Battery Charger / Power Supply

This is a nice inexpensive down converter that can be used for a power supply or a battery charger.
Check this idea out: You can charge your project battery with this module then simply turn it around and run your project using the converter as the power supply. In this way you can set it to any voltage for the project and add the amount of current limiting you need to be safe. You probably don't need a fuse on the battery anymore.
ICStations information:
www.icstation.com/current-volt...
5V-30V 5A Red Current Voltage Display Step Down Module LED Panel
This discount code may apply for 10% off. (one time)
Code: Dadics
SKU: 2455
Description
Module Properties:Non-isolated step-down module
Rectification:Non-Synchronous Rectification
Input Voltage:5V-30V
Output Voltage:0.8V-29V
Output Current:Max 5A (over 3A to enhance heat dissipation)
Conversion efficiency:95% (the highest)
Switching frequency:300KHz
Output Ripple:50mV (max) 20M Bandwidth
Load Regulation:+/-0.5%
Voltage Regulation:+/-2.5%
Operating Temperature:-40℃ to +85℃
Size:51*26.3*14 (L*W*H)(mm)
Module Name:Current and voltage table
Measurement Accuracy:0.1%
Refresh rate:About 200ms time
Display:Dual 4bits 0.28" digital tube
Current Range:0A-5A
Voltage range:5V-30V
Operating Current:Less than 15mA
Display Color:Red
Storage Temperature:-10℃ to +65℃
Input impedance:50 milliohms
External dimensions:51*26.3*10mm
Rechargeable lithium-ion battery
When the lithium-ion battery voltage is relatively low, if the direct use of constant voltage charging, the voltage difference due to the larger, leading the charge current is too large, resulting in damage to the battery, so when you want to start using the constant battery current charging, when the charge to a certain extent automatically switches back when the constant voltage charging.
Module above indicated IN-(input negative), IN+(positive input), OUT-(negative output), OUT+(positive output) must be connected to the right, otherwise may cause damage to the module.

[@billbailey4615]

Hi John i am new to experimenting.actually youtube recommended your video's.your a great experimenter.your motors are so quiet and the tips you share are always superb.you just saved me money on a variable power supply.thanks for sharing and please keep up the great videos.thanks you tube if your watching.chuckle

[@DadHav]

+bill bailey Hello Bill, I'm glad to be useful.

[@TrustingJesus67]

Neat little unit. Nice explanation. God Bless

[@brucewayne-cave]

Thanks for the review.

[@Edmorbus]

Thanks for sharing

[@logan3456]

Thank you,was looking for way to charge different batteries from my solar panell

[@cani5002]

I want to know if this works for me. i need a 5v 0.5a converter at the input and 5v 2a at the output. If not, do you have any idea how I can do it?

[@diydan6045]

I'm looking to change 12v NIMH batteries. The packs are 10 1.2v NIMH in series making the 13v 3700 ma. I want to put two batteries in series to make it 24 volts and then 10 in parallel to make one battery pack. What type of charger could I use?.

[@billparsons7732]

Is the top 7 segment display missing a segment on top of the zero?

[@69Atho]

Thats a great little unit John. Thanks for the informative video.

[@DadHav]

+TinManPower Hi Buddy, I just thought of something. You can charge your project battery with the converter then just turn it around and power up you project with any voltage and current current limiting. No need to use a fuse.Take care.

[@MrBrymstond]

There's another way and I believe a better way of setting your amperage (Current) is to use a multimeter, switch the pos over to the 10adc side and connect the wire coming out of the buck converter to the pos probe on the multimeter and connect another wire to the neg probe on the multimeter and hook it up to the positive on the device your powering and adjust the trim pot as needed. I use a lightbulb to set the current

[@MrBrymstond]

Also if there's two lithium ion batteries in the case the max voltage will be 8.4v wired in a series, but when you put a load on it, it should be running at 7.4v so check that voltage going into the camera. Over Voltage will kill your camera prematurely.

[@DadHav]

Thanks for the tips and ideas friend.

[@BeetleJuice1980]

My module gets extremely hot to the smd resistor at the lower pcb when it draws over 1,5 Amp. You all should try your modules. I believe that resistor must be replaced with a non smd resistor with higher wattage. It seems is the resistor who is used to measure the current so all amps pass through it.

[@tonyglez165]

Very Good info vid, can I use a household car battery charger (12v-10A)together with this buck converter to charge my Dji phantom 3 battery.(15.2v-4.4A)

[@drchan5893]

you should be using a diode on these modules as they are not isolated especially when charging batteries its not hard to cut the wire on the power out and solder one on.

[@allinthefamiliy3122]

Has any one ever figured out how the serial interface can be used with a microcontroller. It has a TX RX interface, let me know if you know something about it

[@dilshankasthuriarachchi4737]

Hi there could you please tell me how to give input voltage here i mean can i use only the computer power supply only?

[@chbonnici]

Nice video Thanks. What are the top sockets for?

[@brianroco1093]

Thanks!

[@ifyouwantpeaceprepareforwa4329]

How to set the amps and how to connect the wire for to test the amps

[@krishnakumarphy1]

Hi Solar panel open-circuit Voltage: 40V Battery 12 V (AGM Controller : PWM controller max input voltage 28V I need step down from 40V to 25V and connect to solar charge controller to charge the battery? Will I lose energy in this converter in step down mode? Or the module will convert in to Amps from Voltage while step down? Can i use this module to connect to solar panel and then output of the module to the solar charge controller which then eventually charge the battery? Thanks, krishnakumar

[@Spartan224.]

well , its kinda late.. but love it , tbh , i just bought one , here , in Romania , idk if the quality will be the same , but it will be used for a DIY 5v(maybe more in future) solar circuit whit a DIY 20000mah battery and some solar panels for few garden lights haha , hope its goanna do the job , thanks and nice video ,

[@cest7343]

Howdy there Sir ;-) great information there. got quite few of them one with and one without the led digit panel. You seem to have missed to mention that they pack a poly fuse too. Once blown - it magically heals when cooled down :-) My greetings to all and a bow with hat tipoff ;)

[@DadHav]

+Cest 73 Hey Friend, Thanks, I didn't know that.

[@cest7343]

+DadHav i found out just by (t)error - reverse connected a battery. while waiting for a spare to arrive, found that the killed one - survived...

[@DadHav]

+Cest 73 Ha,ha ha, that's the kind of surprises I like.

[@25227168]

Just ordered this for my car pc thanks for the great video John

[@DadHav]

Dan, I hope it worked out for you.

[@25227168]

had to use something different in the end as the amperage output was too low for my means sadly.

[@DadHav]

I hear that. Nice little unit but more for small bench experiments. You might want to think about using it as a trickle charger for a car that is stored for long times in the winter.

[@logansaunders585]

thank you,which one you'd chose if you want make solar back up kit

[@georgechristie235]

Logan Saunders .

[@yashverma9678]

What is the function of the molex connector (white colour) on the top of the module???? I think they are used for serial communication purpose..... But how to do it any idea?????

[@DadHav]

Someone told me the top board was used on other modules besides this one and that they are not a function of this one.

[@curtis1336]

these are handy, i want to know what the serial port is for

[@DadHav]

I haven't found that out. My guess is the readout board is used on several different modules and one might output to the port. I'll check with a scope to see if there is anything coming to the port on this module.

[@elamaier4070]

i see you are very good with this stuff, so do you by any chance know how to change a battery watch and usb also to normal plug in watch.The batteries go to fast and i would love to find a way to just plug in the watch to an outlet. Thanks

[@DadHav]

+Ela Maier Ela, This is just an idea but why bother plugging it in? If you soldered wires to the positive and negative contacts in you watch you could use a flashlight battery to run the watch right? That might run the watch for years. or at least one heck of a long time.

[@ExtantFrodo2]

+DadHav Dead straight! The battery would probably last past it's shelf life running a watch. The draw is almost negligible.

[@g7mks383]

Hi, Much over a charge voltage of 13.8 volts on a 12 volt battery will boil it.

[@DadHav]

Hi Martin. I always charge lead acid batteries to 14.7 volts as set automatically on all my computer chargers. I think if you do a search you will find the recommended charge voltage is from 13.8 to 14.7 volts. I'm sure you know the battery isn't boiling when hydrogen bubbles are coming off the plates. Thanks for commenting.

[@atiqurealiborah4462]

i have a 12v 20amp power supply so can it be adjusted to 14.4v from a 12v power supply to charge a battery

[@DadHav]

Hello, This is a down converter so you need a higher voltage on the input than what you set the output to. You might want to look for an R/C hobby battery charger. You can set the voltage at most anything you want and run it from your 12 volt supply.

[@atiqurealiborah4462]

Alright. thanks for the reply.. i will find a higher voltage charger then

[@BeetleJuice1980]

Have you found out what these white connectors on top screen do?

[@DadHav]

Someone commented that the connectors are a computer interface when the display board is used on a different device.

[@ExplainingMathematics]

after its fully charged, does it automatically stop charging? to avoid overcharge. cheers

[@DadHav]

Sorry I missed your question until now. As the battery reaches full charge it will lower in current draw and eventually reach near zero. A defective battery might continue to charge.

[@davoodzarei695]

❤

[@WoLF-uu8hr]

Can tou charge lithium battey 18560 on this device directly?

[@DadHav]

You should be able to as long as you set the voltage and current settings correctly to match the battery.

[@franz-motovlogs3516]

can we make this as a replacement charger for 21votls cordless grinder

[@DadHav]

Hello, If the batteries in the grinder are lithium I wouldn't advise it. If you happen to short the battery by accident it might start on fire or worse.

[@flnthrn2]

It's not a "charge" indicator. The blue LED means the output is being current limited, in stead of voltage limited. There is a red LED next to the blue one to indicate the voltage is being limited, in stead of the current.

[@DadHav]

It's a little confusing about the LED's. You almost don't need them because you get all the information you need from looking at the display right? The blue diode turns off and on for me at about 60 Ma. In other words if I set the module to charge at 12 volts and 200 Ma. When I start the charge the voltage drops and current is 200 Ma. (Current is kept at 200Ma by dropping the voltage) As the battery starts to reach full charge the blue light goes out when the current drops to about 60 Ma. but is still charging slowly. There was no current limiting going on at this point. It was set but not being used at this stage of the charge cycle.

[@harukoyama9515]

Is there a different between AC amp meter and DC amp meter?

[@DadHav]

Hello Friend, Yes there is a big difference between AC and DC. and as far as I know you need a meter that you can select either mode.

[@Lskaggs63]

John, I may have missed it in the video, where can I get these modules and how much do they cost (USD)? Great Video, Thanks!

[@chbonnici]

this unit can be bought from ALI EXpress for USD $3.39c see website: www.aliexpress.com/item/32891951875.html?spm=a2g0o.cart.0.0.3b713c00dtYhR3

[@MCsCreations]

The problem of those XL4015 is to replace the potentiometers to external ones. Burned two XL4015 boards trying to do so. :(

[@DadHav]

That's a good idea.

[@MCsCreations]

DadHav Yeah, it is. And the project box with the potentiometers and voltmeter ammeter turned out beautiful! Too bad it didn't worked out. :(

[@BeetleJuice1980]

@@MCsCreations why it didn't work? You used multiturn pots?

[@MCsCreations]

@@BeetleJuice1980 Sure I did... But still... 😕

[@BeetleJuice1980]

@@MCsCreations what happened then? It doesn't work?

[@khalida.s.4649]

I have a few questions about battery charging that is puzzling me. I have an Italian expensive 12/24 volts charger. Lately, it ruined my weak battery and it went down from 11.6v to 4.5v, even though they said it was safe with automatic switch-off for battery protection. Q1 : Is this battery history? Q2 : Is it correct that the charger's output must be above the battery's volt level in order for it to be effectively charging?

[@DadHav]

Typically a 12v lead acid battery will be fully charged at 14.7 volts and some chargers will even go up to 15.4 even though they are referred to as 12 volt chargers. Usually even batteries in bad shape will come off the charger looking like they are fully charged but as soon as they sit a while will settle down to their resting voltage. If your battery is dropping down as low as you say there may be heavy sulfating or damage of the plates. If you are talking about NiCad or NiMh there are different things to consider. Usually the condition you describe means the batteries are permanently damaged.

[@khalida.s.4649]

Thanks. I was trying to make sure what the charger's output must be in order for it to work effectively. Do you know if a charger with 11 volts would be able to charge the battery though? The charger that apparently ruined my battery is 12v/24v with Boast switch. When I measure the output, it's 11.3 on regular and 12.1 on Boast! I think the Charger voltage MUST be higher than the battery's just a little bit in order for it to be effective. Can you confirm this assertion? or oppose it..

[@DadHav]

Yes, Khalid. If you are charging a lead acid battery the voltage output from your charger must be high enough to get the 12 V battery to 14.7 volts before it automatically shuts off or goes into a storage charging mode. That is of course if your charger has features like this.

[@khalida.s.4649]

I tested my new battery and when it's fully charged, it measured 12.7v with the car turned off. It also measured 14v when the car is running because the alternator was charging it. Not sure that a car battery can ever measure above 12.7 when it's not being charged. My main issue though is this : Can a charger be useful at all if it's charging a voltage that is less what the battery's voltage is? example: battery is measuring at 11.5v and the charger's output is measuring at 11v.

[@DadHav]

I would say it's normal for a car battery to measure 12.7 volts after resting. If you leave an 11v charger connected to your battery, the voltage of the battery will be 11 volts eventually and stay there.

[@AlienRelics]

Do you know how to use the white connectors on the top board?

[@DadHav]

+Steve Greenfield....I couldn't find out to much about them but I was told the three pin connector is a serial interface and the other not used on this module. My guess would be if you had monitoring software on the computer and the right interface cable you might be able to graph the voltage or current ups and downs.

[@AlienRelics]

On Alibaba, one of the pictures shows the connector with more pins connected to a laptop battery. I had noticed that the 3 pin connector is labeled RX and TX, and that it is wired to the hardware serial ports on a microcontrolller on the top board. You are probably correct and it is likely just a constant serial stream of data.

[@malayalamtechmedia7467]

Display not working

[@charlesw318]

can I charge a12v car battery worth this

[@DadHav]

+Charles Williams Yes but you first need for an example a 24 volt transformer to run the charger module. The charge would be slow at 2 amps or less to be safe but it should work. I thought about using one set to about 13.8 volts and around 200 Ma or so for a winter battery tender.

[@charlesw318]

Why a transformer

[@DadHav]

+Charles Williams The unit is a down converter and requires a higher DC voltage goin in than what the output voltage is set at. By transformer I really meant a DC plug in power supply. the power supply should have enough wattage to operate the module at your required charge setting. As an example I use an old laptop power supply on the input. this supply has setting for 12 to 24 volts and I use the 24 volt setting. The power supply is 3 amp but I never need that much.

[@charlesw318]

OK thanks for your help.

[@jmac430]

How large of a resistor did you have to use?

[@DadHav]

Hello Jesse. I have a 1 ohm 50 watt 1% resistor that's in a heat sink. I normally use it like a current shunt to measure amperage.

[@georgechristie235]

Jesse Mxxz cLennan z

[@rusenali6946]

Is that automaticly stop voltage when battery full charged?

[@DadHav]

+Rusen Yiyici ....Yes the current will lower and stop as the battery reaches full charge.

[@rusenali6946]

+DadHav Thanks. I will use this for 18650 battery other lithium ion lithium polymer batteries. I bored to TP4056:) I subscribe.

[@DadHav]

+Rusen Yiyici .....Thank you Rusen. That should work OK for you, just set your voltage appropriately. LiPo's can be dangerous if over charged.

[@rusenali6946]

+DadHav Thanks for advise.

[@dilshankasthuriarachchi4737]

Hi there how to give power to this?

[@DadHav]

6 to 40 volts DC batteries or power supply.

[@6teeth318]

What kind of resistor are you using?

[@DadHav]

+Jan Demant ...Hello Jan, The resistor is a 50 watt 1 ohm and it comes with a heat sink. I sometimes use it as a current shunt. Sorry, I should have mentioned that.

[@6teeth318]

+DadHav Ty for reply.I seen those many places i`m just not sure what purpose they have . I learned something new.Ty.

[@guyzzemf1]

like

[@5-minuteEnglish]

If I input 5v. Can it output 15 or 20v.?

[@DadHav]

Sorry it's a step down converter so you need more input than output.

[@englishrupe01]

You need a boost converter....maybe like this one : www.amazon.com/Onyehn-LTC1871-Converter-Adjustable-Regulator/dp/B07GJDNKG9/ref=sr_1_21?crid=OZULPOVUB43V&keywords=boost+converter&qid=1563311596&s=electronics&sprefix=boost%2Celectronics%2C266&sr=1-21

[@englishrupe01]

If you are very new to this, this dc dc converter is great value as it does both boost and buck. You have to wait two or three weeks to get it, but it is well worth the wait: smile.amazon.com/gp/product/B07L49MRGW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1#customerReviews

[@gilbertsprojects2954]

Hi, great video! Just one thing, when using led displays (like these 7 segment displays) you can use a piece of red electrical tape to make it much easier to see with the camera. Hope this helps in future videos... please also check out my videos, thanks and have a great day! 😃

[@DadHav]

Thanks for the tip friend.