Testing questionable LiPo Battery Charger Schematics I found on the internet!

День тому

Altium Designer: altium.com/yt/greatscott!
Previous video: • Can my $15 DIY AC/DC C...
AC VS DC video: • AC VS DC - Pain Test (...
How dangerous are LiPo Batteries video: • How dangerous are LiPo...
Facebook: / greatscottlab
Twitter: / greatscottlab
Support me for more videos: www.patreon.com/GreatScott?ty=h
You can get some decent LiPo chargers here (affiliate links):
www.elektor.com/diy-lipo-supe...
s.click.aliexpress.com/e/_AM68Dj
s.click.aliexpress.com/e/_A8nfZn
Websites which were shown in the video:
cdn-shop.adafruit.com/datashe...
sites.google.com/site/donutsc...
www.circuitstoday.com/lipo-ba...
www.tp4056.com/d/tp4056.pdf
www.ti.com/lit/ds/symlink/bq2...
www.ti.com/lit/ds/symlink/lm3...
In this episode of testing circuits I found on the internet I will be having a look at LiPo battery charger schematics. I will build up 2 very simple circuits which claim to charge a LiPo battery and test whether they can truly do that. One circuit is based around an LM317 adjustable regulator while the other one is based around an Op-Amp. I will show you the flaws of those simple design and while I am at it also show you my own super simple, very inefficient but safe LiPo charger. Let's get started!
Thanks to Altium for sponsoring this video.
Music:
2011 Lookalike by Bartlebeats
0:00 LiPo Battery charging in general
1:45 Intro
2:25 How to properly charge a LiPo battery
3:56 Testing circuit 1 (LM317)
7:58 Testing circuit 2 (OpAmp)
10:20 Making my own LiPo charger (CC/CV)
11:49 Verdict

КОМЕНТАРІ: 463

@nothingtoseehere4026 2 роки тому

"Hold my beer, while I draw it up". Love the channel.

@Mijo0x9 2 роки тому

um is that a bomb...

@NitinKumar82889 Рік тому

Screenshot

@Asu01 2 роки тому

GreatScott! "Which of these schematics should I pick?" Donut Science: *exists* GreatScott! "Donut Science it is!"

@greatscottlab 2 роки тому

I mean the name really made my day :-)

@MCsCreations 2 роки тому

And who doesn't love donuts? 😊

@JjMn1000 2 роки тому

Hmmm

@chriskaprys 2 роки тому

Donut try this at home.

@blackred5155 2 роки тому

Asu

@jfk4229 2 роки тому

I find it kinda odd that Altium Designer gets marketed to makers. Like 95% can't afford it anyway!

@liquidsonly 2 роки тому

99%

@luizdanielsantos 2 роки тому

99.9995%

@daanb7894 2 роки тому

Right, even for work I design PCBs occasionally and I thought I'd try Altium instead of Fusion 360 but then I saw it was around 3500 per year and I was like nope. Now the Altium salesman won't leave me alone and keeps calling my work.

@satviksharma1146 2 роки тому

I am going to love this series!!

@greatscottlab 2 роки тому

Glad to hear that :-)

@navidmafi 2 роки тому

wow i was waiting for another video from "found on the internet" series. Great video!

@greatscottlab 2 роки тому

Glad you liked it! There will hopefully be more episodes.

@ayman6516 2 роки тому

I'll hold your beer if you made more

@fiordhraoi1 2 роки тому

I appreciate this, especially as a novice. It seems like the bane of all of my projects is trying to fit in Lipo charging/protection boards + a boost/buck converter, so I can understand the temptation to try to find an alternate approach. The fact that I am looking at making wearable things minimizes that temptation to move away from safety, though. :)

@mr.meticulous1241 2 роки тому

Literally! I would love to portablize so many projects but I always get tripped over "simple" power circuitry like this, worrying about charging currents and battery heat, etc.

@sunilkulkarni4426 2 роки тому

WAITING FOR GREAT SCOTT TO UPLOAD AND HERE WE GO!!!!

@greatscottlab 2 роки тому

Hope you like the video :-)

@omaribrahim5008 2 роки тому

@@Rachitkivines it will be too slow

@vladd9344 2 роки тому

@@greatscottlabI LIKE IT!

@blanana_m 2 роки тому

Everytime I circuits built without a board, it makes me nervous as hell one wire shorts and the whole thing just blows up

@geovani60624 2 роки тому

nah, everything used to be like that in the old days

@stevebabiak6997 2 роки тому

@@geovani60624 - and built like that in metal chassis. For those too young to understand, vacuum tube devices like TVs and radios were built like that in production a long time ago.

@legominimovieproductions 2 роки тому

Built an 4x 18650 charger once without much knowledge, powered by the 5v rail of 350W atx psu😅 well the diode i had in the setup obviously was overloaded by the factor 4, then the diode cracked, the springs of the 18650 holders began glowing and it was a total desaster with 4 half charged 18650 cells😂

@keithking1985 2 роки тому

@@legominimovieproductions ITS ALWAYS THAT ONE LITTLE THING YOU OVER LOOK THAT F's IT ON YA!

@1Hippo 2 роки тому

Isn't that the fun of it?

@Kyuunex 2 роки тому

Meanwhile ebay sellers: **wiring the USB plug directly to the battery**

@adlerweb 2 роки тому

Ah - they have internal protection for a reason, right? And noone would ever remove it to save money, RIIIIGHT?

@Kyuunex 2 роки тому

@@adlerweb at least some flashlights that charge via USB are like that. they also come with a cheap 18650 that probability has no protection.

@adlerweb 2 роки тому

@@Kyuunex Well, an overcharged 18650 also produces light, so it's a win-win, right? :D

@caffeinatedinsanity2324 2 роки тому

I never knew negligent batterycide was a legal thing. Turn rechargeable batteries into disposable ones :)

@Eagle-md6ku 2 роки тому

Please do more of this!!! Totally love these videos! You're sense of humor comes out and makes the video very fun to watch

@KamranKhan-co6ox 2 роки тому

Scott can you please make one such video for audio amplifier circuits found on the internet?

@CircuitCreator 2 роки тому

Which kind of amplifier you are looking for

@KamranKhan-co6ox 2 роки тому

@@CircuitCreator any audio amplifier bro...from a simple pre-amp to multi-stage and class A, AB, etc. There're tons of amp circuits you can find on the internet

@yigitsubutay 2 роки тому

Examining ccts, making some improvements this concept is very helpful for beginners and college students. I hope you continue this series. Thankss

@felixbrandau4751 2 роки тому

I learned so much thank you And I love the beautiful diagrams!

@Gold63Beast 2 роки тому

Okay Scott, this is an AWESOME VIDEO!!!! GREAT TOPIC, GREAT EXPLAINATION, overall GREAT JOB!! Very informative. Right on point Scott.

@Katupiry 2 роки тому

With a single extra resistor on your Comparator charger setup, you can create hystheresis and end the oscillations. Usually CV charging stages inside dedicated IC's are implemented in a similar way inside the chip dye

@avejst 2 роки тому

great project 👍😀 thanks for sharing your experience with all of us 👍😀

@michellepowell1956 2 роки тому

"Hold my Beer while I ....." Love it!

@Freenormable 4 місяці тому

You sir are my favorite souce for information and learning. Thank you for your time.

@jacobwigent1931 2 роки тому

Love the channel! I’ve been waiting for this video today!

@greatscottlab 2 роки тому

Hope you enjoyed it!

@smithperks3313 2 роки тому

Just addicted to Great Scott, I have missed your videos,thanks for this,,,Masterpiece

@greatscottlab 2 роки тому

Enjoy!

@princebanini 2 роки тому

It is always most important to understand how a circuit works before using it. That was cool

@slappyrats Рік тому

Man your videos are so informational! Great content ❤️😁

@prisedeterre1356 2 роки тому

This series really makes my day ! What about some high voltage circuits you find on Google images next time ?

@jj74qformerlyjailbreak3 2 роки тому

Great Scott Love your work. Glad to see a new vid.

@greatscottlab 2 роки тому

Thanks 👍

@SirDella 2 роки тому

I'm glad the lovely tp4056 module exists, I'm using one as I watch the video

@prte100 2 роки тому

Im so happy about their existence, made in china, but works perfect and for less then 1$ from china, quiet enough and good for every battery project.

@newburypi 2 роки тому

Really like this type of video. Thank you, and well done.

@stalindsouza9486 2 роки тому

Amazing video with great explanations sir😍

@greatscottlab 2 роки тому

So nice of you

@inceptsquad9516 2 роки тому

This video type is an amazing idea hope to see more in the future

@greatscottlab 2 роки тому

More to come hopefully

@Kl1Ainti 2 роки тому

I love this series, keep it up!

@greatscottlab 2 роки тому

Thanks :-)

@sushantadaki6212 2 роки тому

I would definitely love this series I personally like it a lot..

@ThriftyToolShed 2 роки тому

Awesome video. Thanks for sharing!

@nixxonnor 2 роки тому

Nice video that adds to people's understanding of how stuff works :D

@fajakbar1851 2 роки тому

Nice! I really love this, maybe you can test circuit like overcharge and overdischarge. Overall, good job!

@vidulabeywickrama7852 2 роки тому

The videos just keep getting better. The only down side to ur vids are that we cant stop watching. Very great content.

@greatscottlab 2 роки тому

Glad you like them!

@niar491 2 роки тому

This series is great :)

@TheMechanicGamerVids 2 роки тому

I really like this series 👍 good work

@greatscottlab 2 роки тому

Glad to hear it!

@pcbdesign819 2 роки тому

It's great video, i really like the way you do it.

@Boogie_the_cat 11 місяців тому

I really appreciate this topic. The fire with lipo batteries is bad enough, but the huge amounts of toxic smoke they produce is another huge danger. I see a lot of youtubers treating lipo batteries very casually, using very dodgy practices and not taking the risk seriously. i have firsthand experience with a lipo battery fire. thank goodness, it occurred outside (due to the smoke) but wasn't near flammable vegetation.

@Bhavesh_g20 2 роки тому

Waited for you to upload a video I went out of my room and when I came back I saw my laptop giving me notification of your video Was very excited for video And the video completed its expectation correctly :)

@greatscottlab 2 роки тому

Hope you enjoyed it!

@jdpantoja442 2 роки тому

Very inspirational video, thanks Scotty!

@greatscottlab 2 роки тому

Glad you enjoyed it!

@Casperdroid5 2 роки тому

Very interresting! Thank you!

@m.s.m8918 2 роки тому

Love this series!

@greatscottlab 2 роки тому

Brilliant :-)

@melplishka5978 2 роки тому

Good one Scott ty

@diy-fun509 2 роки тому

Love you man ❤️. A true engineer.

@greatscottlab 2 роки тому

Thanks mate :-)

@Car_Ram_Rod 2 роки тому

I love this series!

@blackred5155 2 роки тому

Obat gigi yang murah, apa yah?

@anuragmahajan5919 2 роки тому

Awesome video, waiting for another episode of, "Testing circuits I found on the internet".

@Johennessy 2 роки тому

Sehr cooles Video. Danke.

@Somgosomgo 2 роки тому

Glad to see you switched over to Altium. I use it at work. Can't see myself ever going back to OrCAD or anything else.

@allasayegh1411 2 роки тому

great as always

@greatscottlab 2 роки тому

Thank you! Cheers!

@clems6989 2 роки тому

Waiting on next video in this series..... BTW, I think this is a great !

@vitruzicka7542 2 роки тому

You should consider changing the name of the series to: Anyway, I went on the internet and I found this:

@CircuitCreator 2 роки тому

🤯

@thekaiser4333 2 роки тому

Testing questionable Schematics found on the internet! That's a great idea!

@JawadAhmadsahibzada 2 роки тому

Great 👍🏼 Scott !!!

@greatscottlab 2 роки тому

Thanks 👍

@bundokz1997 2 роки тому

I can use this to charge my 18650 cells laying around here. Nice video as always

@dodutils 2 роки тому

As usual excellent, I do have a question when you use your multimeter in current meter mode do it change the voltage as such multimeter may uses shunt resistor method.

@nistakmahmud 2 роки тому

Best series....... Love from Bangladesh

@edvardfranke 2 роки тому

Love it!

@electronic7979 2 роки тому

Helpful video. İ like it

@sudheerkumar5966 2 роки тому

Very good sir 🙏🙏

@KC-yk5xe 2 роки тому

I charge my drone lipo at 2c with temp probe going to the charger, and i usually do 1c on lipo and .5c on liion (when doing it safely?) Btw great vid as always

@harrison8021 2 роки тому

Ah...the sarcasm This will be an awesome series 💥

@francescobattaglia5322 2 роки тому

Thanks!!!!

@antkoos 2 роки тому

I think there is a schematic with a lm317 where you don't need to use 2 IC's, just one could regulate the voltage and keep a constant current

@kyhldk 2 роки тому

One of your better videos🙂👌👍

@greatscottlab 2 роки тому

Thanks 😁

@Leroys_Stuff 2 роки тому

The sketchy circuits I found on the inter webs is the best.

@ott0dott0 2 роки тому

Hey GreattScott! I was wondering if you can review some Google circuits about temperature regulation for a soldering iron. Thanks, love u !

@rp1570 2 роки тому

Love u videos of 'circuits I found on the internet '

@greatscottlab 2 роки тому

Brilliant :-)

@oakkar7 2 роки тому

Simple and clear as usual. Can you kindly recomnend or test any simple lipo low voltage cut off circuit with only discrete components? Most cheapo lipo charger and bms module seem didn't support low voltage protection.

@chrisellingson123 Рік тому

I was going to say working with lithium is more nerve-racking compared to mains supply. 😂 These are missing an important feature; charge termination based on the cells specified termination current. If left in CV the cell will heat up, overcharge and swell/pop a CID.

@akhurash 2 роки тому

Great video. With how cheap components are now a days (well I guess before COVID), it’s safer and easier to just go with a charger IC/module.

@navidmafi 2 роки тому

wait how tf this comment is from a week ago. i guess the video was private

@zzlg 2 роки тому

@@navidmafi he's a patreon member

@fabianrudzewski9027 2 роки тому

Those lipo batteries should have a charge C rating printed somewhere. You get the max charge current by multiplying with the capacity.

@keithking1985 2 роки тому

waaheeyy. the two LM317 circuit would have been the way i would have solved it.. its great when you see that your actually learning this stuff. : ) PLEASE DO MORE VIDEOS LIKE THIS ON CIRCUITS YOU FIND ONLINE.. p.s. anyone who wants to know which to put 1st when making a CC/CV circuit with 2 LM317's you always put the CC one 1st & not the other way around..... CLASS BLOODY VIDEO BUDDY.. 10 THUMBS UP. ; )

@rpeetz 2 роки тому

Those multi batteries chargers are expensive but it is worth, easily adjustable charging current, multi cell lithium battery charging feature, not to mention the presets for various types of batteries.

@iamdarkyoshi 2 роки тому

Isn't an "anti trickle charge" cutoff an important part of lithium charging? I thought that leaving them on a CV source for a while can cause issues, which is why the tp4056 shuts off once it decides the battery is charged

@eDoc2020 2 роки тому

Yes, at least if you use a constant 4.2v. If you use a lower cutoff voltage it might be okay.

@DoctorX17 2 роки тому

Personally I just go for cheap little charging boards that use a LiPo charging IC, which usually you can just integrate into a design if you get to the PCB stage

@RoyalTech_2024 2 роки тому

Hi Great Scott, any scope for a MIDI synthesizer project?

@micromachine9975 2 роки тому

Este cargador vale tambien para las 18650? Thank you!

@GODAXEN 2 роки тому

I made one using the L200C instead of the LM317, is a 5 pin TO220 voltage&current regulator lamentably if I'm not wrong nowdays is considered obsolete and possibly also out of production.

@smeducare6858 2 роки тому

You are Great!!!

@FictionalEngineer 2 роки тому

Hey scott, do we need bms for lead-acid/gel batteries? Its in series to give an 48v output Is bms really necessary?

@BobsEVGarage 2 роки тому

For anyone curious about how the 1.2 ohm current limiting resistor only allows 1 amp, with a voltage of 4.2 volts, it is because in this case, the voltage of the battery, effectively cancels out some of the voltage across the resistor! If the battery is at 3.7 volts, and charger at 4.2, the actual voltage across the resistor is (4.2 - 3.7) 1.5v, thus the ~1 amp draw.

@sebastiannobody1142 2 роки тому

As you have a common model rc lipo you can charge them with one 1C (600 mAh). Better ones are also rated up to 4C. But this could reduce their life span.

@rubabmubarrat 2 роки тому

well explained

@melplishka5978 2 роки тому

Funny thing I used a 12v battery charger one and needed to modify a bit for added safety lol but wasn’t too bad , even efficiency was pretty good lol

@fixnreview 2 роки тому

Watching from Ormoc City Philippines

@AgentWaltonSimons 2 роки тому

Top tip I learnt from Big Clive: if you're messing with LiPo batteries, the best piece of equipment to have to hand is an Explosion Containment Pie Dish

@Delwin_Cardozo_27 2 роки тому

It's better to buy a branded and high quality charger for such lipo batteries 🔋. Thanks 👍

@greatscottlab 2 роки тому

Yes, true

@pesho9971 2 роки тому

I've always wondered why put the CC lm317 before the CV one.Wouldn't it make more sense to go CV first then CC since when the current start to drop the CC lm317 wont have to do any regulation?

@sheogorathboon8256 2 роки тому

One thing I noticed with most of these circuits on google or bought on ebay, none feature redundancy i.e a fuse or voltage supervisor. if the circuit fails it has to fail safely.

@PaintmanJohn 2 роки тому

Dead Bug style would be better than all those parts suspended in MID AIR. I like to build ONE OFF designs without a breadboard. Simply mount your biggest parts that will support others to a piece of perf board , or even a sheet of plastic. I have used Double Sided tape, hot melt glue, Super Glue, NYLON nut & bolt hardware, and even just solder to hold parts to a copper sheet. Also makes a great RF shield. Others have used a piece of wood or GLASS to support parts, as well as insulate them. Some groups even get together for "UGLY CIRCUIT" CONTESTS ! Any takers ?

@thisfeatureisbad 2 роки тому

Would it be also possible to use your circuit with CC and VC to charge an AA battery?

@Geniusinventor 2 роки тому

Please do a video on found on Internet on sound amplifier circuits . I want to know how chip and good and a Internet amplifier can get

@MoisesCaster 2 роки тому

Please make more videos like this one.

@ppsps5728 2 роки тому

Even though I do more software that electronics , feed by electronics loving brain mainly through UKposts channels like yours.. Keep up your great work and nice explainations.. A small request from my end .. SW radio and Plasma ball .. Please add to your list ..

@neutronenstern. 2 роки тому

3:52 but then it never will be full. To get it full you will have to go over 4,2V due to the resistance of the wire and inner resistance of the battery. So load it with more than 4,2 V for a short anount of time, then stop loading while mesuring the voltage and so on.

@Sylvan_dB 2 роки тому

The little tp4056 modules are great functionality, especially for the price. Reasons to not use one: * need to charge a different lithium chemistry not to 4.2v (e.g. LiFePO4 to 3.6v) * need to charge a multi-cell series battery (tp4056 modules are not isolated so cannot trivially use one per cell without unwiring the battery) * need more than 1amp output current (can use more than one in parallel if your 5v supply can supply suitable current) * don't have one, and do have a bunch of other components (time to buy some now to keep in stock)

@ludsonr7428 2 роки тому

I use isolated power sources for each tp4056 to charge multicells

@pavelperina7629 23 дні тому

I was thinking about something maybe even more crazy - capacitor that is charged by PWM (up to 10mA limited by resistor) from MCU and discharged via resistor and also connected to gate of mosfet. Then monitoring current and voltage on battery via ADC inputs and controlling and regulating PWM->Mosfet gate voltage accordingly.

@pascalvonrotz6555 2 роки тому

I love this sort of video ver nice

@greatscottlab 2 роки тому

Great to hear :-)

@ricardofunes413 2 роки тому

If I understood correcty, the first circuit was very dangerous, as it would charge the battery with several amps. It only became adequate after you modified several resistors, so for me the first circuit is a fail.

@theLuigiFan0007Productions 2 роки тому

Depends of the battery size, but it's definitely for use with whatever capacity battery it was calibrated for. So, inefficient, and essentially single purpose, requiring modification to charge varying sizes. Something like that would maybe be suited for a outdoor solar light or something equally cheap and unchanging. But yes, for a few more dollars a proper IC and design is available.