It's great to see someone on KZfaq producing constructional projects as opposed to all the teardown videos that the majority of KZfaqrs seem to produce, and some very useful projects to boot. Big thumbs up from me.

Simply briliant. Love the new case design and the pcb. I am intending to build this soon.

Lovely meter, perfect for the workbench.

Excellent work and very interesting, this is now on my 'to do' list. Thanks for all of the information.

I have recently come across your channel and love it. Love it for the completeness of it. I am yet to build anything but this will be the first one. Ordering parts next week. Thanks and keep up the good work.

Incredible review and explaination, excellent process. It is great that you update your projects too. You are like one of the prior greats in electronics, very neat and professional presentations, excellent documentation, great responses to your commenters, sort of Forest Mims.

An improvement in the Milliohm meter. Better and Better. Congratulations

Brilliant, very good presentation and brilliant ideas. Thanks for your nice update. A great encouragement for hobbyists.❤

Great work! exactly what I was looking for, even the 1st one was good.

I just finished building my unit using your design and the PCBs from OSH Park. Works really well! Thanks for the video!

Well explained! i hav no experience but you presented easy learning of this projects goal, components + where they go and what they do in the circuit! thankyou for sharing.

Thanks for the detailed video. I have just finished building it and it works well. Very impressed, thanks again.

Double thumbs up for your wonderful work. Hope you are doing well. Not seen any new videos in recent days.

It 's really interesting to follow yours profesionnal explanations . Thanks a lot

very much inspiring... I learnt how important it is for the end product to be presentable and user friendly from this project and I will definitely try doing this one! thank you so much Sir.

Nice to see you back! Neat upgrade, thanks for sharing.

Interesting project and thanks for the information. I think I'll build this one and try using it to locate short circuits.

Good to see you back on KZfaq. Thanks for all the great videos. Thanks.

Another great project...thanks Louis.

Good to have you back Louis!

Their designs are always perfect , eager to see the next video .

A very nice update video, thank you!

Thank you! I'm always waiting your new videos

Very nice video. This device has many useful applications.

Thanks Louis. Nice upgrades.

Very nice project. Thank you for share with us.

thanks for making these videos. I love them. I watch them repeatedly. Can you do a video on making a constant current dc load that a hobbyist could make to test home built power supplies. and maybe use it to drain batteries. Maybe 0-30 volt DC and 0-3 amp? Again Thank you for making these videos .I learn so much from you because you explain (very well I might add )the concepts and exactly how the components work. Your words are thought out well .You keep it concise without gibberish. Also a video on you would be nice to . Tell us about you background how you got started in electronics . Maybe a "show and tell of your lab" and all the instruments people might enjoy that too. Thanks again Rodney USA

Great T-Shirt Louis...great...

Much neater than the previous version and I like the tshirt!

Thanks Professor. Cheers, Mark

Hi sir, could you explain why you have used 4 resistors in paralel instead of 2 or just 1? Maybe to get a more accurate equivalent value and also to avoid thermal variances?

Smashing job sir :-D, slimmer and neater than the original, and still a very accurate tool. :-). That pcb is so neat, he did a good job didnt he :-D. Extra capacitors, catching the high frequency noise i guess, i still dont get the oddness that high value capacitors dont catch everything, but its known so a smattering of different value capacitors around linear regulators is stamped into my grey matter LOL :-D. Hey dont forget that youtube is a hobby, we dont expect you to churn out loads of videos, you have allready produced so many excellent tutorials/projects/teardowns :-D.

Just finished it and its working fine. I ordered the 1.4 boards by mistake but implemented the 1.5 changes. Geting hold of the 2V voltmeter (YB514B) was difficult to find in the UK. I could only get 200mV version. After a lot of mucking about you have to remove 2 resistors, RA and R1, the put a 100k at R1 and a 11K at R2. Then change the decimal point link to 2V. It should be 10K at R2 but I couldn't get the bourn pot to set it to 1.999 Volts. China seems to have a lot of 200V versions, suspect they could be modified the same way) I have 2 boards and 2 modified Voltmeters if anyone in the UK wants to have ago. (I also changed the 5V voltage regulator because the one specified seems to be either discontinued or a very long wait)

I am making a minor modification to clamp the voltage to 1.0V using ADR510 1v ref. My reason is that I plan on using this instrument to help locate power plane shorts on laptop motherboards. Since laptop VCORE is often 1v, I prefer to not approach 1.25 of original design. I changed the resistors to 4 x 44.2 ohms with the one above the pot to 56.2 ohms, and keeping the 100 ohm pot, providing a 10 ohm network, leaving the current as originally shown 100mA.

Louis and All- Another great video and project that I'm excited to make. The e-bay links in the parts list for the 4.5 digit high precision panel display are expired and I can't seem to find anything similar. Are there other vendors that may have something similar?

Beautiful build! would it be possible to add a small circuit for generating a variable tone? A tone which would go up and down depending on resistance. So that low resistance is a very deep tone, and the pitch gets higher as the resistance gets lower. So as you get closer to the short on a circuit board… The pitch becomes higher. similar to the “tone-ohm” device sold by Polar Instruments. Thank you for your input!

Hugs from Brazil.

Just assembled your design on the pcb and the meter reads -0.002 tried adjusting R12 but the display don’t seem to be responding. I heard a crackling sound earlier while soldering when the solder leads had to her some part of the pcb so I guess I may damages some IC but not sure which one.

Fantastic video and description. I’m wondering why you went completely analogue and not down the digital route since it offsets and adjustments could be compensated for digitally. I guess part of the answer is that you’re “doing it right”. I’ve just completed my own design and I’m really curious to see how mine performs against yours, since mine is a lot simpler! (And probably a lot less accurate)

brilliant!

¡Genial!

Excellent design and a useful meter. I just want to suggest a little improvement: As all resistors but the trimmer are 15ppm/c and the trimmer is 100ppm/c, it would be better to choose a low as possible value for it and still have enough room to compensate for the 0.1% tolerance of the other resistors. A value of 10ohm will be a good choice as it will greatly reduce the overall temperature coefficient of the whole array and also reduce drift due to vibrations. Of course the 63.4ohm will have to be changed to a higher value to complement it.

Seemed that the meter connections were wrong. Corrected it and now it shows 0.0000. I read a voltage 19.19v at the opamp and at pins 4 and 8 on the charge pump IC. is that normal ?

I would like to get one of this meter is that position to purchase?

Not sure if this was suggested but, if you add a switch and a resistor, you could use the internal voltmeter to calibrate the 100mA source, thus not requiring the external DVM.

If I were to build this, would it provide results comparable to the RS components 611-953 meter? Rhopoint, Model A210-091 Ohm Meter, Maximum Resistance Measurement 200 Ω, Resistance Measurement Resolution 100μΩ I am interested to know if building this would be cost effective as well. Gordon

A comparisson between the two different versions would have been great.

Great design, would it be able to connect this to the milliohm meter with Arduino nano in your other project.?

What is the range this milliohm meter can measure?

Louis, really enjoyed the project update, and especially the innovative use of the PDF drilling template. There is now an updated version 1.5 board available with only a few minor hardware changes such as a PTC fuse, larger capacitors in the charge pump circuit, and a 5 volt supply header for the panel meter. www.barbouri.com/2016/10/09/milliohm-meter-version-1-5/ Thanks again for the educational video's.

master job's

I want to build one to test some batteries but the ICs are hard to find now 😓

PDF Print Scaling issue. It appears that all your PDF files are produced with the "Print Scaling" setting set to 97% as the default. In Adobe Reader Pro, I have found that this needs to be reset (from 97%) to "None" (100%) to print at the correct size. I have noticed this on other project PDFs, for example, DC Electronic Load which also has the default Print Scaling set to 97%. Generally speaking, this setting is normally always left at the default setting of 100% when creating the PDF file, therefore requiring no further adjustments necessary to print out the exact size on paper. I am not sure which method you use for producing PDFs, but it seems that the default Print Scaling is always set to 97% during it's creation! May be worth taking a look at the PDF creation settings? These are exceptionally good quality videos and I applaud you for all the thought and effort that you put into these. I look forward to more projects from you in the future.

i want this full assemble circuit....where i can purchase this

Hi, I like new version, but why don't you use multiturn potentiometers with knobs instead of trimmers?

Nice thing about a meter like this is if it breaks you can fix it yourself.

Is this still the best DIY milliohm meter as the video is 7 years old

you could make a git repository with the design files. helps you to track the versions and people can maybe make suggestions

Excuse my stupid question, but do I get simmilar results when I take power supply, limit the current to 100mA and measure the voltage accross the resistor (4 wires) ? Just asking, whether its worth the effort to build this project. I would need it to measure resistances between 2 and 100 milliOhm. Thank you.

Hello. Very very nice job. Is possible measurements up to 9.9 Ohm? (Only change digital panel 4-1/2 (2V ) for digital panel 5 digit (10V)) I have a problem, OSH Park not sent to Spain. Thank you.

if you build this, note the BOM lists an incorrect part for R10. It should be 499K ohm not 499 ohm. This is per the schematic and the ina106 datasheet application note. This is an acceptable part for R10. www.digikey.com/product-detail/en/te-connectivity-passive-product/YR1B499KCC/A105891CT-ND/

very nice meter sir. Can it be measuring onboard component ? Thanks

No problem finding those hairline shorts on a new PC board now.

Please help Farnell part No. 9725717 not found. Can i use Farnell part No. 2519475 in its place.this is going to be my first project.many thanks.

Can I swap farnell No.9725717 not found on their website for farnell No. 2519475 as a replacement please

whats the point of using .1% resistor with a trimmer in parallel? 5% will do just fine

grand master 12v mppt battery charger pls

can I use farnell No. 2519475 please

Looks like OSH Park makes you order 3 boards. Anyone order 3 and have one to spare? I'd be glad to pay for it and shipping. Thanks! (I'm in the US)

I see a sticker, but NO t-shirt as of: 06/09/2022

The diet your on is obviously working for you. Stick with it...PEACE

Hi I miss your highly educational videos. Hope you are healthy and got through the pandemic well. vy73 de OE1MIS

grand master 12v mppt battery charger pls