adaptador, ok? Puedo usar desde A0 a A3 para conectar sensores analogicos? Saludos

[@ELECTRONOOBS]

Claro que puedes. I si usas el arduino NANO tienes el A6 y A7 tambien como funcion de ADC

[@adnanansari8213]

Sir, Can we use 100nf capacitor instead 1uf?

[@incxxxx]

yes of course. In general you have to select proper cap.

[@abbosbek7251]

Thank You

[@fotismirage]

hi bro can it meter industance from ferrite core inductor??

[@Max-ou5rn]

Hello the whole time built up loud instructions only get it not at run somewhat does not fit there shows nothing at display is however okay.

[@edwinr4378]

Bro it's awesome 👌

[@arifqurbanov2159]

hey man thanks for this great tutorial. But in my circiut it outputs about 10 time right value then it decreases for one time then again and again. Can you help me for that

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@DNAP460]

can measure under 10uh like 1uh. I really need it

[@soundarrajan17]

What is the maximum inductance can be measured with this setup?

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@nathaliesteger6785]

hi! very nice tuto Why the code doesn't works whith my arduino IDE The message is " liquidCrytal_I2C" not found. I change 0x3f by 0x27 but no change. Library has "liquidCrytal" and I2C separate may be that the probleme.May be you can help thanks

[@ELECTRONOOBS]

Make sure you install the liquid crystal library that I give in the video description!

[@rpanahi5804]

bro you are a LEGEND

[@rpanahi5804]

bro I want to make a crossover frequency for my DIY speaker Project that's why I needed an Inductance meter please help me it's going to be center Chanel on my home theater system I got 8-ohm tweeter and dual 8-ohm woofer in parallel that becomes 4 ohms in total my tweeter is Dayton Audio DC28F-8 and woofer is Dayton-Audio-DA135-8 I know u have a lot to do but it's my first DIY project and I am really excited about it thank you

[@thafimulislam542]

Radio shake in my country dont have non-polarize 1uf what happen if i use polarize 1uf.????

[@michaelcostello6991]

How accurate is this meter. Is it within say 10% . How does it compare with the basic meters on sale in shops. Please advise ANYONE ??

[@jayralph2067]

can i use lm358 instead lm399?

[@ELECTRONOOBS]

Yes!

[@dummydummy3388]

sorry for this noob question sir but can i use lm358 op-amp as a commparator??? beacause its the only component available for me at this time...your answer is very appreciated

[@electronicsinhome8697]

kzbin.info/www/bejne/bJ60Xn-EaLV6rbs

[@mdrezwandanish5526]

LCD turns on but nothing is showing.... What now ?

[@hernanmarcucci7500]

After a secong view of your video i can finally undertand the concept. The 5 volts desapear , the rosanance began but just live for a short time, you count this pulses. This is correct ??