วีดีโอ

Thanks so much

Yes, why not. this is a very low noise supply

how much is the inductance of the primary in your transformer?

how much is the inductance of the primary in your transformer?

These chips are all protected against short circuit

@@MyVanitar Not true. Look at the schematic. When output voltage is lower than input (short circuit condition) there is direct current path through inductor and diode. It should have at least a fuse on input power line to avoid major disaster.

it depends on your input supply. also when the input drops below 5V, the chip turns off. Maybe the EN pin can also help, but for my case and purpose of this circuit, disaster never gonna happen

usually, a boost converter is more noisy than a buck. check my latest video. although the current is low, it shows a square wave ripple. a 470uF input capacitor does not cause such an inrush

@@MyVanitar Well i guess that the inrush current depend on the ESR of the cap. What formula did you ude to calculate each components values like input and output cap, and inductance?

if you want other output voltages, simply change the feedback resistors. also, be careful about the voltage rating of the output capacitors

@@MyVanitar yes I understood.

Thank you Neil 🙂

Thank you! Cheers!

Most welcome

I am agree

go ahead and build it

for this project, the link is inside the article which I'll put the link to the article later on, however, from now on (whatever is published after this), the link to the Altium-365 project will be provided directly in the video description.

test it, it works :-)

you've made a mistake somewhere, I'm sure. check again (both video and the article).

@@MyVanitar ok thnx for the reply

@@MyVanitar I did every step as the vedio mentioned and I am getting the error pico/stdbio.h no such file or directory

how do you run the VSCode? from which command prompt?

I don't know, but a voltage glitch (on/off) probably caused this, because they calculate until their power is connected. to avoid this, you have to store the latest data on an EEPROM or something, every 1-2 minutes for example

nothing. it calculates based on the input voltage and current, however, I'm thinking about the capacitor-based supply for the chip (not the chip itself), that might cause issues if the voltage drops too low

I have another design as well, V2. check my videos you will find it

@@MyVanitar yes most of our meter lost stored energy on voltage drop areas , due to what reason happen or which electronic component causes

This is not the problem of the meter, it can be easily solved to handle even as low as 85V-AC

Bingo

Glad to hear that!

12V-4A means 48W. The maximum power of this Flyback chip is 24W. if you have a project request contact me via Email

@@MyVanitar i'm a college student and i wanted it for my for my project this semester, just having a trouble adjusting output voltage and current and controlling them separately . sadly i can't afford a project but i would really appreciate any tip you can provide .

I have a 12V-7A version on my channel. check the details for your info. The output of these supplies is not that much adjustable except you use a buck converter at the output

@@MyVanitar thanks .

the same as a technical class in the university?

Let me reply in English. Just follow the link in the description and activate your free legal license. if you did not upgrade, it doesn't matter, you can download projects from Altium-365. I'll put a link to the article later on where you can find the 365 link as well

I did not get what you meant, what's the problem with this layout?! when the copper is enough, it won't heat noticeably. open a channel and show your professional projects and do things properly!

​@@MyVanitar I was talking about PCB traces layout. Traces where you sense voltage drop on shunt resistors. I'll be happy to continue discussion after you have a look on some doc. Please search for AD's document optimize-high-current-sensing-accuracy.pdf and have a look. That's much more close look how to properly do tracing, while on your PCB it's far from proper approach. Do not get me wrong, I'm watching your channel not to make critics. I've just spot this and want to pay attention. Will be happy to continue discussion.

@@MyVanitar ​ I have to repeat a lost comment. I was talking about PCB traces layout. Traces where you sense voltage drop on shunt resistors. I'll be happy to continue discussion after you have a look on some doc. Please search for AD's document optimize-high-current-sensing-accuracy PDF and have a look. That's much more close look how to properly do tracing, while on your PCB it's far from proper approach. Do not get me wrong, I'm watching your channel not to make critics. I've just spot this and want to pay attention. Will be happy to continue discussion.

The "maximum" power dissipation on the shunt is around 1.25W. the shunt is rated at 6W. can be increased to 8W. Resistors on the source pin of the Mosfet are rated at 12W and can be increased to 16W. maximum power dissipation on those 4 resistors 6W but they won't affect the current reading. This can be even improved if the value is decreased but the user would miss low current adjustments. Load ground and input ground are also common. current sensing is the high side method. if you mean the traces from the shunt to the chip, they are short and identical

​@@MyVanitar I'm sorry, but you are still wrong and/or do not understand what I mean. Did you found the pdf I mentioned? Read it please! Your math about shunts wattage does not eliminate the fact that traces for main current sensing shunt (R9 || R10) are placed in a way that violate well known, proper tracing. Those sensing traces literally should go under shunts and have to be connected to internal side of pads where they soldered. Not like you have right now on one side which we see, it's even on some distance from soldering pads!

Thank you 👍

@@MyVanitar 🙋‍♂️🙋‍♂️👍👍👍

Thank you. I will provide the article link as soon as it gets published. by the way, watch the video completely till I put that link because you get values from both.

Thank you. I will provide the article link as soon as it gets published. by the way, watch the video completely till I put that link because you get values from both.

@@MyVanitar Thankyou for the reply, sure watched it fully , thankyou for your wonderful explanation of the design as well in the video .

My pleasure 😊

Not a screw, but a plastic washer

@@MyVanitar I meant a nylon bolt. If you use a metal bolt and a plastic washer it could still short out

whatever I say you make your assertion :-), no problem, use that bolt in your designs

please do not comment without watching the video!

@@MyVanitarDon’t be a jerk. I watched the video and that’s why I gave advice based on my experience. All the manual work of installing everything individually has been replaced by one click installer. What was wrong with my comment?

man, the first step of this tutorial is about installing that package, but that package is out of date, that's why we should update some parts. Please watch the video completely and be polite, I don't owe anyone!

I will put the article soon in the description, then you can read more and see the specs

Thank you! Cheers!

unfortunately, I'm not from India and I don't know Hindi

@@MyVanitar So , I would like to suggest that you should learn Hindi.

No, maximum 90V-DC

@@MyVanitar any buck converter support 200 v dc?

I can design it for you as a premium project. also, I have some designs that can get 230V mains input on the channel, but the output is fixed

Thank you! Cheers!

I saw your Email and replied. yes, it's possible

Thank you :-)

You're welcome 😊

Thank you

Don't have article link

Yes, but it will be published as soon as possible and I will put the link there. you can read more and download the PCB from there

you should change some capacitors and the MOSFETs because your input voltage is higher than the voltage of these components

@@MyVanitar Thanks for the reply.The capacitors I have to change are C5,C6,C7 am I right?

@@upbgenoob5488 honestly the PCB should be modified to follow the higher voltage standards, but what I told you was the minimum action, otherwise those components will explode

in one case you read very low ESR and that's when the capacitor is shorted, which happens mostly for ceramic SMD ones. But in your case when the capacitance is okay, I am suspicious about your LCR (if it's a brand or a DIY) and the measurement frequency (use either 100Hz or 120Hz if your LCR meter is one of these, for the electrolytic-type capacitor is above 10uF). take the capacitor out of the circuit and test it again, it might be a resistor or an inductor in parallel.

@@MyVanitar The capacitor was already taken out of the circuit. I didn't make the meter myself but it is a cheap (under $30) meter from Amazon. I just recently got the LCR and this was the first thing I tried with it, so if it's not accurate, I'm not sure. I can't set the frequency myself, it's pretty much automatic, you stick the part in and hit a button and it does some things to detect what the part is and display info.

with higher frequency, the ESR value drops so I think your capacitor is fine, especially when you read 24uF. Test it with some faulty capacitors

@@MyVanitar That makes sense, so it's probably not using the ideal frequency for this capacitor so it looks weird. Thank you. I don't have any known bad caps around to test but I am trying to find bad caps on this board so I guess I'll pull and test some more and see how they look.

usually, the frequency of such devices is fixed at 100KHz, used by many manufacturers and datasheets to show the ESR, and also for marketing to show the ESR of their components is low. those online tables are rough estimations and they do not mention the frequency. you gain experience with some repairs. mostly ripple and heat cause the capacitors to fail

use an inductor with thicker wire, but the same inductance value. it will remain cool. for the shunt select a resistor with same value and package size, but more power rating

@@MyVanitar thanks for replying sir ..for inductor i use two nos 0.7mm thick wire

@@MyVanitar r increase the MOSFET adding parallel

Any suggestions sir

@@MyVanitar i use 1mm thick again inductor heating problem

I use an Arduino board to drive this board. I have published another standalone design as well. check other videos

@@MyVanitar Can I make a driver circuit according to this video?

Yes, it's easy. Your first job is to watch the video completely and read the article, it's much beneficial than wasting the time on social media

if the load is removed, the screen shows zero consumption. for overcurrent detection yes is possible, but it needs some modifications, on this PCB is not possible

no way to fix it, however, if the voltage/current variations are low. it might be useful. it means to calibrate it just to measure and show that specific voltage and current

no, go ahead

@@MyVanitar What is the inductance margin in the transformer to avoid any problems? Thank you very much in advance for your help

that potentiometer in the output compensates any small transformer error. 0.65 and 0.67, the difference is very low

@@MyVanitar Ok, thanks for the help