BEST Homemade Two Hand Multimeter - Finally!

High quality PCB prototypes: www.pcbway.com
Project & PCB Here: bit.ly/49W2Cqb
🔥Arduino based multimeter capable of measuring current, voltage, resistance, capacitance, inductance, continuity, diode mode, frequency and a lot more. Still improving! Check the links for more.
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00:00 Intro
08:51 Thank You
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#multimeter
#homemade
#Arduino

[@benhetland576]

Great! This one you should sell as a kit, since it has a couple of components that not everybody may have laying around just by chance :-)

[@ELECTRONOOBS]

You think people would be interested into buying it and then solder it themselves?

[@BikramBehara7]

Can you sell your pcb soldered

[@benhetland576]

@@ELECTRONOOBS I think so, but don't listen to me. I'm terrible at judgements involving other people 😉 Maybe you get some feedback in the comments here that give you a better sense of the demand out there.

[@abdullahisanidodo2876]

​@@ELECTRONOOBS i think having two versions will do it, packaged and DIY

[@abuhafss1]

@@ELECTRONOOBS Yes, sure. The kit must include everything to make it finished tester, ready to use.

[@Marbslab]

Nice work. Perhaps you could design the housing so that the negative probe sticks out as far as the positive probe when the cable is wound up. This would make it possible to take measurements with just one hand. It would be even better if the distance between the positive and negative probes could be adjusted and fixed, for example when measurements are made on SMD components.

[@autonoob]

Cool. I would add female pinheaders hooked up internally to the probes. So you could easily connect it to a breadboard using regular jumper wires. And maybe a small magnet to hold compoments/screws temporarily.

[@zaprodk]

Great idea.

[@yitspaerl7255]

Thanks a lot for sharing this. I have ordered the PCB's and the resin printed enclosure. I see another application for this: Automotive use. I don't like putting my expensive meter under the hood of my car in a place where anything can happen to it. Then I have to measure and watch the probes, trying not to make a short circuit. At the same time watching the multimeters display. With your design I don't have this problem anymore. Of course there are pen meters on the market, but your design is much more versatile. Maybe automatic screen rotation is nice. Not only for left handed people. Replacebe probes, maybe. There is sort of a standard in this. A buzzer for latching continuity checks. Definitely I do not mean this as ordering features ;) . Besides I do realize that you cannot fit everything on such a small board. However I do know that I am going to enjoy building your project!

[@Gengh13]

What's awesome about custom tools is that you can customize it for your application. You can have your own beeping sequence for different diode voltages, you can add a dfplayer for sound readout or whatever you want.

[@benhetland576]

Now I can just imagine what kind of sequences that would be... Maybe a binary encoding of the value on the display? Or it could be beeping the digits using morse code? Could also beep the digits like they are shown on an abacus, long beeps for a 5 bead followed by 0-4 short beeps for the 1's.

[@Rich-on6fe]

Interesting project. I would consider putting the display as close as possible to the probe tip. Round the case edges making it comfortable to hold. Ditch the neg probe holder. Consider socketing the neg probe.

[@zaprodk]

Agree. Display close to the tip, the rotating switch in the back.

[@LokeshWankhede]

Your projects are getting better and better day by day and these genuinely interest me. You're my favourite KZbinr ❤

[@artursmihelsons415]

Nice! Best thing with DIY tools is that they can be tinkered to fit all needs.. 👍

[@jorgedelcastillo2811]

Buen trabajo, te ha quedado genial !!

[@Jackie-sg8es]

I’ve been waiting for this. And you did an amazing job. It is a very well done and finished project. Great work.

[@barrymayson2492]

I like it been looking for something like this as i often work on highly dense boards and with a desktop meter have take my view of the board to look it. This sometimes leads to me slipping of the probes. With this you can position the probe and read the meter looking at both. I have one suggestion make negative probe wire pluggable so it connected with different ones ie crokadile clip. But your products are becoming very professional thanks for your time and work.

[@hippie-io7225]

I love it when a good plan goes together! The switch idea is awesome. Circuit designers who are willing to go through several designs, like you, show passion and initiative. Good on ya y bien hecho!

[@pizvi]

i cant thank you enough good sir!! its been years of my search for perfect mini multimeter and my journey is finaly over :D ordering PCBs right now..

[@CJ-Giddyup209]

If there's one thing I could change about the multimeters I've had, it's being able to see the screen (usually testing 120v). Even with wrist straps it's awkward to look at the screen and hold the probes. With the screen attached to one of the probes, like yours, it could simply solve that issue. 👍

[@chiparooo]

Very nice design! A very useful tool. Thanks for sharing!

[@NilsRohwer]

Great work!

[@grins047]

Amazing! I really love your work. Thanks for sharing, you are a gem.

[@helmutzollner5496]

Love it! Well done!

[@ranganatennakoon]

its very cool step by step development ! nice work .

[@rodrigomartindelcampo9534]

Great project! Also this is a great example of the cases when custom solution is better than off the shelf, cool dial

[@tmiller9099]

Terrific! I wonder if the dial would last longer if the pogo pins were on the board and the pads where on the dial surface?

[@meatmanek]

That would also mean that the wear happens on the easily-replaced dial board instead of the main board with all your components on it.

[@benhetland576]

It also frees up some space on the main PCB, which can be used for some low profile components. The round PCB will rotate freely above without any pogopins coming down to strike them.

[@dinkc64]

Very cool project! The design is very nice and elegant.

[@mikeseba7817]

Another great project! 👌👍👍👍

[@alessandrovichi761]

Very good and cool project

[@etce10avijitdey95]

Incredible project. ❤

[@ManosMaragkakis]

That's a nice project man! Keep goin

[@teddyjamilonatefreire8797]

I think this is a very useful project. Great job! and thanks for sharing all your knowledge with us

[@louisbaldor4225]

OMG!!! super useful project, I want to make one by my own, thanks again!!!

[@padmanabhanrajesh2366]

It looks very professional.Great work bro

[@leehewitt9559]

Great project 👌

[@Isaac_Diggs]

Awesome work

[@SD4LABS]

Nice project! For the next iteration you could try using one of the newer ESP32 (ESP32-C3/ESP32-S3), you can directly upload sketch to it over the USB (no need for external USB to serial converter as it has built-in USB Serial/JTAG controller) and it also has built-in Wi-Fi and Bluetooth.

[@ftwproject658]

Handy project! Really like the compactness. A cool add-on would be a high voltage resistive/capacitve voltage divider nozzle to attach to the front of the multimeter. You would need to add a toggle switch for 'HV Mode' which would simply be a multiplier to the output on the led, making it easy to read high voltages. The nozzle can be quite long to allow for reading high voltages in experiments. The nozzle would be 'keyed' to allow for snug fit with the multimeter tip. Cheers.

[@HadjerBOUYAHIAOUI]

nice job , keep going!

[@AbhishekKumar1902]

loved it totally ❤

[@vishalkumar040393]

I thought the Dev Board was the best, but this next level. I will make this one. Nice work. Thanks! for sharing.

[@SweetLemon13]

Very good, bro, a hug from Brazil.

[@LeonZhou-gi5rq]

Great! I plan to make one.

[@jozefnovak7750]

Super! Fantastic!

[@TheDarkGunner100]

Using the bluetooth functionality one could stream voltage measurements to the phone and make a crude oscilloscope. Pretty nice to see the rough shape of the voltage or dropouts etc in a pinch!

[@user-qf6yt3id3w]

I like the home made rotary switch.

[@mostrush4849]

I would add indented text of modes to case and fill them with white ink. I would also add auto power off and add extra off step to selector like other multimeters (having to off position on start and end of selector is ideal) and remove side on-off switch. I also like to have ESR meter on capacitor mode.

[@levieux1137]

Nice work! I'd definitely add a buzzer to test for continuity (and one that reacts fast so that I can search the pin of an IC a track routes to). And I'd go above 1M ohms because with voltage regulators and low currents these days it's quite common to find values a bit above that limit. It's nice that the display updates quickly. A calibration mode/button would be great, to reset the zero and cancel wires resistance / inductance. Maybe you should sell it as a kit!

[@ELECTRONOOBS]

It already has a buzzer and LED for that

[@levieux1137]

@@ELECTRONOOBSah sorry, I hadn't noticed it!

[@Poult100]

Excellent! 👍👌

[@hakim_mi]

This version is really good, I’d try to order this

[@metalazzo]

Nice work 🙂

[@harikamalakarreddydarapu7410]

Excellent

[@akashpathave8985]

Great Video sir, Your My inspiration for Doing Graduation in Electroncs.. Thanks

[@abuhafss1]

Very nice project. BTW, you should have added option for testing zener diodes.

[@winlose3073]

very nice idea! I can't think of any other ways of making it better except if you could make it more slim that would be cool. Keep going.👌

[@kreynolds1123]

I love it. Just one concern about the leads and the degree that they bend when it is wrapped up. High degree bends can weaken and break the wires in leads.

[@stevesousa6810]

There is only one problem. It is only possible to give one like, I wish I could give you more. Well done

[@jimbarchuk]

Outstanding project! Through-wall mains wiring detector.

[@benhetland576]

Perhaps that's just a firmware update away since it already has a hall sensor.

[@malkurju]

can the display be inverted to be used on the left hand aswell? really nice job well done!!

[@jimsubtle886]

What are your thoughts on the longevity of those pogo pins contacting your PCB many times? Do you think just asking for a large copper weight on the pads and then using a long lasting lubricant to outlast the lifetime of the tool? Gold plated pogo pins are great, but once that plating wears off, there might lesser consistent metal inside that is either very hard or very soft. I have had quite a few cheap multi-meter PCB traces worn out this way. Please keep going, awesome project! I love the progress so far!

[@user-xb5zu6zu7j]

Nice project. Its a dream multimeter. You should make it as a product.

[@jparky1972]

Looks great! I don't know if you have it already. But a buzzer option on continuity would be very useful.

[@ELECTRONOOBS]

It has a buzzer and an LED

[@zaprodk]

Add a function that reads resistance as a tone. Then you can look for shorts without looking at the display. A different resistance is very easy to "hear" @@ELECTRONOOBS

[@benhetland576]

For those that wanted a "thumb wheel" access from the side of the meter, I suggest only a slight modification. On the main PCB offset the position for the mode selector wheel to one side a little bit. Maybe "down" when viewed with the PCB text upright (the display to the right) is best to reach the thumb. The opposite side can now be a straight edge for both the PCB and the case. Make an opening in the case where the wheel protrudes. On the top wheel cap, let it go around the outside of the PCB wheel, but also make the outside a cerrated edge. It will serve as the thumb grip in the new side opening.

[@unhappyalienbrocker]

Great work! Try (?) to add a switch to reverse the probes (for diode measurement)

[@luisb.458]

Gran trabajo.... impresionante.

[@RdGear]

Nice video .

[@iuhere]

wow really nice one

[@user-zr5rh9zv9h]

wow... that is amazing you insfired me thx

[@JonathanDeWitt1988]

Another interesting project Andrei. I wonder if there would be any improvement with a version that uses the barebones ESP32 chip. With its built-in Bluetooth it would probably at least eliminate the need for the external bluetooth module. Granted that is probably more trouble than it is worth given how much work you've already put into this version.

[@bigboykris2630]

That's awesome

[@yetanotherdan]

I like this project a lot! I wonder if a sonic screwdriver (or pen light) style of multimeter can be made with the selector knob being at the base. I hope you get to a point you can sell kits of this.

[@innocent1.]

Wonderful 💝

[@widyahong]

Add esr in capacitance measurements and oscilloscope on voltage reading 🔥

[@jazekerxx7535]

@Electronoobs it's becoming better and better, very nice! what would i add? maybe you could add text with youre fiber laser? also it would be nice to see how the accuracy compares to youre Keysight multimeter..

[@ELECTRONOOBS]

Accuracy is pretty decent especially for voltage and resistance using the 16 bits ADC

[@benhetland576]

@@ELECTRONOOBS Actually having some form of calibration ability, like the older multimeters had internal trimpots, would be a nice future feature enhancement. It doesn't need to be accessible from outside the enclosure.

[@benhetland576]

Another way to calibrate could be via the USB serial. Procedure and correct values could be prompted to and read from the user that way. Calibration parameters could then be stored in the internal EEPROM.

[@clive4500]

looks really good I would have the rotary switch with course pattern on the edge of the wheel so that it could be changed with your thumb I would get rid of the top part of the knob on top the top of the rotary knob could be within the case with cutouts to show the functions the fuse needs to be replaceable even if it has to be a bit bigger. and for sure the battery needs to increase in size that one looks really small.. Just some suggestions to what looks a really good and useful meter

[@sudheerkumar5966]

Great vedio sir

[@yitspaerl7255]

The PCB's and the resin printed parts have arrived and are beautiful. So I only have to order the parts Is it my fault that I miss the STL file for the dial cover?

[@rodrigofigueiras3027]

Realmente esta muy bueno, desde la solución con el dial hasta la carcasa que retiene el cable y la punta. Le faltaría poder ver señales de baja frecuencia tipo osciloscopio y estaría muy bueno también recibir las mediciones en la pantalla de la pc o celu con bluetooth. Esto veo que lo usan mucho los KZbinrs que hacen contenido como vos y muestran las mediciones directo en pantalla si necesidad de cámaras que muestren los valores. Vas por buen camino... Exitos

[@rodrigofigueiras3027]

Un detalle más, en la carcasa hace marcas de cada paso que da el dial y si podes algún símbolo que indique que estas midiendo en relieve. Son detalles que lo harán ver más profesional y completo.

[@rok9526]

Great project! I think buttons for switching modes (dedicated button per mode?) would be mechanically more robust long-term.

[@Circuit42]

Great Project Evaluation. But U can use a Magnetic Encoder for the Mode selector

[@Wasgehtnab]

its like the POKIT Pro, nice

[@dougaltolan3017]

Even though you don't use this for high voltages, I'd recommend a switch that connects the battery to either the charger or the circuit, but not both. Sure, you can't charge it while using it, or run it from a charger, but you'll prevent the almost inevitable unintentional short circuit via charger and power supply for the circuit you are testing.

[@MichalKottman]

This is very nice! I always wanted to see the voltage right next to the point I'm touching, especially if the contact point is very small. Having to look away to a "real" multimeter for a readout is very distracting.

[@labiadhchokri2124]

nice project , does this meter show the polarity of a voltage , you can add oscilloscope mode and logging mode and the min and max voltage , for the scope u can use your phone screen via Bluetooth .

[@saduniwathsala]

Nice and excellent 👍👍👍. Go upgrade and make it slimmer 👍👍

[@stm32user]

Super.

[@TheRcEngineer]

Hi Thank you for sharing. The stl file of the dial cap is missing only the lower part is in the stl files.

[@zewarmdur9195]

Well that is great thing to have tbh my multimeter wires are really annoying too they always get tangled so i hope you finish this one . Because i might buy one tbh ... what would i add if could be well the case u made is kinda big like if u use it like pen i mean at least the width of it not thickness + that would be really good if the negative wire was recla retractable after u let go of the negative wite or maybe something like old phone they were like spring will get smaller and + if u could have like plastic tip to put at the tip of the positive tip like pen tip case after all its really great project I love it how compacted its well done brother 🙌🏿👏

[@TechwithStefan]

Hello, this is a very nice project, and I can give you a free advice, since it should be a 2 hand multimetter, it would be great to make the Dial for changeing modes into a wheel , that you can change with your thumb, so that you can change faster what you need to measure. Similar to a Jog dial that previous phones had like the old Sony or old Blackberrys. Let me know if this makes sense, PS: foarte misto proiectul :)

[@youtubasoarus]

You could make it so the wheel is actuated by your thumb (thumb wheel?) so you can change modes with one hand.

[@inoid724]

Geat work, is there an ESR Meter included? This would be awesome.

[@GoatZilla]

uh, kind of seems like the pogo pins should go on the static base instead of the dial. that way when they wear a track in the PCB... you can just replace the dial instead of wearing a track into the base.

[@capkenway]

typec instead of microb would be nice, also it can also act as a oscilloscope if it does serial over usb and a have a program to make sense of it. a very interesting project though

[@musaadejoshuaibuopaluwa1712]

awesome

[@Kmnri]

Amazing project, what i would do... use esp32 since you already have bluetooth module, so why not just use wroom32 which is a lot faster, has built in BLE, way more processing power and could probably make entire thing smaller.

[@ljbengineering1163]

Nice device! I looked at your schematic. Can you elaborate more on how the arduino is measuring capacitance? Thanks!

[@ELECTRONOOBS]

Everything is explained here: electronoobs.com/eng_arduino_tut84_2.php

[@mrruvs5132]

All your projects are great. And I have a question, why are you still using the Micro USB connector and not changing to type C, regards

[@ELECTRONOOBS]

Is kind of big and don't need it for this project. For other projects with more power I did use type C...

[@JimmyCall]

Could the power switch be too fragile?

[@tonyxforce]

Why not use an esp32 for both main MCU and bluetooth?

[@diegogarciamedina6363]

great project, please add inductance measurement

[@ELECTRONOOBS]

It has. Check the previous tutorials to learn more on how to measure it!

[@xboxgamer9216]

How is the accuracy of ads1115? do we need to adjust for any kind of offest or errors at specific conditions

[@ELECTRONOOBS]

Ie easy to calibrate just by touching the probes when you calibrate it it will find the offset

[@94HellGate]

you should switch the dial housing to be on the outside instead of the top so you can do 1 handed mode changes

[@tenlittleindians]

I just got a tiny pen multimeter from AliExpress for $8.00 dollars and it's got more features than my old full sized multimeter!

[@Xen_Prime]

Does your schema include optocouple? Or fuse is just enough ?

[@ELECTRONOOBS]

It'snot rated for high voltage so a fuse is enough for me...

[@nadiaplaysgames2550]

could you have a logic sniffer mode? ill love to be able to probe for finding RS232 I2c spi and neo pixal lines plus a header for being able to sniff those data lines. with those modes print out data to PC console for logging and mirror it on the display

[@nadiaplaysgames2550]

follow up as well small buck boost converter with both current and voltage regulation so you can power up a hall effect sensor in a Ebike hub motor for example or any small sensor