3.7v Lithium Battery Charge Full & Low Level Indicator

[@danushkajayalath5485]

I made this. It is working good. Thanks.Good Job.👍

[@farooqdurrani1014]

Please tell input voltage?

[@spicyfoodie5693]

I maked it today for my lithium ion battery it perfectly worked thanks bro your are great

[@jebaimmanuel8639]

Bro if it work we use other resistor

[@candrasniper3404]

I've seen this similar circuit in other videos. The weakness of this circuit, both led's light aren't bright enough as an indicator for 3.7v battery. And using different size of leds or using the clear led type, will change the value of low voltage, even using same color (red and green). I've done the experiments to make the led brighter as indicator but precisely state the low voltage value that I want. And the red led starts on at 3.3v as the low voltage. And at 4.2V, the green led lights brighter. So, it can be used with the general powerbank charging modul which is off at 3.1v because the over-discharge protection feature. Declare the low voltage for 3.7v battery is quite tricky than using this circuit for 9v or 12v battery. So that, this simple circuit is playable. Just understand how the circuit work first.

[@caonaido]

Yre

[@apnamultitech786]

Wow dear good circuit to protect Battery from over changing

[@shawnoferrell806]

Nice job. Simple circuit. Al though the voltage levels for lithium batteries is 3.7v low (considered dead) and 4.2v high (or fully charged). Commonly battries are labeled with there low or dead voltage. Like a car battery (sla) 12v, technically 11.5v is the low voltage and fully charged is 13.5 to 14.5 volts. execpt for ni-mh, ni-cd and alkaline. There labled voltage is full capacity like a AA. 1.5v

[@eogtv926]

Thanks so much for this video

[@t1d100]

The introduction picture shows the red wire connected between the two series resistors leading to the green LED. At 2:00, the video shows this wire connected directly to the green LED's pin. Which is correct?

[@VillanuevaParra-h2h]

Buenos días hermano, muy bueno tu circuito, una pregunta me servirá con el transistor BC548? Gracias espero tu respuesta....

[@Олексій-к1ц]

Hello! And can you make the same simple BMS scheme, with charge control (without discharge control) for 1, 2 or more pieces (16s)? It would be very interesting because Chinese boards sometimes work incorrectly. Thank you.

[@garymucher9590]

For those of you requesting a 12 volt version. If you understand how this one works, making a 12 volt version would be a piece of cake. If you look at the two LEDs, they both are 3 volt versions (voltage drop across them). Meaning when voltage is applied to the circuit, if the voltage is higher then 3.6 ~ 3.7 volts, the transistor is turned on and the green LED will light. And that is because when the transistor is turned on, it effectively shorts out the Red LED to ground via the Collector Emitter. Once the voltage drops below the 3.6 ~ 3.7 volt range, the transistor is turned off and the voltage then flows through the Red LED because the voltage needed to light the Green LED with the series diode would be below their forward voltage drops added together. It is the combination of LED voltage drops plus the 1N4007 forward voltage drop that allows the circuit function that way. ALL the resistors are current limiting, so that either LED doesn't burn out from the excessive current flow across them. Now make your circuits!

[@majidali4262]

But we need 4.2 to charge the cell. Thats not a piece of cake....

[@mohdsaleemansari2205]

Love from india

[@AbdeshKumar-cj6vz]

Nec d882p use kar sakte hain is Ke Badle Mein

[@shawonrezashah9707]

Thanks, can input 220v ac? Shawon, from Bangladesh

[@Techsaw]

No

[@evilsamurai848]

Congo For 1M views...

[@mekulpandya6690]

Nice , Bhai , 5 mm ka l e d kitne volt ka aur kitne watt ka lena hai. Please replai .

[@OwnDreamOfficial]

Where is charger, where is battery... 🤣 🤣 🤣 🤣

[@apnamultitech786]

I have Subscribed ur channel,

[@angadyadav3587]

Sir agar led Nahi lagaenge to chalega kya led ke bina

[@26rey01rc93]

Thanks a lot sir you're so good hope to do this soon God bless you more.

[@shortsmojsachin3610]

220 ki jagaha par 330 ka nhi laga sakte kya haa ya naa answerde plese

[@univercellsoft]

what about 12v Battery Charge Level Indicator? Please Let me know

[@sunilgawate1088]

show 12 v battery charger lavel

[@SUN-007]

I recommend you guys always use bms board, because lithium battery is very dangerous, it's not like old batteries....

[@ishvi9195]

Bhai battre aur charging connector ek jagha se hoga

[@tilokdas3711]

By this circuit,,can we charge battery?? Or this will only show battery level??

[@ex-soldier4341]

This is misinforming, it got full(green) at 3.7 volts when that voltage is lowbat😂

[@MrPeloseco]

Just change the 1n4001 diode for another one with a greater voltage drop. I believe 4001 drops 0.7V

[@jaiprakashsharma506]

Yes i also faced such a problem..

[@jaiprakashsharma506]

This video is wrong..

[@nuthinnew]

So if I make this and scrap the red LED, it will basically be a low level indicator? Because that's what I need

[@newrohitexperiment1234]

Super video bro 🙏🙏🙏🙏

[@NicoYoshimitsu]

Its working! thanks!

[@godsgiftpeter614]

Please were can I connect the supply on the circuit to charge the battery?

[@gsp2157]

Thank you bro, I understand the connection but I can't understand the testing process by using mutimeter...

[@techsartamil4529]

Multimeter find voltage level.

[@judelerai]

Hi can you show us how to realize passiv cell balancing system for a 4S2P battery 18650 , load to 100 % SOC

[@amarendrag1178]

Where should we give charger and where should we give load i.e 3.7V battery. This is not explaind properly. Could you please explain it to me here?

[@DIYTechnicianRM]

is se battery ko charge kr skte hai kya

[@Alin001]

What kind of pasta you use because you soldering very quick.

[@shivambhashkar5683]

battery level indicator waale video me 'BC 546 ka use kar sakte hai ?

[@pakomerrr]

Ante todo muchas gracias por tu vídeo. Tengo un proyecto que me gustaría terminar, se trata de 2 baterías (18650), montadas en serie con su correspondiente BMS, deberían cargar a 7.4v. , tengo un cargador que me dá aprox. 9v. (que pienso sería idóneo), pero lamentablemente me falta un circuito indicador led que me acuse cuando la batería está cargada al 100%, Tendrias alguna solución a mi problema? Muchas gracias y un saludo.

[@creativeindia6068]

Thanks for your help bro.....😍😍

[@pakomerrr]

First of all thank you very much for your video. I have a project that I would like to finish, it is about 2 batteries (18650), mounted in series with its corresponding BMS, charged at 7.4v. , I have a charger that gives me approx. 9v. (which I think would be ideal), but unfortunately I am missing an indicator circuit led me to accuse myself when the battery is 100% charged, would you have any solution to my problem? Thank you very much and greetings. 👍👍

[@makathi1234]

Where to connect the battery for charging , plz reply

[@guillermoseijo2437]

sorry no entiendo donde se conecta la bateria? aqui solo hay una conexion y no se ve a donde va la corriente de carga.

[@matthewbollinger9205]

Will this work on a game boy color with the rechargeable battery mod? Can I wire it directly to the lipo battery?

[@klefskill3327]

Can I request sir diy blinker for mountain bike using 6 led from lamp shade, power source is from power power bank.tia

[@iqbalabubakar9132]

Transistors konsa he oska name ya nmber?

[@clarkboocclaridad2993]

Supply voltage not specify. How many supply voltage should be use?

[@luckypietrodlion3258]

incomplete info, he's just just showing how to make a blinker.

[@diydb5069]

I supposed you are referring to 18650 battery if that so then 3.7v is nominal and 4.2v is full charged

[@skyinfochannel2836]

Dear does this circuit support auto cut off system?

[@pablog76x90]

I can't find the circuit on your website

[@chongshenchang9367]

Which is input and which is output...?? Should mention it if you are showing it to the people.

[@sdsourav9598]

Great man

[@nsmadhvendra]

sir, can 1k rasistor be used instead of 220ohm resistor or will you have to do 220ohm only, other than this rasistor cannot be used. please reply.

[@ommarchityin7282]

Very Nice

[@risnusyuhada2237]

What components should be changed if the green LED becomes 7.4 volts ?

[@hareshzinzuvadiya7777]

which wire is contet 3.7 betari

[@dani777dani]

full charge is 4.2v, 3.7 is nominal

[@lizmitchel8855]

3.7v=20%

[@odio_stationofficial3420]

@@lizmitchel8855 3.7v=96%

[@vishnusheel3639]

Resistance kitne kitne watt ka hai

[@techsartamil4529]

Resistor 1/4 or 1/2 watts enough !

[@test-193]

********** Liz Mitchel and Odio_Station Official are both incorrect. ********** 3.7 Volts is the "nominal" voltage for an 18650 lithium ion cell. (Although some 18650's specify 3.6 Volts as nominal.) If you carefully look at the discharge curve, you will see that 3.7 Volts is very close to 50% SOC (State of Charge). I don't know why Liz says 20%??? Or why Odio says 96%??? That doesn't match the manufacturers' specification sheets. The correct information is 3.7 Volts = 50% SOC. (with some 18650's specifying 3.6 Volts instead of 3.7 Volts)

[@makathi1234]

Please show the circuit with wires for connecting battery

[@bhupendradesai3402]

Sell ko dikhaya nahi current kise diya vo bhi bataya nahi reply for fartdhar subscrib

[@ridho007ful]

can i use your charger circuit for Battery NiMH?

[@kingjilheartbeats]

I think u could connect relay parallel to green led to cutoff over voltage

[@techsartamil4529]

Ok... Relay work good. But use 3v relay.

[@lagaffe38]

good job

[@amarkumar9069]

Bhai green led k sath 1 k ka rasistance to lag hi nhi rha....usme third line red nhi h

[@skycheterlockhack4847]

Om kalau untuk charger baterai vave bisa ga ??

[@electronic7979]

Excellent project

[@macklonpereira7437]

What will be the values of all for 4.8v charging battery

[@gaganvishwakarma6494]

Can we take transistor from nokia mobile charger

[@junreysotto4362]

Sir where or what gadget have transistor bc457

[@bhanuvarun7731]

In home appliances transistor we can't find so we buy from online shopping

[@surajbhannirankaricolonyma1283]

Sir, all you & other video maker, they are not showing charging from which either charger or transformers. So it very bad. Infuture all are requested that please show each & every input & output wires. Thanks.

[@constantinjitariu1439]

A full charged li-ion battery means in the battery you will have 4.2 V 3.7 V means the storage voltage of the battery

[@princesharma2054]

Which wire we connect to battery and Dc

[@cuteanimals4069]

very good

[@Ruzgar_K_]

Can i use 330ohm resistor?

[@mirzazaved6719]

Battery lagake check karo, Keya changer remove karke dekhna hoga.

[@UnknownPerson-nl7te]

can I use a C945 Transistor?

[@iamanubisss]

1k res use kr sakte h only

[@nyambeglen3395]

Thanks for the idea champ

[@hanymagdy2095]

Good evening, I want to know the voltage inside the circuit, how much volt it is, , and it takes a few hours to charge .thank you

[@alioz4831]

Süper.

[@rafaeltellez5414]

a quien va dirigido estos videos a ingenieros??????? no lo creo y como se carga con corriente alterna corriente directa o energia libre? y lo mas importante como se conecta. lo que es mas impresionante porque dan deditos arriba esto si es impresionante saludos

[@ersinduzenli1147]

What is the input voltage?

[@ngubengideso5758]

bro, besides the BC547 transistor can or not?

[@sjtechnology447]

Superb sir. Short and sweet.

[@rajnikantrathod1969]

लगता है इस चाचा को EVM पर पूरा भरोसा है

[@girishpatel8515]

Y don't u add some readable schematics ? So we confirm working principles ?

[@UnknownPerson-nl7te]

These people don't know anything,just make working and cheap projects but don't have any knowledge about electronics...Just make using datasheets and youtube tutorials

[@maskotea755]

mister aku mu tanya nih boleh kan? klo lampu led yg dipakai bohlam philips dll,itu voltnya berapa ya ?

[@wendersonferreira5434]

Muito bom meu amigo, vc tem esse esquema para 12v ?

[@Mini_vlogs_1236]

is it okay to use C945?

[@Valdeilson1234]

Serve Para Carregar duas Baterias de 7.4v

[@oscarfurno5000]

se podra utilizar BC550?

[@NumerologoAlvarot]

EXCELLENT VIDEO BROTHERS BE CONTINUE MORE TUTORIS

[@exgenica]

Using a method where the human has to interpret whether or not the LED is at "full" brightness is not ideal. Too easy to make mistake. Needs a definite threshold with LED either ON or OFF...no "in betweens".

[@alibehrouz9833]

great.I wish you had shown a schematic thanks

[@bhagwandash9258]

Can used 548 transistor

[@SarrouTube]

This is true for lithium and alkaline batteries?

[@AliElectricBangla360]

so nice

[@mithhukashyap6802]

Charge Ac voltage se krenge ya mobile charger / DC voltage se Please reply me very urgent brother

[@mithhukashyap6802]

Are Bhai jldi reply do

[@hewadsaad1378]

See buck converter

[@hewadsaad1378]

Or slep down transformer with fullbridge rectifier and a capasitor

[@Freakengineeryt]

Dc charger se

[@majidali4262]

You have not mentioned output wires.Schematic is also incomplete.

[@bam-o5l]

Yeah..how much the power source (in put)

[@majidali4262]

@@bam-o5l 4056 charging module it far better than this headache.

[@bam-o5l]

@Majid Ali Tks for your recomendation..

[@junreysotto4362]

Can i use b562c transistor

[@basuroyal2783]

does kt work with 3 battery??

[@fanselectronica5718]

Full carga 4.2v

[@djproductionkk6118]

Register are half watt or quater watt

[@ismaeldossantos3296]

Just buy a multitester and you can test any battery.

[@prabashwijayarathna8019]

What changes for three 3.7v batteries...?

[@k.pal1399]

Say's that tha what type transistor you used and it's value?

[@dingski_diy]

very nice, how about 3.2v for lifepo4 sir?