LC Meter - Build - Part 4
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- Опубликовано: 17 мар 2021
- LC Meter v1.0 - coreWeaver / ioCONNECTED
Part 4 - Testing the LC Meter and the PC Application.
This is an open source project. You may use, modify and distribute both software and hardware as long as you give credit.
All the project's files are available here: github.com/coreWeaver/LC-Meter
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GIVE AWAY FOR THIS SERIES:
Post a comment and tell me what you think about this project. You'll get a chance to win one of the 3 PCBs I am giving for free at the end of this series.
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Special Thanks to Neil Hecht for sharing his project and ideas with us.
Music:
Voyage - LEMMiNO. Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
/ lemmino-voyage 
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I am stunned at the amount of work you put into this beautiful piece of equipment, you acknowledged your peers and went to extremes to explain its theory of operation and design...further to this you give it away freely. Really really impressed, although in my work I would have little use (no need to be so precise in my repairs) of it I should like to build one just for the joy if it. Thank you!!
yeah that's the basic idea. To build it with your own hands, to understand how it works, to debug the errors and then improve it, make your own changes, and motivate others to buy a soldering iron and try that too. That's how electronics begins.
...just my two cents and no one else / doing something else should feel offended.
Thanks for your comment. I appreciate it !
Well done, thank you for the step by step details
thank you for watching :)
Wonderful LC meter. A Very nice tool.
thanks for watching !
Great series of videos, thank you!
I liked the most pcb design (part 2) and part 1 for the detailed theory, you don't see that much on RUclips in my opinion.
As not a total beginner in electronics nor a master, I would have loved some explanations about some choice you made (decoupling capacitors, why you choose some components over other ones...) but that would be a lot more work I guess.
Anyway, it's a good idea to cover every part from the idea to the final product, it's very interesting!
yes, I could've gone even deeper but I was already afraid it will make this video boring and too long. As for the caps I used, if you're referring to the IC decoupling caps, it's common practice. Most datasheets recommend 100nF on VCC, AVCC, pins. It's not something critical, I mean you could use 47nF or 220nF. Thanks a lot for your interest in this project.
Time you got more subscribers! Very detailed indeed and I'm glad I came across your channel. I'll be keeping an eye out for more projects of yours.
Excellent work from the beginning to the end. Very useful and well documented project. Thank you for your effort and sharing all your work with us.
Actually thats not the last episode. There's a Part 5 in this series where he measures extremely low caps with this self made device.
Great build. We featured this video (and the other parts) in our homemade tools forum this week :)
Thanks. I'm glad you like it
Amazing effort, with excellent theory and design explanation that is so critical to understanding design. Thank you and would love to see more of your videos.
Thank you so much. Please subscribe and keep your thumbs up ! 🤩
Thats really awesome project and well expalained videos thank you so much, keep up ur works superb
thank you so much
excellent
thanks
I watched all videos of this project. It's really great project! Gut gemacht! But It would be really cool if you update it by adding resistance measuring. RLC meter. and even adding diode and transistor meter will be really useful. Waiting for updated version. Thanks!
there's gonna be a v2.0. The concept is already starting to take shape. Subscribe and keep your thumbs up. Thanks for your support ! 😍🤩🥳🥳
A masterpiece 👨🎓. My RESPECTS 👏
Thanks a lot. You took your time and actually watched the whole series. Try my other vids too and tell me what you think. ☢😎🤩
@@coreWeaver
Building a USB - HID Keyboard // Nixie Clock - "the RAD Master 1000" (and his background music)
another MASTERPIECE videos.
Keep posting more!!!
God Bless You! and God Bless America 🙏
RESPECTS 🤝
I found this video series very inspiring and educational. Thank you very much! I am working on a derivative measuring device, based on this piece of art
thanks for your comment. Good luck and stay subbed !! there's much more to come
Wow. That really is great work. I will for sure build one myself. If you want to give me one of the PCBs, I would be really happy. :)
Great work man! The details and the amount of work you put into this is absolutely stunning..
Can you please tell the range of values of capacitance and inductance, this device can measure?
(I am sorry if i missed this in the videos or in the documentation)
Thanks. The range can be calculated based on the min/max freq the AVR can measure. I didn't have time to look into that. I can tell you that I measured as low as 220nH and up to 1mH Inductances, and for capacitances from 1pF (!) to 1uF. With some slight modifications the range can be extended.
I've updated the Bill of Materials and Layout PDF. Go and check that first and let me know if you still have trouble finding a component.
With computer software? Awesome... 👍🏻Are this with short detection? What's brand of probe?
Thanks !
For the sockets I used "2.0-mm miniature socket": www.reichelt.de/gb/en/2-0-mm-miniature-socket-red-mbi-1-rt-p11294.html?CCOUNTRY=447&LANGUAGE=de&GROUPID=7556&START=0&OFFSET=16&SID=94d4e441a55fffb54adc5a3db595718ec82bb56dece7a0937fa80&LANGUAGE=EN&&r=1
I used these probes: www.reichelt.de/gb/en/test-probe--2-mm-red-mps-1-rt-p13109.html?CCOUNTRY=447&LANGUAGE=de&GROUPID=7557&START=0&OFFSET=16&SID=94d4e441a55fffb54adc5a3db595718ec82bb56dece7a0937fa80&LANGUAGE=EN&&r=1
these alligator clips: www.reichelt.de/gb/en/miniature-alligator-clip-2-mm-socket-tin-plated-red-ma-1-s-rt-p130862.html?CCOUNTRY=447&LANGUAGE=de&GROUPID=7557&START=0&OFFSET=16&SID=94d4e441a55fffb54adc5a3db595718ec82bb56dece7a0937fa80&LANGUAGE=EN&&r=1
and these leads: www.reichelt.de/gb/en/2-0-mm-mvl-2-25-measuring-lead-red-mvl-2-25-rt-p106055.html?CCOUNTRY=447&LANGUAGE=de&GROUPID=7558&START=0&OFFSET=16&SID=94d4e441a55fffb54adc5a3db595718ec82bb56dece7a0937fa80&LANGUAGE=EN&&r=1
Thanks for the Video! i would also like to enter the PCB draw please. I don't have a 3d printer so i found the first 2 parts were really enjoyable. I liked that you left in some teasers/exercises for the audience like adding a FTDI or porting the code to C for example. And after seeing just the word subscribe 200 times i will now subscribe ;)
yeah I was curious how many will appreciate those "teasers" lol
for that reason only, I'll wait a bit longer till I start designing v.2.0 SMD only. That and the fact that I would probably wanna redo the case too, in order to accommodate a much smaller PCB. Thanks for watching
This is really cool. Where did you get your precision calibration capacitor? Just bought a tight tolerance one from a distributor? The first and second videos were probably the most helpful to me, since they laid out how the circuit and the principle works: your case is really nice, though I already know designing for 3d printing mostly in different apps, so I went quicker thru that video. It was cool to see it in action in this one!
My multimeter has some capacitance measurement but no idea how good, and my cheap import "component tester" can do some capacitor (maybe inductor?) Identification but using some other technique, since there are no relays or lm311, iirc. I'd assume this one is probably even better? Any temperature effects, or is the ease of self calibration enough to solve it?
In the short term I'd recommend trying lithium ion pp3/9v batteries: they're just 2 cells so 8.4/7.2V, no boost converter adding noise, and the capacity is really good compared to alkaline or NiMH.
I've updated the BOM .pdf file. Go take a look and tell me if that answered your question. Oh and thanks for the battery suggestion.
I believe the calibration will deal with temp. fluctuations unless they happen very rapid/frequent while measuring something
Great Project. Can this LC meter measure inductance lesser than 1uH, that is in nano henries ?
Great project. I could not find the part I am after which is how to measure the DC parameters of an inductor, something like: inductance, the DCR etc. However, I would be greatful if you could give me a hint how to project a meter for inductor DC parameters. Thank you.
Cheers for the video series bud, it was interesting. Are you an (Electrical) Engineering student? Well done :-)
Thanks a lot man. Not a student anymore.
جميل جدا لكن اريد معرفة الجزء العاطل في مقياس الخاص بي (vector vc9808) بسبب قياس مكثف10u مشحون 300v ..😢..الان يعطي قيم خاطئة L..c..هل يمكن إصلاحه ليعطي قيم صحيحة ؟
Thanks for sharing this, I would like to make one, is there any chance of having a copy of the pcb in a pdf file ? best regards............Peter
email me and I'll help you.
core.weaver@gmail.com
Did you think about using a 0 offset function? Would it help? I.E calibrate with leads both open and shorted
In the code you mention you used a resonator at 4Mhz to get a more precise timing period for timer1, naively I would think that might help a decent chunk towards finer accuracy of the meter; it would be cool if you could show that at some point, or possibly any other methods of gaining accuracy on the period. Would using an RPi with pulses sent using a short C / Go program, or maybe using USB->serial from a computer also be a good approximation?
it's possible. if you have a very accurate oscillator, or any device that will give you pulses, you can measure that frequency and tweak the OVF values for the timers to match that value. it's basically like synchronizing two clocks.
can this circuit measure 10nH inductor?!
Unfortunately no resistance ESR meter, so it can't show ohm bad resistance components.
I'm working on this. Stay tuned and don't forget to watch the other vids on my channel too, in the meanwhile.
What is the minimum resolution of the inductor ？
The smallest inductor I measured was labeled 56nH 10%, and I measured 52 or 54nH from what I remember. I didn't have any smaller than that. Hope it helps.
Its only using nokia 3310 modul lcd