DIY transformer/inductor tester
Vložit
- čas přidán 30. 09. 2021
- Shorted transformer hard to tell? Let's build a tester of transformers and inductors. It can identify shorted windings, including just 1 short turn. It's hard to test switching transformers and inductors for internal shorts using any other tool. This tool is very useful, especially when fixing switching power supplies and inverters. It's a simple ring tester, testing the winding based on the number of damped oscillations it can make. An internal short will turn a high Q factor transformer or inductor into a very low Q one, resulting in way less damped oscillations (rings). The Q factor is affected by the internal short turns way more than the inductance is.
The next episode (in-circuit test capable version):
• DIY transformer, induc...
The tester and program on my website:
danyk.cz/avr_ring_en.html
Please support me on Patreon:
/ diodegonewild
My Instagram:
/ savage_danyk - Věda a technologie
I learn more in one of your videos that I've ever learned studying electronics in school... Great video as always.
I see this comment almost under any DGW video. ;-) I enjoy these videos too, especially cats comments.
czcams.com/video/NwuY7qbs2Dkl/video.htmline follower robot💝
Idem i' m 16
@@user-et1vj1oz3f Many more and be healthy ! :)
@@velceaiulian6439 thank you same for you!
Definitely going to have to build one of these. I fix old TVs and related junk, finding shorted flybacks would be very useful.
IMPRESSIVE performance!
Never tought it would see one shorted turn
One shorted turn makes a huge difference to the number of "rings".
Very interesting. This is a revamped version of the old school analog flyback testers used in TV repair. Good explanation too.
I wonder of its similarities or differences from the “blue“ flyback ring tester
Amazing demonstration of designing, making, and explaining how the tester works.
Awesome work!
I have never taught about that inductors and transformers can be tested for shorted turns that way
Absolutely fantastic little circuit, I will be making one this weekend :)
Mr. diode sir…
I know you’re a busy man… But I would be so happy if you made some more general troubleshooting videos. About fixing power supplies and common stuff like that.
They help me so much and they are very interesting to watch! You are one of the best teachers!
Something DIY after long time.😀
Great video with great explaining.
I've been watching your videos for long now, I like your voice and accent, it's so charming. Also, I want to be a engineer so watching your videos would definitely help me!
czcams.com/video/NwuY7qbs2Dk/video.html
Pid line follower
@@embeddedsystemsiotprojects2055 gooood job 👌
Excellent video. Thank you for all of the visuals!
With projects like this, I like to download the C source code and re-write it in assembly language... but with your projects, you've already done all the good work. ;)
I'm glad somebody else also appreciates assembly ;)
What a fantastic informative video. I have to build one of these - soo handy!
A great tool for testing shorted turns in transformer and inductor, worth to build one, thanks for sharing.
Wonder how this varies from the “blue2“ Bob Parker ring flyback tester? Always love it when Danyk talks about test equipment. Especially DIY test gear
I still have the original Bob Parker designed unit (released through Silicon Chip and Dick Smith Electronics) which is the shorted turns tester that he designed for testing flyback transformers. It works on a similar principle - a low frequency pulse generator that applies that to the coil or transformer under test and the number of 'rings' is counted and shown on a display. In the case of my unit it has a bargraph and uses transistors, an op-amp and a CMOS IC.
The unit presented here uses a PIC microprocessor and presents the results on dual 7-segment displays.
@@sw6188 This μcontroller's architecture is AVR, not PIC.
@@vaclavtrpisovsky Sorry, I wasn't aware of the AVR type of microcontroller. Technology leaves me behind some days!
Line follower czcams.com/video/NwuY7qbs2Dk/video.html
I looked it up.... it seems similar, but a bit overcomplicated, and it probably counts the rings down to a lower threshold, resulting in more counts.
This is the most amazing video on your chanel.
Using theory to make a useful device is great.
I watch your video regularly and wait for your next video .
Thank you very much for sharing your knowledge.
Nice project. Liked the build process being shown. Nice project. I think I will just make a jig with 555 to pulse the coil and use my scope to count rings manually. Great idea. THANX.
Nice scope. And cool idea/principle for measuring.
Brilliant! Thank you for sharing this and teaching us.
finally diode gone wild teaching on youtube using avr mcu 🔥
Nice ! And this bodged circuit is far more useful than most ebay/amazon phone chargers.
Thanks for this simple & efficient circuit.. 👌😀
great educational clips just like always. Thank you soooo... much for sharing. You are amazing.
You once said you never went to school for electronics. This is even more impressive!!
my respect for your knowledge dany 😯
I love your content. You explain it very well. Ty.
Top content. Thank you for sharing with us.
Nice project and good explanation...
Wow! I see you have a digital Tektronix ! Good for you ! This video (the project) seems amazing to me.
Definitely in the near future I will start doing this tester, because it is absolutely necessary for a somewhat advanced electronics technician.
I had problems at work with medium and large SMPS transformers, and the owner of the company did not make the slightest effort to equip us with absolutely no device in this regard. He didn't want to invest in anything. A stingy man you rarely meet. Almost all my attempts, with or without success, I did with my own control equipment and my components brought from home. In the majority.
Now that I'm free and I got rid of him, now with no plausible future, last week with all the dust and smoke "outside", I had the crazy courage to order a RIGOL DS1054Z, to take revenge on all the unfinished projects and ideas, and to resurrect all my dead devices which have been gathering lately.
My old oscilloscope is (was) a 10 MHz - C1-94 - analog russian that I have repaired twice in the high voltage inverter of the cathode ray tube, and yet somehow he came up with the idea of "piercing" itself in the mains transformer, on its own, which disgusted me completely to fix it. However, even in perfect condition, it is still morally obsolete and no longer worth it.
So, this is a must have. 10Q with the ideea in another clip about the ESR tester. I made it ! ;)
And to be naughty : Is there a B-H coil saturation tester ? :D
Great video as always
so good, mind blown simple
It was a very interesting Video ! Its a good Testdevice.
Great device and explanation. Thanks you for the video. 😼
Excellent project!
lol Watching a build for a change. Cool tester. Thanx.
This is such a great idea. Previously I've tested coils by manually putting a charged capacitor across them and watching an oscilloscope. This would be so much easier, especially since I don't have a storage oscilloscope. Maybe I'll build a hybrid version which just pulses the MOSFET with a 555 to ring the coil and then hooks up to the oscilloscope.
Yes, you can just put pulses from a 555 oscillator into the gate, and use no counter, just watch it on a scope. If it's an analog scope, it's better to use a higher frequency to make it better visible. Maybe 50Hz.
@@DiodeGoneWild Was the MCU code difficult to write for this ringer-tester, in order to get the timing right?
@@DiodeGoneWild can u please make it with a 555 ? i have an analoge scope 🙏
Nice device , also can use to find out the transformer self resonant frequency by connect to scope..
Really useful device! I might have to make one some time.
Some of the Atmel MCUs (including Atmeg 328) also have an internal comparator which would be more versatile than a regular input pin. You could use it to make the threshold selectable in software (combined with a simple PWM DAC).
I wonder if the pass/fail functionality on some o'scopes could do this?
You could also use comparator like LM393 connected to 4026 counters and 7seg display. However, these counters don't have the latch mode. 4553 would be great, but they are expensive and hard to get.
@@Ales.2000 I'm sure you could do it that way without a MCU, but I think it is well worth using the MCU for a device like this. In many ways it is simpler that way in my opinion. You dont need a bunch of specific logic chips and a complex schematic.
I like those red boxes, perfect for LED based projects
Very good idea. Last I used inductance tester and change frequency wich cause large inductance drop on the defect transformer at higher frequencies. For transormers with airgap I use a charged capacitor and current sense resistor to measure saturation current at romm temperature. You can clearly see the ramp up and the point wehre current rise is faster.
Nifty principle and well implemented
really love this one!!😁
Super nápad. Jinak koukám, že jste vylepšíl vybavení od toho ruského S1-118.
Cant you calculate the inductance too by measuring the oscillation frequency? Then you can use the LC equation to determine the value of the inductance.
Very interesting. Thanks!
Love your videos.
Good work
Thanks for sharing
piece of art!
genius! I love it!
Awesome man, thanks heaps!
Very nice. I want to build this to compare to my Sencore LC75 ring tester.
Absolutely awesome tutorial......cheers.
cheers ringing:-)
@@fredflintstone1 Squeak!
That's a very useful tool.
Great idea with this tester. Maybe next time you will make a power transistor tester, but one that will put a heavy load on them. :)
Fantastic great informative video
😱 that's what I was looking for
Resonance is beautiful :-) Very interesting device! You should finish the build "Professional CZcams style" ... with HOT-GLUE!!! But I guess your cat would interfere and tell you to use proper screws ... :-)
That’s Sorin’s favourite way lol. Unless he lives in a hotter climate lol.
great channel
Wow, that cat is always right! Indeed time for some insightgiving scopepictures!
But what a great and superusefull idea, this circuit! And what supergreat to share your program with this circuit! Thank you só al lot, because it makes copying your superusefull device so much more faster and easier for me, for us! There is nothing to try to improve it because you showed us already all the things one could think of. Indeed ideal as it is, and this way i would be stupid to nót build it because i can use it just as good because i have to build my ideas with mostly "recovered" components! Wow i am still impressed by your generosity (if that's the right word (i'm dutch)) to let everyone make use of your knowledge!(i remember years ago i found the circuitdiagram from my broken pc-powersupply on your website, áll the circuitdiagrams to easy choose from which one must be the one i had Just opended. I was (and still am) só greatfull for that!)..
And now you did think out this ideal and especially easy to build device that i can and thanks to you wíll use within a couple of days
Very cool. Thanks!
I built the CD4015 + LM393 based ring tester designed by Bob Parker a few years earlier. It can count only to 8 (with an LED bar), but still very useful. I would build yours if I haven't built the other one previously. I am an absolute dummy in programmig, so I had to choose a software-free version.
Muy buena herramienta, interesante
Very interesting!
Excellent !
Although slightly more dependent on special equipment. This can also be tested by making a wheatstone bridge where 2 legs are resistors and one is a known good inductor or capacitor in parallel with a potentiometer. The device under test is the final leg. after balancing the bridge (excited with an AC voltage or current) the ratio of resistance to reactance is shown by the potentiometer and capacitor/inductor. While this requires an ac source and detector, that could be as easy as a mains transformer and voltmeter if component values are large. All other parts can typically be found from scrap.
you are the best , thanks a lot
wow very good !! thanks a lot !!
Very interesting 👌
11:38 Niiice red hot glowing resistor lead effect. :)
I would love a video about mag amp post regulation on secondary rails of SMPS
Traffic lights with car detection loops in the pavement work like this. The loop is an inductor and it rings many times when there is no car on the loop. A car or even a motorcycle effectively shorts the coil slightly and the ringing is damped. Like when Mr. Wild puts a shorted loop above the cooker coil.
Fixed radars works like this in Brazil and you can see where the pavement was cut in a coil like shape
Nice sharing sir watching here sending full support
very nice idea :)
It's so accurate!!
Nice. You need a list of typical ring numbers for different devices.
Great work and a nice and needful project. I searched my bins for parts.... I can use AT Tiny84 (24/44/84 are the same except memory) and a IRLZ34N with Vgs(th) 2.5V and above @ ~60mOhm. Breadboard Weekend 😃
I think you can ;) the transistor has a higher on state resistance, it might reduce the number of rings a bit, but it would probably still work..
@@DiodeGoneWild Thank you. Only have a very old green dual 7-segment LED (from 20years old PC "Speed Indicator") . I was concerned about the current consumption (23mA @2.3V per segment), but read in the datasheet of the attiny thatt each pin can drive up to 40mA. With multiplexing there is only one segment at a time - right ?
@@DiodeGoneWild
Pid line follower
czcams.com/video/NwuY7qbs2Dk/video.html
It Was Awesome
to musím mít :) Díky
Brilliant! Excellent application of utilizing the characteristics of the ringing to an advantages. I wonder how long it will take for your design to be swiped, manufactured and end up for sale on Ebay? I would like to see the circuit redesigned to just drive an oscilloscope, please and thank you.
rhank you!
interessting slang, but perfectly understandible !
and great video, my teacher since ...should be good as you! then i probatly would be better, than i am now in repairing things.
best regards, long and healthy live !
Sorry for my poor english !
Will you please do video regarding to the conversion of TL 494 /KA 7500 powered half bridge SMPS to adjustable bench power supply with current control.
Nice!
Steady on! Looks just like a bought one.
Hahaha, yeah, it looks far too professional compared to for instance his battery capacity tester, which works so well, but looks absolutely terrible :-)
Awesome
V knize Amatérská elektronika v domácnosti a při rekreaci (Arendáš, Ručka, 1984) byl také popsán zkoušeč cívek. Po připojení cívky do obvodu vznikl jakýsi bzučák a podle stavu cívky se měnil tón. Velikou nevýhodou byla potřeba mít ještě jednu, zaručeně dobrou, cívku pro porovnání.
In the book Amateur electronics in home and for recreation (Arendáš, Ručka, 1984) there was also described a coil tester. After the coil was connected to the circuit, a buzzer circuit was formed and its tone corresponded with the condition of the coil. The great disadvantage was that you had to have one more, certainly good, coil for comparison.
Amazing
These days, it can also be vital to know the operating frequency range of an inductor i.e. is it iron dust or ferrite. Would it be sufficient to measure inductance at a range of frequencies - any thoughts ?
Fun fact: This type of circuit is used for inductive sensing in wireless water meter reading. Meters have a half-disk made of metal that spins as the water flows, and an inductor can sense it.
E.g. TI devkit TIDM-3LC-METER-CONV and many more. However they use ceramic capacitors, which after a quick datasheet search on TME, have a shit dissipation factor, around 1% compared to 0,01% for PP capacitors.
Kind of a bummer that PP caps come only in high voltage huge package versions.
Yay!
I certain would use the big display, probably catch more attention from an uninterested person when I'll show, like this: I coming with the project and the guy "what are those". XD
Please make a video about the inductance meter.
16:43 "There is some power factor correction inductor from an active power factor correction". Excellent sentence to repeat few times before bedtime to keep boogeyman away.
Pid line follower
czcams.com/video/NwuY7qbs2Dk/video.html
@@embeddedsystemsiotprojects2055 gooooood man❤😎👌
Nice
Please 🙏 make a video on the diy inductance meter.
Cool.
25:44 I think the first 2 pins that are the most spaced out from the rest and eachother are the primary.
It's the case in most IHVT's, but not in this one. The second pin seems to be unused.
@@DiodeGoneWild can you somehow test how many primary turns generic crt flybacks have? I am experimenting with CFL driver resonant converters driving crt flybacks and induction heaters and so far all my attempts with custom transformers fail, meanwhile a CRT flyback is plug and play when I reuse the factory primary.
I will test it on arduino, and the output is on sreial monitor as usual. Thank u.
Inspiring video, as always. I wonder if this could be used to test windings of a motor. I have a few questionable ones and I'd like to to be able to prove they have a problem or they are OK. Any thoughts?
It might work, but there are generally less rings in inductors with iron cores, motors would probably be similar. It might require a higher capacitance or counting the rings down to a lower threshold.
Nice.
Wow. Interesting that one shorted winding has that effect on the ring. Small suggestion: use double dash for open? Just looks nicer I think. O r OL like multimeter.
I also tried it, but one dash draws less current from the battery when it's not connected to any inductor :)
@@DiodeGoneWild
czcams.com/video/NwuY7qbs2Dk/video.html