DC Converters & Battery Packs - How To Choose Them

[@diyexplorer8728]

Don't let your cat be in charge of the potentiometer. It will be CATastrophic. Very informative video.

[@kosmokramer9502]

I'm not talking about sexy hot, I'm taking about dangerous hot🤣😅😂🤣😅. That made me laugh

[@smartcookie_ibrahim4542]

I 💕 your assistant

[@strugglingparodox5709]

I have some of the boost boards you worked with, but I don't have the means of running tests quite the way you did. So,, this was a helpful video. Thanks.

[@tejas.sonar.6087]

The way you make a video Is superb On your video the safety in your product is first...

[@vinniec5286]

This was excellent, Sorin. I learned a few things. Thank you. Liked and subscribed.

[@anunyvape7808]

The best channel ever Your work is clean and beautiful I wish you success

[@gs637]

Good stuff again, Sorin, thanks! If you have time, maybe you can do a video about how to choose a proper BMS for power tool NiCad to Li-Ion battery pack conversion. I am sure i will be watched (lots of inconsistent/un-savvy info floating around on u-tube on his subject).

[@Anjalisingh-wy4nv]

Love from india .this channel is underrated

[@KrumpelSVK]

Long time no see. I love your videos :D

[@azlannakamoto7913]

great educational video, loads of new info. thanks

[@electronic7979]

A helpful information video. I liked

[@ToolDroidGaming]

You're really protecting ur batteries ...you're taking care of them...😙👍

[@napoleonwilson3912]

Excellent video as usual. Like the new assistant. (I miss the old opening music though)

[@darius828]

De cand asteptammm. Super 💪.

[@WatcheswithGeorge]

NIce one Sorin! Keep it up bruv!

[@arfan521]

love your personality!

[@siryoneyal]

Hi Sorin. do you have a video showing how to build this beutiful volt amp meter shown in 1:35?

[@Sorin_DIY]

hi. I have the DIY voltmeter/ammeter tutorial, but on my Patreon page. I need some videos for my patrons only, as a gratitude for their support. on my Patreon page I also post extra footage and updates about future projects. you can become a patron if you want, for only $1 - $5 /month.

[@pb_y43]

I think you should make a spot welder for battry pack

[@DrZipZwan]

DAMNNNNNN!! that is a very good videos!! A lot of stuff to learn from it, as from all your video buddy 😉 Keep the great work!

[@Antovin33]

thank you very much!!!! i just wanted to build battery pack for my laptop using those dc-dc converter but im still not understand how it works and really afraid to destroy my laptop. sry for my bad english, keep up the good work!

[@ioanniskontos9439]

Hello Sorin, you made again the best video for this topic! Thank you! I want to ask you if its the same to use 6S with buck boost converter setted to the voltage that 3S would give instead of 3S3P.

[@Sorin_DIY]

hi. you need to make the battery pack with the voltage closest to what you need. if you need the voltage of a 3S, you should make it 3S2P or 3S3P.

[@ioanniskontos9439]

@@Sorin_DIY Yes, o know but i cant find 3S2P BMS and i thought that a buck boost converter when increase voltage decrease current so if i make a battery with double current i can convert it to signle current with double voltage.

[@ericklein5097]

@@ioanniskontos9439 There is no such thing as a 3S2P BMS. BMS is not concerned with your parallel groups. The Amperage rating given on the BMS is for charge/discharge of the pack. What the cell is capable of delivering doesn't matter so long as the load is less than the max discharge. Say your 3S3P pack uses 20A cells so you could potentially deliver 60A. If your load will pull 7A max then you are fine with a 10A BMS (but I always suggest giving yourself more room due to cheap Chinese components). Not sure what you mean by double current or single current/double voltage but I think your confusion is about the amp rating of a BMS and the fact that amperage of the source only matters in that it is equal to or more than the load.

[@MrGmanGB]

Hey - Great channel. Cannot find your video to your home made ameter / voltmeter?

[@Sorin_DIY]

hi. I have the DIY voltmeter/ammeter tutorial, but on my Patreon page. I need some videos for my patrons only, as a gratitude for their support. on my Patreon page I also post extra footage and updates about future projects. you can become a patron if you want, for only $1 - $5 /month.

[@christopherj3367]

great video sorin.

[@kacpreusz9911]

Finally something new on your channel:)

[@galaxy5am987]

Great video as always

[@jogta160]

Mr. Sorin u got crazy little bit during lock down.

[@ElectroRetro]

After a long time!

[@rodck333]

Hello Sorin. It was not clear for me the criteria to choose the 5s over the 4s for the buck converter. Is it because it has a higher margin even with the voltage drop at 2.7v for each cell? Is it because it gives you more power time? Both? Or maybe none of those reasons. Thank you.

[@Sorin_DIY]

Hi. with a 4S battery pack, the buck converter has a good efficiency, but depending on what BMS board you use, the lowest battery voltage (before the over discharge cut off voltage of the BMS) is too close to the minimal input voltage of the converter, so the converter may not work correctly with a low battery. a 5S battery pack has an efficiency a little lower than the 4S pack, but it doesn't have the low voltage problem for the converter. the 6S and 7S packs have a lower efficiency than the 5S pack, because the voltage difference between the input and the output of the converter is too high. so for that test the 5s is the best compromise considering the lowest input voltage for the converter and the highest efficiency.

[@rodck333]

@@Sorin_DIY Thank you, it is perfectly clear now. On another note, I was preparing to build your 70wH fast charging powerbank to replace a rechargeable battery for a PAPR (breathe easy turbo by 3m) that is very expensive and hard to find. The issue is that I could not find any specifications printed on the small air pump nor online. I only know that the rechargeable battery it uses provides 8Ah at 6.25v per the photos of the label. I figured I could build your design and just set the converter to 6.25V, but since I dont know much about the matter yet, I would like to make sure your build set to my desired voltage would be adequate or if you would recommend something else or perhaps some changes to your original build.

[@ahmadsyahza3415]

amazing content , keep up the good content

[@renzpatricksebastian9899]

Love this video very much! When will you make a solar powerbank?

[@Sorin_DIY]

there is a problem with ordering components from China in this period. some of my orders haven't arrived.

[@OneMarcFifty]

Sorin - DIY Electrical Nerd let me know what you need - I’ll have it DHL’d to you from Germany!!!

[@ericklein5097]

This is such a great video for teaching beginners on how to properly select a buck or boost converter and what kind of efficiency to expect. The only thing I'm confused about is why you would choose such a high power cell for a very low-medium power load. Those VTC5's or were they 4's? are way overkill. Most cells can do half their rated discharge without taking a huge hit on capacity or cycle life. If I had to power a 3A load I'd be more than happy with an 8A or 10A continuous discharge rate.

[@Sorin_DIY]

Hi. Thanks for watching my videos. I just had those cells lying around, so I used them for different tests.

[@Bylga]

Thanks for sharing and making it easy to understand =)

[@edwardleonard3465]

For the MT3608, is the usb port mandatory? I can get 12 non usb for the price of 6 usb. I didn't see it used, but I'm blind. Thank you again, Sorin!

[@Sorin_DIY]

the modules are the same. the only differences are the size and the microusb port if you need it.

[@edwardleonard3465]

@@Sorin_DIY thank you again. I'll get a pack of each type because I feel like they won't go to waste. You're a great person, Sorin.

[@nemisis010]

Did you ever do a video on your v/a meter?

[@Sorin_DIY]

hi. I have the DIY voltmeter/ammeter tutorial, but on my Patreon page. I need some videos for my patrons only, as a gratitude for their support. on my Patreon page I also post extra footage and updates about future projects. you can become a patron if you want, for only $1 - $5 /month.

[@bobikleeds]

Hello mate. I love your videos. Do You think there is a way to build up your own battery load tester for high discharge packs etc. 48v 72v and more To test them under load 40 60 80 amps. Etc? Thank You

[@bobikleeds]

Hello there. Simple yes or no would do here. Thanks

[@jatinmali9310]

@@bobikleeds ofcourse you can , just search on the internet

[@dragosmihaimoraru7433]

Well done. Info cat cuprinde 👍like it .

[@toxictony100]

Can you suggest the board for 30watt pd usb c power bank

[@GregOnSummit]

Link to that cool Power Supply you made?

[@Sorin_DIY]

kzbin.info/www/bejne/Y6WUqJx9p911aKc

[@abdullahsiddiqawan9100]

Nice working.

[@JohnWick-pz5vp]

Great video as always. Sorin, I’ve a question to ask. Can you recommend a method to hookup 4Ohm 3W speaker to a 50Wx2 amplifier?

[@Sorin_DIY]

hi. you can't connect 3W speakers to a 50W amplifier. if you accidentally increase the volume too much, you will blow the speakers. you need speaker drivers with more than 50W rms.

[@JohnWick-pz5vp]

Sorin - DIY Electrical Nerd Thanks for the reply. I thought while we have a method to amplify Wattage via Amplifiers, there would be a method to Reduce Wattage of high power amplifiers (like we have buck & boost converters to up & down the voltage)

[@ingcaro]

do you have a video for diy voltmeter - ammeter?

[@Sorin_DIY]

hi. I have the DIY voltmeter/ammeter tutorial, but on my Patreon page. I need some videos for my patrons only, as a gratitude for their support. on my Patreon page I also post extra footage and updates about future projects. you can become a patron if you want, for only $1 - $5 /month.

[@arunbalakrishnan8978]

useful informations. recently i planed to build a battery pack for my motor bike. initially bike has a lead acid battery which is almost dead. i want to replace. I just made a 3s pack and everything in the bike (horn, indicators etc) is working. But im not sure thats very safe. Can I charge using built in generator? 3s or 4s is best. can you do a video?

[@Sorin_DIY]

hi. what's the original battery voltage? 12v? then you need a 3S battery pack. what's the maximum current draw of your motor bike? you probably need a lot of cells in parallel, maybe 3S6P or even bigger. you need high drain cells. you need a powerful BMS protection board for the battery pack, that can handle the maximum current. you can't use the original charger, you need a powerful 12.6V charger.

[@arunbalakrishnan8978]

@@Sorin_DIY in motor vehicle how can we use a 12.6 v chargers? is there any other ways. because i think there bult in alternator providing 14v or so thtas suitable for 12v lead acid.

[@Sorin_DIY]

you can't use the bike alternator and replace the lead-acid battery with li-ion. the batteries have different charging topology. if the alternator gives a constant 14V, you probably can use a powerful step down converter with current limiting, to decrease the voltage to 12.6V. then you can use a 3S BMS protection board to charge the lithium battery pack. it needs more testing, maybe a few modifications to the alternator, but I think it will work. and when you're at home you can use a separate 12.6V charger to charge the battery pack.

[@arunbalakrishnan8978]

@@Sorin_DIY If you feel this is an intresting subject for a video, that will be awesome. Many folks will get use. Thank you 😃

[@thefademanro4874]

Salut Sorin! Am si eu un proiect. Am o surubelnita electrica si vreau sa ii pun un acumulator din 2 celule de laptop sa meargă la 7,4V , dar am încărcător doar de 3,7V. Am reusit sa fac circuitul cu un comutator sa încarc celulele pe rand acestea incarcandu-se la 3,7V. Dupa ce sunt incarcate mie imi trebuiesc inseriate. Cum fac? Sper sa ma ajuti cu o schema sau cum sa o fac

[@Sorin_DIY]

salut. cele 2 celule si incarcatorul de 3.7v nu sunt suficiente. mai intai trebuie sa verifici cat curent consuma surubelnita electrica. e posibil ca motorasul sa consume mai mult decat pot reda acumulatorii si sa ii forteze. in cazul acesta ai nevoie de celule "high drain" sau sa conectezi mai multe celule de laptop in paralel, de ex o baterie cu 4 celule 2S2P. apoi incarcatorul de 3.7V nu este suficient. fiecare celula trebuie incarcata cu metoda constant-current/constant-voltage pana la 4.2V. daca incarcatorul acela reda 3.7V stabil fara circuit de incarcare, o sa deterioreze acumulatorii. ai nevoie de un modul BMS 2S ca cel pe care l-am folosit in clipul cu 12V mini UPS si de un incarcator de 8.4V.

[@thefademanro4874]

Vai de capul meu 😅. Le-am legat in serie având 7,4V si le încarc cu un încărcător de 9V, sper sa nu bubuie😆

[@AbdullahBordbar]

I LOVE YOU, Sorin

[@ShadowFandub]

i really like your videos! hi from Argentina :'D

[@jamess1787]

I need a juice... Carlsb....orange juice of course. MMM. 🍺🍻🍺

[@hemshi769]

Sir when will you do qc powerbank ,you should match up with technology so we can do your DIY and save some money instead of our purchasing .

[@Sorin_DIY]

I plan to build a powerbank with a lot of features, but I'm still waiting for the components. in this period most of my orders heaven't arrived.

[@hemshi769]

@@Sorin_DIY kzbin.info/www/bejne/Zpu1pJ-qfrxrp68 i saw this but this is far above my knownledge

[@steambun5539]

Can you post the video of your DIY Voltmeter and Ammeter?

[@Sorin_DIY]

hi. I have the DIY voltmeter/ammeter tutorial, but on my Patreon page. I need some videos for my patrons only, as a gratitude for their support. on my Patreon page I also post extra footage and updates about future projects. you can become a patron if you want, for only $1 - $5 /month.

[@mariusmagdici5514]

Salut Sorin, de ce ai renuntat la postarile de pe celalalt canal?

[@Sorin_DIY]

salut. am vandut masina :)

[@c462-]

Great video! could you make some diy bluetooth headphones, including diy drivers? It would be great!

[@Valyoung1973]

Sorin please give me a link of step up converter I would like to use it for my project

[@Sorin_DIY]

www.aliexpress.com/item/32858968862.html?spm=a2g0s.9042311.0.0.27424c4dK9nGg2

[@techbarron7383]

next video,,, HOW TO MAKE POWERFULL FLASHLIGHT USING 50W LED

[@DrZipZwan]

😁😁

[@Sorin_DIY]

I plan to build a 100W flashlight, but I'm still waiting for some components..

[@crazyhacker1099]

Can any one help me Which is better in efficiency and is the least in wasting energy in the form of heat when we make Power Bank (1) Do we connect the batteries in parallel and then connect them with a voltage booster to 5 volts (2) or connect the batteries in series to get 12 volts then connected to a step down buck converter to 5 volt????

[@creativekristan8386]

"I'm not talking about sexy hot I'm talking dangerous hot"

[@VerifyIT]

You are using a lot of these 18650 batteries. Can you build a project that will test one of these batteries for a certain amount of time? For example, it will charge and discharge a cell for as long as you leave the device powered. So it starts by charging the cell, then when it gets to approx 4.2V it will stop charging and will start discharging up to approx 3V and then start charging again and so on and maybe measure either the number of times it charged the cell or the amount of energy used in the process. This would be very useful when you want to check the health of a cell over some time and/or a number of cycles. Imagine if you want to buy some cells from aliexpress or similar but you don't trust that the cells will last very long. You can buy one and have it in this device for a few months. A cell that is advertised for 2500mah will take less than 125 days to go through 500 cycles if the battery holds its capacity or less if it will decrease. After this, you could retest the capacity and see how much you have left. Best wishes!

[@ericklein5097]

You could rig something up with an arduino or set up an EBC A20 battery tester to do a bunch of cycles. I just don't think it is necessary. The cycle life will be fine so long as the capacity test and the max continuous discharge test match the manufacturers datasheet. It's pretty much impossible to make a cheap cell that will pass the capacity and discharge test only to flop out on you after 100 cycles.

[@rosekreuze]

its been a while sir without new upload. btw, have you ever worked on XH-M603 modules?

[@rosekreuze]

i also have a follow up question, in a documentation of the my bms claims a charging voltage of 12.6v to 13.6v. is it really recommended to hook the bms on a 13.6v charger?

[@Sorin_DIY]

hi. I did not use that charging module. the charging voltage depend on the type of battery. for most lead-acid batteries 13.6V is ok. but you should read the battery specifications. you also need a powerful charger.

[@jonathanlow158]

How do you make a solder?

[@amrzakaria5290]

Thank you for your good job

[@jogta160]

Please make small solar generator for trekking.

[@ramarastogi922]

Pls do fast im waiting for your next vedio

[@carrytrainer.editor3321]

great video! Thank you

[@x1x4x1]

zvs induction heater please :) thnx for the videos

[@georgianmarcu8221]

Sa organizezi și tu u Q&A sa aflam si noi mai multe despre tine ....tot ești în carantina acum :))

[@Sorin_DIY]

salut. m-am hotarat sa fac un Q&A video la 100k abonati. sper sa reusesc pana la sfarsitul anului :)

[@georgianmarcu8221]

@@Sorin_DIY sper sa reușești până luna viitoare! Paste fericit!

[@amitghosh6966]

Nice video

[@hagarabdullah8851]

how can i get 5V 6A from battery ?

[@seanchallenge]

Excellent video thank you SeanZS5X

[@Edmorbus]

great video

[@ET___IshtiaqueAhmed]

I love this type of vedio... 😍

[@ramarastogi922]

Pls tell will the next movie release

[@Valyoung1973]

Hi please give me step up buck converter link

[@Sorin_DIY]

hi. step up converter: www.aliexpress.com/item/32700405148.html?spm=a2g0o.productlist.0.0.7f7218f5UkihaK&algo_pvid=77968ed2-4481-4a5b-bd52-905da096a771&algo_expid=77968ed2-4481-4a5b-bd52-905da096a771-1&btsid=0bb0622f16048556099417983e0105&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ step down converter: www.aliexpress.com/item/32859386096.html?spm=a2g0o.productlist.0.0.26c46addLb8l2Z&algo_pvid=bdd78456-a52d-4ee1-b46c-170e62f80443&algo_expid=bdd78456-a52d-4ee1-b46c-170e62f80443-8&btsid=0b0a556516048554708261953e520d&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

[@kevindelossantos2097]

Yeah, fun stuff.

[@kacpreusz9911]

0:21 Math teachers be like:

[@richardlighthouse5328]

what is this? 0:27

[@Sorin_DIY]

my home made mini fridge with peltier modules.

[@richardlighthouse5328]

@@Sorin_DIY Cool

[@murraymadness4674]

I have been using a voltage multiplying circuit to boost 12v to 36v, but it can also be powered with just a single cell and then multiply the voltage to what you need. No balancing needed.

[@davey2k12]

That depends if you have spare 10 grand to keep swapping them out when they wear out .....there is limits to everything say parallel 10 cell if 1 cell fails the others take over and stresses them and in series it's a pain to strip pack to get to middle cells and more connections increase pack resistance Read data sheet before buying 👍

[@usahapetani9743]

10:30 till end 🤣🤣🤣

[@edoha3646]

hey men nice video ! Can you try to make arduino react to real time music with ws2812b will be really helpfull and nice ! thanks

[@kennmossman8701]

Are you a bit too focused on the battery packs? Two points on the DC converters; 1) efficiency can vary a lot by make/model. I have seen everything from 65 to 95% 2) often they have a peak efficiency - at certain voltages and current. So one converter is not an universal solution

[@GiullianoMoraisPires]

Good night. You can release simultaneous translation, because I'm from Brazil and I don't understand English. I am using the google translator to write this comment. Thank you.

[@omarrama7618]

Hello Sorin, i waa thinking if you make a Spot Welder for lithium ion cells, make one in a day, if you have a idea to make another video make the Spot Welder in future. My idea come from : go to youtube and search ; creative channel how to make spot welder, you will see tons of videos. Hope you will make one.

[@cristian.duluman]

Nice!

[@tejas.sonar.6087]

Bro please make a video on how to make a inverter in your style Please P L E A S E

[@paulpaul2112]

Fă și o batterie de 36v or 48v cu cât mai mulți mAh. Cap-coada, sa fie pe înțelesul tuturor.

[@bbekkaa365]

Take care

[@pb_y43]

I think you should start repair electronic items

[@bucharestcartraffic]

come on man... more videos...

[@bobi_lopataru]

14 minutes ago, nice!

[@Kacper-fp1ok]

Like👍👍 ist awesome

[@DIYwithBatteries]

10:23 XD.

[@retMayer]

"Thumbs -up"

[@syrex9560]

please can you make a 5kva or 10 kva stabilizer

[@syrex9560]

Plz be regular to get good views

[@fahimqadri444]

Hi friends

[@Newb1eYou_]

YES FIRST

[@retMayer]

"Thumbs -up"