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That's why when battery voltage go below 3.7V the output bump from 30V to 51V, but I put in series a 3K resistor and output current doesn't increase much. Work well as Led tester

Good video lecture. Lovely details. Thanks for sharing.

Can the variable resistor be replaced with a potentiometer? What value?

Anything over 3.365v is not ideal for lifepo4 cells...seems that bms had setting for lipo caells (3.7nominal)

I have a small solar panel in my shed with two 8inch fans. Problem I have is every morning I have to turn the fan off and back on to get them to spin fast. I want them to run by themselves without having to turn them off and on everyday. How do I fix them? What can I buy? Thanks

Maximum flash rate? Will this go up to say 50 hz?

my favourite wire, EARTH wire.

When i am rotating the variable resistor it is sometime not working and some timw getting hot when turning the voltage low but sometime not while the lode is the same why?? And one more question Does variable resistor get reset everytime it's power is disconnected?? In my case or appear like it ia getting reset everytime i am disconnecting the power. Also it keeps spinning so how do i know that when it has reached its max or lowest limit??

Should've insulated the individual cables aswell, otherwise you'll ruin the phones battery, might start a fire aswell

Nice video with all the demonstrations! But have you actually measured anything above 99mAh? I have two ZK-5KXs and both of them have the same bug, they measure capacity up to 99mAh and then, instead of continue from 100mAh up, they simply reset to 0mAh and start counting again, rendering this capacity function useless... Have you noticed it? Thanks

Thank you so much you have no idea how that simple understanding help me feel confident in the relation to volts and ohms.

What about using a normal 5v version without the booster. If connected to a capable powerbank. Will it only output 5v? Im trying to find usb version so i can charge my bt speaker. But its a variable V, so can go upto 12v but i need a usb cable that will power or charge my speaker from a powerbank rather than a mains plug.

Would it be possible to turn this converter into a high voltage converter. I have an application where i need 3000 volts but I do not need the high power.

I have a 21W halogen bulb. I set it to 12V 3 amps and give energy to the bulb. The output turns off and appears 0V, then after 4 seconds it gets back up and lights the bulb. I set it to 12V 2 amps and it lights it without shutting down. I can't see any protection sign on the screen, what do you think is happening?

thanks..

HAVE YOU USED EAGLE FOR THIS

@techgyan9291

but my load is 1000watt and i want to use this neon bulb as an indicator of it wont the 150k resistor burn out if it is connected in series

Hi. Why the primary is winded with 2*100 turns and not 1*200? Why is it necessary to split into half? Thanks!

Good knowledge

Neatly and organizedly done video thank you for posting it.

Is the ic FM34093

Hi, how to make it with CT output? thanks

you're garbage

can we use 5 v charger pwm ic to make 12 v smps

Hi, im confused about the 100w 4pcs life4po battery & the ups is around 300w 650va, so in these case you need 12 life4po battery in order to get the 300w? Thanks.

Very useful thank you so much bro😊

The fukc did I just watch? It's not even in sync with the audio. I don't even think the audio is for this video what in the Willy Wonka fuck is going on here

Can you tell me? What program do you use to calculate the number of turns?

When the IC starts to be powered from the coil, electricity will also continue to be supplied to the IC via the charging capacitor at the bottom. Doesn't this constitute two power sources for the chip over voltage? How was this case dealt with? Thank you.

I would not recommend the lazy method as you could potentialy damge the cells. the current could be very high

It helped me greatly. Thanks alot

Can't you plz explain the calculations of ic vs transformer?

Hi, nice job :) but i have some questions. i have battery 11,1v , is it posible this schematic will work with it? Thank you.

How to build a ups life4po using a battery charger(store or made) and invertor(store purchased). Cover main to invertr circuit.

How did you calculate primary and secondary truns

No op amp added with the input. Can we add op amp on the input. Will it improve the sound quality....?

i saw this module in other video who done all experiences and test to improve that this module xl 9006 the maximum amps that give is only two Amps .

Exquisite guide man. Cheers from Uruguay.

hi how do you calculate the winding required for transformer? i am little bit confused.

i have 1 of this but i Accidentally connect it to the battery at the wrong polarity and the result is it Cant charge any battery now

Have you done a rundown test, i.e. pulling 200 Watts (or 500), how long your unit stays on for? I'm trying to figure out how efficient (or inefficient) UPS's are in getting power from batteries to the load (i.e. how long should a UPS run with a 24v 100 amp hour LiFePo4 battery at say a 200 watt, 1.5 amp load - got only 45-50 mins with 75 amp hour Sealed Lead Acid)?

hi you presented this very nicely. i have issue with same IC. my circuit has little bit difference. i am using extra transistor along with TL431. my issue is with short circuit protection. after 800mA current viper22a blast. also do you expalain about electrical load you use in every video?

Thanks a lot for valuable information.. Keep it up ❤

Hi, so one of my headphone speakers does not show any resistance. What do I do next to figure out where the wire broke insides the actual speaker? Thank you.

Russian resistors?

NICE JOB DUDE . GOOD SMPS TO SHOW BOARD AND PARTS. GOOD IDEA TO DISCHARGE FULL BRIDGE RETIFIER FILTER. CAP FIRST. THEY ARE USUALLY 4.7 UF - 10 UF @ 160 VDC AND UP. KEEP UP THE GOOD WORK !!! 😊😊😊😊

Thanks for your valuable video.

will APC ups with 2 batteries (24V) works fine with LiFePo4, does the voltage match without any circuit modification so they will get full charge and discharge protection?

You are one of the best SMPS expert. God bless you.