Homemade Digital Electronic Load | Multiple Modes

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🔥This is a second version of the electronic load. This version is digital and has modes for constant current, constant power and constant load. It will measure current, power, voltage and print everything on the screen. Easy to control with a rotary encoder.
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Tutorial: electronoobs.io/
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Code: electronoobs.com/eng_arduino_...
Test video: • Electronic Load - Patr...
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#Electronic
#load
#Homemade

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27 июн 2020

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Комментарии : 230

@ELECTRONOOBS 4 года назад

Sign up at ELECTRONOOBS.io: electronoobs.io/ Follow me on FACEBOOK for more: facebook.com/Electronoobs help me on Patreon: www.patreon.com/ELECTRONOOBS

@grodiosp8916 4 года назад

Why do u put a banana in all your videos???

@mubbashirshirazi3758 4 года назад

hey electronoobs it would be a good idea if this project can be used to test the capacity of 18650 batteries by measuring how much current it delivered for a certain time and than display results in the end please please make another version with this improvement

@lexander9686 4 года назад

What's up with the Q&A

@boonematias4131 2 года назад

i guess im asking randomly but does someone know a method to log back into an instagram account?? I somehow forgot the login password. I love any assistance you can offer me.

@elliottdaxton7930 2 года назад

@Boone Matias Instablaster =)

@ultimateworkshop2000 3 года назад

Good job, one of the best assemblies I have seen for modules of electronic load, this simplifies it a lot for noobs, but the code is missing some features to complete a prefect job: 1- Set end condition i.e. voltage in order not to destroy and deplete batteries under test. 2- Total capacity in mA or A for batteries testing. 3- Total consumed power. 👍

@lexander9686 4 года назад

17:05 i like the fact that it's only V1.0, so there is still a chance of development.

@hemantbabel4279 4 года назад

Man you are my favourite ❤️❤️ you come up with something unique everytime.

@Catstorm99 4 года назад

Perfect timing...I was looking for one until I saw how much they were. Might build my own now. Thanks for your content.

@ahmadmaaz2566 4 года назад

As always, the bestest video ever.... Can't describe in words how much i was waiting for this video...awesome work dude

@keithking1985 4 года назад

love how alot of the way you get your readings are like how you do it in your DIY multi-meter..

@ELECTRONOOBS 4 года назад

Yes, is kind of the same sometimes

@mik310s Месяц назад

I just finished this curcuit it works great, thank you kindly electronoobs :)

@keithfetterly4111 4 года назад

As always, outstanding! Keep up your amazing work.

@ELECTRONOOBS 4 года назад

Thank you!

@LitesLAB 4 года назад

Excellent project! Very useful in a lot of cases!

@Mangomesh 4 года назад

I love it. Your videos are very inspiring. thanks again!

@AngeEinstein 4 года назад

I'm glad you exist since I definitely can't afford commercial versions of this

@ninadtaralekar 4 года назад

It's really nice device and the packaging has made it really professional look

@lexander9686 4 года назад

Great, im gonna collect the components tomorrow. Thanks

@electronic7979 4 года назад

Excellent project 👍

@Atif_gammer 4 года назад

Very nice project. Thank you sir.

@harikamalakarreddydarapu7410 4 года назад

You are awesome and always your projects are brilliant

@ELECTRONOOBS 4 года назад

Thank you very much!

@Guru_369 4 года назад

Awesome video as usual 💪🏽

@ELECTRONOOBS 4 года назад

Thank you very much!

@checkm8606 4 года назад

Looks great! Next semester I will start to study electrical engineering:D

@ELECTRONOOBS 4 года назад

Welcome to this world. Good luck :)

@sameerUNO10100 4 года назад

Dope video mate

@aurthorthing7403 4 года назад

Oh heck, I missed the other one you built. I think I can handle building that first one. Thank you.

@pinoyenginerd1091 4 года назад

Nice , i will also use this idea for my project.

@desmondhow343 4 года назад

It's so cool I try to make one for myself. Good video.

@ELECTRONOOBS 4 года назад

Thank you. I hope you will make It!

@gizmoguyar 9 месяцев назад

This is a sweet project. My only concern is that of response speed. It's probably not a big deal for the vast majority of use cases, but I could see some situations where an input voltage changes rapidly. That could cause a large current surge that could brown out the supply, or cause strange oscillations. For example, in constant power mode, if a supply rapidly switched from low to high current, this load may not be able to increase the resistance fast enough, overloading the supply. Or in constant resistance mode, a reduction to half the voltage will momentarily continue drawing the same current (half the resistance). I think this type of situation is rather unlikely. But it should definitely be kept in mind.

@dominikworkshop6007 7 месяцев назад

This problem was a deal-breaker which stopped me from using this design.

@Circuitoptimize23 4 года назад

One of the best Arduino project. Thank u for sharing...

@walidebdelli1046 4 года назад

Very good, thank you for the video

@atec9228 4 года назад

Sería estupendo un diseño en PCB en vez de tanto cable y placa de prototipos. Magnifico video.

@mubbashirshirazi3758 4 года назад

very very great project i made the previous version of this projet and and iam willing to upgrade it

@EasyOne 4 года назад

Nicely done

@neerajchhajed 4 года назад

Amazing explanation

@alexe7376 2 года назад

I did the similar project 2 years ago. I used INA219 as a current sensor together with 0.1Ohm sense resistor. It more accurate than ACS712, has I2C interface and 0.1 resistor produces less heat.

@widjisantoso3074 4 года назад

Did you read my mind? I just looking for this stuff 👍🏿

@user-gw1pj7fh7q 6 месяцев назад

Спасибо большое что делитесь своими опытами 👍

@homoevolutus 4 года назад

Can't wait to build one! Sometimes it's best to order the parts right away before watching the whole video and deciding a project is too complicated. Not this time!! Also, XD @5:56

@lexander9686 4 года назад

Thanks for the advice.

@ranganatennakoon 4 года назад

nice project i love it

@neerajhebbar7313 4 года назад

Your Videos are love 🥰

@Zloy_nub 3 года назад

11:05 , don't put mosfets in linear mode in parallel , drain-to-source resistance changes as mosfet heats up, but they'll not heat up equally even if they're mounted on the same heatsink, you'll get cycle like this until one of the mosfets burns : higher temp => lower resistance => more current = even higher mosfet temperature, so eventually current rated for all mosfets will pass only thru one mosfet you can put them in "parallel" if you read the amperage, and control their gate voltage separately but anyways, cool project :)

@anonymoususer900 4 года назад

It's awesome broooooo

@leslie1764 4 года назад

I love how they say get your PCB for $2 and don't say plus the shipping 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️

@raagamparmar179 3 года назад

yeah....LOL! It sums up to the same price....slightly lower than others.....

@MarterElectronics 3 года назад

Shipping can be low as 5 dollars or 20 dollars. It's better than first having to pay 170 dollars for a 4 layer pcb and then 22 dollar shipping.

@victoriaemily6554 4 года назад

You are the best for me.

@widjisantoso3074 3 года назад

Error = setvalue-actual Pwm = pwm+ error I just use this for the pwm compensation and it's work very well and very stable

@Lifeofdiy2020 4 года назад

Great video

@atec9228 4 года назад

Me gusto mucho este proyecto, vas a compartir los ficheros para poder hacer la pcb y modificarlos?? Gracias por este y otros proyectos tan interesantes. Un saludo.

@Happiness50057 2 года назад

pls add battery capacity tester feature

@ATLaboratory 4 года назад

Very very nice the all project! Also the case and the menu:) but I'm not sure the MOSFET is properly driven by the DAC. You should use an OP-AMP stage. I know it is not that easier to get also resistance and costant power!

@mehdik348 Год назад

Useful for me thanks you

@siddharthmali5841 4 года назад

Excellent.

@DPTech_workroom 4 года назад

I need one!!! And I will be do it someday.

@edindelic4841 4 года назад

Have you checked stability of the system? Especially op Amp driving a mosfet tends to oscillate under some circumstances. Adding some caps in the right position could increase your phase margin of your system.

@dominikworkshop6007 4 года назад

This electronic load is cool, I like it! I wanted to build a very similar load and because I had some problems I didn't do it, but now that I've seen this video I plan do start building it, finaly :) But I would add more power MOSFETs to share the load, because MOSFETs with great SOA (safe operating area) are expensive, and if you choose a MOSFET that isn't designed to work in it's saturation region (where it dissipates a lot of power) it might damage over time.

@ELECTRONOOBS 4 года назад

Nice. Let us know how your project is going! Keep up!

@dominikworkshop6007 7 месяцев назад

Update: I finally built my load and recorded a video about it on my channel. I know it took a while, but I made sure to resolve all common problems found in most DIY designs.

@elektrocat8681 4 года назад

Can you make a tutorial about how to make an audio power meter? It should be a pretty similar project but with AC instead of DC. You make awesome videos :D

@JakeJoris 3 года назад

Made it, works great. The only issue was that the current was stuck at -500ma, but I resolved the issue by flipping L- and L+ around.

@jdev999 2 года назад

On mine the current showed a negative value, also had to swop L+ and L-

@fabiomatys Год назад

Very nice project... In the next version you can implement one PID controller...

@lezbriddon 3 месяца назад

1ohm is maybe a little high (voltage drop to connected equipment) simple suggestion for a bigger/better monster v2..... mosfet x3 to share the heat 0.1ohm (10x1ohm parallel less heat/less value drift so more accuracy) tl072/358/741 opamp to multiply small currents before adc (switchable? 1x 10x etc) less ugly display option, small but pretty oled ones are like $8 sdcard logging......

@anunyvape7808 4 года назад

You are the best

@abzaman77 Год назад

A Watt-hour counter and an automatic voltage cutoff feature would make this perfect I believe.

@circuitdesolator 4 года назад

Next version could be voice controlled. Add some mic with tinyML on MCU and say the command "Set CC at 1A" 😁 Awesome work. Keep it up 👍🏼😊

@sasazenny1750 4 года назад

thats a great project hope you build a li ion balance charger and discharger its already quite similar to this project

@DIYwithBatteries 4 года назад

That was a nice circuit Dude! 😍 Might be useful for a capacity test for 18650's.

@ELECTRONOOBS 4 года назад

Thank you. They should be interesting to test

@DIYwithBatteries 4 года назад

@@ELECTRONOOBS Yup! 🤟

@lexander9686 4 года назад

@@DIYwithBatteries you have a cool channel too.

@RK-dp9fe 4 года назад

I was thinking the same think. If yoy can make it count the mAh, time and ad a cut of voltage it will be great for 18650.

@prussian7 2 года назад

I was going to make an old fashioned resistor box. But after watching this I am re-thinking that.

@AlexKite68 4 года назад

Great!

@danwattaliyanagekalanaprem724 4 года назад

Great video....if you can do a video on switch mode supply and its theory..(how to make a smps at home)that would be great

@mhzxtal6665 4 года назад

I am your pateroner, very happy to see this kind of project. It is very useful and you have fully utilized the microcontroller using a good example and best coding way to produce the user friendly features. I love it !!!!! I am your fan haha. Previously, I asked you question and you was responsive to answer my question on pateron chat. I was doing the smart watch project the latest version. But I realized that using the ATmega328-MU the footprint is difficult to solder, I try many best way to solder this and apply the flux to ensure solder paste can properly isolate and solder tightly. I keep trying more than 6 times to program the MCU but stii failed. I read many videos how you burn the code in a blank chip. But I am going to re draw the PCB and change it to ATmega328-AU, i guess using the larger size of ATMEGA328-AU then I can only successfully. Anyway, I really like your project so far. Hope you keep on post more, stay healthy and safe during this period. God bless you.

@ELECTRONOOBS 4 года назад

Thank you very much. For the small chip, do you have a hot air gun? Using a lot of flux it shouldn't be that difficult. And yes, the au version is a bit easier to solder because you can see the pins. Keep up!

@mhzxtal6665 4 года назад

@@ELECTRONOOBS yes, i used heat gun. I properly to solder and apply the flux to ensure the isolation for each pins. I am not sure why still failed to download the code. I also follow the several video to burn the bootloader. Nevermind, i will keep trying out and let you know once i success to make it.

@ahmedsoliman4209 4 года назад

I would suggest to start using the STM32 breakout boards for your projects, since the Arduino nano and uno limits clearly start to show up for advanced ones like this one, and it makes you take more time and waste more money on fixing them while you can foucs that on the project making it better, I but really did enjoy watching that build, it was quite the improvement form the last one and more unique not just a circuit that you found on the internet and copied.

@TheJay6621 4 года назад

Banana got his terminals. hahahah Nice work.

@makkam7575 4 года назад

Amazing video as always and nice job on the exterior but at 8:49 it's not 0 to 4096 as in the case of the arduino it's 0 to 255 not 256.

@barry2718 4 года назад

Great build. Liked all the explanations and problem solving along the way. I would suggest you raise the 1 ohm 5 watt resistor above the protoboard to prevent burning of that board at full current. An excellent build

@NiHaoMike64 4 года назад

When drilling into a heatsink with heatpipes, make sure not to hit the pipes or the refrigerant will escape and the heatpipe won't work. (If you noticed a hiss and a funny smell when you were drilling it, that's what it was.)

@ELECTRONOOBS 4 года назад

You're right but in this case, this old cooler was not filled with refrigerant. It's just filled copper tube.

@atec9228 4 года назад

También sería interesante que subieras el propio fichero easyeda para poder hacer el pcb. Un saludo.

@AndreasA.S. 4 года назад

you should really look into ferrules for things like the mosfets, solder on a hotpoint, ripe for failure

@isaacsimon6863 4 года назад

Awesome! This is really cool! in V2 can you make a PCB? maybe smaller too? I would love to have one on my desk! also, I've become a very frequent commenter. if you remember me, I'm sorry for causing so much trouble with all these questions! I love your youtube channel and you are one of my favorite RU-vidrs along with GREAT SCOTT! I love you guys and I REALLY think that you guys should meet each other and you guys could have some AWESOME ideas. A collab would be AWESOME!!!!

@ELECTRONOOBS 4 года назад

Sure! I have a PCB design but is not ready yet!

@Guru_369 4 года назад

Bro need more video related to power electronics...

@volkerraum3494 2 года назад

Hi, nice Project, I just stumbled about one thing. GND of Sense is directly connected to the common Ground.In case you connect Sense GND and Input GND directly to your power source then the sense GND wire will also have to carry a lot of Amps resulting in Voltage drop over the wire? => Depending on the "thinkness" of the Sense GND wire, the measurement might be impacted less or more. Shouldn't Sense be measured in a differential manner?

@cwbh10 4 года назад

Also, I think running MOSFETs in parallel as suggested by running them in the linear region could be non-ideal since the different manufacturing tolerances would make them difficult to control in unison

@fellpower 8 месяцев назад

U can fix that very easy by splitting the gate voltage to extra OP Amps - and get that "Gate Voltage" from the MCP splitted to them. Every FET needs his own Shunt - and all is fine

@lucianungurean 3 года назад

Great project I already made your project . Also some minor modifications . I saw that it couldn't get to higher currents due to the 1 Ohm resistor . basically your dropping way too much power on the resistor . I put a 0.5 ohms and arrived at 4 Amps with Just 1 Mosfet . the Idea is to ad a standard Shunt so all the power can be dissipated on the mosfets . I already made a 400Watt DC Load using the same ADC and DAC with adruino with1% accuracy . but my problem is that i could never understand how to make a Menu . I'm hopping that I could use your Code and modify it so id have a more extended functions . Beautiful Project

@Omesh.K 4 года назад

Nice...

@1996misterio 4 года назад

Ostias colega ... lo haces mas grande y no te cabe en casa, podría ocupar una cuarta parte de lo que te ha ocupado a ti jajaja

@oktemee 4 года назад

Good job! I have a question though. With the analog version there was an op-amp at the input of the FET in a feedback configuration. This time the DAC drives the FET directly without any feedback configuration. How do you know the FET drive voltage for a specific amount of current. Is there a digital feedback control?

@jaroserafin9606 4 года назад

Very nice work. Any possibility to run this device in higher load?

@ethzero Год назад

When you need to air-cool your MOSFET to Absolute Zero, giant heat sink + fan 😂👍🏻

@franzhagemuller6413 4 года назад

Maybe you should consider calibrating your oscilloscope probe... Otherwise great video!

@mubbashirshirazi3758 4 года назад

@mar24n35 3 года назад

Hi. Great tutoral and i had replicate one using the schematc all work greatl, but if i setup my power source to Give i.g 5 amp a setup the load for 2 amp or something , is drain8ng always max 1.2 amp. From 0 to 1.2 amp setup on the load all works great but any think over is always showing 1.2 amp drain. Is that mofset averhited or something alse? Thx

@nishantwadkar6675 4 года назад

Hii, I enjoy n used many of your project for diy. Can you show how to build 4 to 20 ma source with lcd indicator. Digital or analog. Need to simulate sensor values.

@atec9228 4 года назад

Hola, el esquemático cuando lo descargo luego no se ve bien. Podrías subirlo en Google Drive o algo así para poder imprimirlo y así montar mi unidad de carga electronica. Gracias

@jazekerxx7535 4 года назад

hi, nice project. i built the previous version too. the only thing i don't like is the resistor because of the voltagedrop, so thanks for the alternative component ACS712. why don't you use a opamp to raise the voltage of the ACS712? i want to use this for building a power supply from an ATX PC PSU. i only have one lab bench power supply and sometimes need more voltages so this will be my second power supply. it wil have 5 dedicated voltages (3,3 / 5 / 12 / -5 / -12 ) with adjustable max current (for the positive voltages), and a voltage and current controlled output. all with volt and ampere meters. and at the bottom some usb connections for charging. if anyone interested in this, i made the frontpanel in tinkercad (search for ATX PSU Bench power supply)

@jrausa1 4 года назад

Hi- Thanks for posting this. I’d like to build it, but I have one question. The link you provided for the fan looks nothing like what you actually used. Do I need to get a heat sink and fan separately, or are they available as one unit? Can you provide additional links if necessary? Thanks again.

@machmanish1 3 месяца назад

this is a great project. I want to know, how you made variable resistor for resistor mode?

@cwbh10 4 года назад

Why didn't you use PWM on the gate of the mosfet so that you could dump the energy into a passive resistor and keep the MOSFET out of the linear region?

@EdwinFairchild 3 года назад

if you PWM the mosfet would the load also see a PWM signal, and what is wanted is a constant signal, efficiency is NOT wanted in this case if the point is to stress the load...as far as i can tell

@stevencraig 3 года назад

Hi, can you elaborate on what you mean here? Specifically where the passive resistor goes

@sajidmohammad3190 2 года назад

I wanna make the Fan Temperature Controlled...At which 🌡 the fan should turn on and at which 🌡 the fan should run at full speed?

@PortraitArtPhoto123 2 года назад

What would be the best way to build this for higher loads? I have 30ah 12s 50v lipo batteries I need to discharge after to work to storage voltage. So that like's 1500 watts at 1C. Some have said driving multiple MOSFETs could be problematic. Would it be more efficient if that actually fed a bank of high-power resistors?

@relaxingelectronicmusic775 3 года назад

like cool..

@randycarter2001 4 года назад

A word of warning. If you use this device to test batteries, add a cutoff relay. Batteries are never off. If the MOSFET shorts out (most likely failure mode) bad things happen like fire.

@ELECTRONOOBS 4 года назад

Thank you for this great tip!

@bitsurfer0101 4 года назад

Maybe add a current clamping circuit?

@randycarter2001 4 года назад

@@bitsurfer0101 No circuit is going to protect this device. What would happen if you're load testing a battery and the MOSFET shorts out? The full current of the battery will start surging through and begin heating wires and other parts to the point of ignition aka FIRE. Either you need a fuse or a relay in series with the battery to shut things down in the event of catastrophe. Don't ask me how I know! A relay has the additional benefit of completely opening the circuit at the end of your battery capacity test.

@bitsurfer0101 4 года назад

Randy Carter What are your engineering qualifications? Have you designed a similar circuit?

@adeshkumar5534 3 года назад

is there any voltage limiting factor here? actually i wanted to test my lithium ion cell using this...will it work for such low voltage of 3V?

@giulianoLP2505 4 года назад

Question: Why not a INA family current-shunt monitor?

@chethanr7670 4 года назад

Please make Arduino programming detailed tutorial love from India♥️

@RMquickbit 3 года назад

Can you simply parallel the mosfets without any other modifications?

@hornos27hotmailcom 4 года назад

Hi ELECTRONOOBS You can make a circuit with AS5600 how it works and how to program it I2C? Thank you Greetings from Colombia.

@BeetleJuice1980 4 года назад

Great, can you add mAh to the code to measure capacity?

@tonysfun 4 года назад

Thanks for your videos! How soon are you gonna have the updated version?

@ELECTRONOOBS 4 года назад

Not sure...

@tonysfun 4 года назад

@@ELECTRONOOBS I like to make one, but I don't want to shortly after that start fixing it.... I'll hold on until I buy pro version, that can be as soon as August, than I'm not gonna make it at all.