Another case of china getting there greasy paws on some one others design and stealing it.

Such a pretty good and complete explanation regarding electronic DC Load. Thank you very much.

I just did a price on the IC's only and the cost is $42.30, Add another cost for the remaining parts say $20.00 brings the cost to $62.30 , w/the pc board another $10.00 the cost is $72.30. I went on Ebay and found a milliohm meter w/leads for $44.14 w/free shipping. Why build your milliohm meter when it is less expensive to buy on Ebay?

Where did you get the leads for this meter?

What a lovely piece of kit! I love the case! But there might be problems getting it since a lot of British sellers don´t ship to Germany anymore. I understand why but it´s a crying shame that all of that went down. Do You ship to Germany? I think I´d like to get the kit to assemble myself, how much would it be, compared to a readymade solution? Kind Regards

Hellò Master! I mounted the pcb and it seems that most of the system works, but there is a problem, the RTF4050 reference voltage generator instead of providing a positive voltage provides a negative voltage, before removing the SMD chip, I would like to know if it is a problem with the chip setting or if I damaged it while mounting it? I looked at the data sheet but I did not find any ideas on the matter. I would like your opinion, the rest seems to work correctly. Thanks!!

Are you still around? You haven't made a video in 6 years.

Hello, I really liked your project. I have the following question, can it be done for a range up to 100v and 20A to work, the idea is to discharge battery packs up to 24s.

This video is quite old now. Back then you didn't have PD capable USB chargers. You had to use a transformer and bridge diodes! Now days you do and they are super handy for powering projects! I use a PD 3.0 or 3.1 trigger module to get the output voltage I want. Any PD 3.X charger will provide 5v, 9v, 12v, 15v, 20v and 28v (PD3.1). This will power just about anything at 5 amps max or less. 100% of my small projects use a PD 3.x trigger board instead of a dedicated power supply. I have BT speakers that I converted to PD 3.0 power from micro USB. What took many hours to charge at 5v and 1 amp boosted to 8.2v now charges at 8.2v and 5 amps. What happens after PD 3.x enters your device, like needing 5v or 3.3v, is done with linear regs or small DC-DC. I power my o-scope, cameras, tracker, battery testers, load tester, etc all on trigger boards and PD 3.X capable USBC wall bricks. Many of the multi port versions negotiate each connection independently. A single 4 port USBC charger can be charging my phone at 15v, powering my tracker at 9v, my load tester at 12v and powering my scope at 20v all at the same time. One power supply source that covers just about everything!!! Sometimes the output DC isn't super clean, but that's easy to resolve with an electrolytic cap on the trigger board.

Is this unit work without RTC

If you have a Voltage ref with a temp coef of 1ppm, maybe you can cancel that out with some other component with a -1ppm temp coef, but that can get expensive and time consuming. (there are deadlines to meet, etc)

great to here that Louis is doing well. He was such a generous man for donating his time and knowledge. I learned so much from him and was able to build the DC load with his easy to follow tutorial. I use it regularly and I'm very proud of it. The YT community owe him a debt of gratitude and I'm so thankful for the time he was able to share with us. Rock on Louis!

What about adding a SD card for logging your position time etc as well as a temperature controlled or oxx CEO time reference Crystal to create a basically a GPS discipline Crystal oscillator all in the same design

I've built this too and loved every step of it. I just wish the world had more selfless people like Louis Scully. I miss his tutorials.

GREAT video with detailed display of project configuration (white board) and through explanation of the software. Question: Other than size can another Arduino be used? Thank You!

I hope this old electronics gentleman, who explains everything with such accuracy, diligence, and thoroughness, will remain with us for a long time! I, for one, have learned a great deal from him.

Hi, When one just does the discharge test, mine does not show the capacity of the battery at the end of the test when unit beeps. I tried left/right arrows but just took me to other settings. Am I doing something wrong?

What a great video this is. Thank you for all of your hard work !

I heard the Z-80 stopped production. Does that mean the ZX/Sinclair hobby scene is going to be hampered? Or has someone made an FPGA replacement of the Z-80?

8 years later.... This is still amazing.

I didn’t see you calibrate the individual cell voltages on the balance port. Pretty sure that is an important thing to do. I would not buy the fake version.

this gentleman is a savior🫡

Best explanation on dc loads. Thank you for uploading these videos!

Great explanation! What I do not understand is the transistor configuration. From my perspective the npn transistor is reverse connected. Emitter shall be towards ground. Please correct me if I am wrong.

Hello, I know that a lot of time has passed, but the content you have prepared is still very useful. Thank you ! I wonder why BJT's emitter is connected to -5v? In this case it sounds like the BJT will always be transmitting? It seems like it would be more appropriate if we connected it to ground potential instead of -5v. I probably didn't fully understand the principle of its operation. Can you help me with some keywords for a deep research?

Very informative. I've just asked an ebay seller to refund me as what I purchased is obviously the fake one. Pity I never saw this video first.

hi can you please give me an idea about the cost of this unit?

I have oled with P24B rather than P24c what is the difference?

Good project worth building. Cheers

Hey! How are you holding up? I think one of the best uses for this one would be combining it with the milliohm meter and adding high impedance front end.

its a very good..!!

I've been using a fake for years!!! Thanks for showing me how to calibrate it

And of course .... guess which one I bought.... Wouldn't have it any other way.

Hello, congratulations. I was wondering, how old are you? Until what age can the electronics hobby be continued? Thanks.

Awesome job!

Brilliant. I know time has moved on but really, Wow I understood this , excellent teaching and demonstration. Thank you.

I have made this unit, with all 9 episodes combined and LOVE this thing. Thank you VERY much for all your hard work. ( ps I'm in New Zealand). Cheers

You are inspiring me. I build a variable resistor project with optocouplers and resistors and now I want to switch to mosfet ohmic region!

You never talk to me

Hi: Best wave length to cure white UV paint PCB ??? In my case, green standar pcb uv mask cure quikly in a few minutes with nails-curing (365nm) but white paint... takes hours and hours :S

❤😂🎉😢😮😅😊 ไฟแอดพ์. ???

Hello, looks like youve mixed up internals, while reassembling. Fake unit is not able to calibrate. Theres no calibration option at all. My is exactly the same as your fake one, witnout "Skyarc" logo. Fortunately voltage reading difference is -0,1V so it stops charging LiPo at 4,1V not overcharged it so no damge. Thanks for your coprehensive video. I was truly disapointed to know, i ve bought fake.

where is the part 2? please I hope you come back.

You are awesome, keep going👌 May our god give your strength and health to do more awesome work like this.

One of the best electronic channels

7 years later, I feel like I'm late to the party. Thank you for this excellent series! I'm learning so much. I have a question on the UF5408 diode place in parallel with the 0.1 ohm sense resistor. According to a datasheet I found, this diode is an ultrafast RECOVERY rectifier diode and there are specs for the reverse recover time in nanoseconds. However, in this project, it's the forward voltage that counts when there is an over-voltage. So wouldn't a standard fast-switching diode be more appropriate? What about common diodes like 1N4007? Can those be used or are they not fast enough?

very good review, interesting side note some of the later copies did away with the calibration function something I thought was essential to have

Very high quality content. Wonderful

Any chance of buying one of these as a parts kit? I can do all the soldering and assembly. OSHPark requires a minimum order of 3 PCB boards. An MK2 kit (Video #44) would be of interest as well. Thank you. I really enjoyed the project.

Thanks.