Voltage regulator tutorial & USB gadget charger circuit 

Nice profile picture! You got me

Excellent video tutorial... and hope he makes a few bucks along the way. ;D

@@BillAnt bucks converters are indeed covered in another video 😂

@Mike Gleason jr Couturier < Jokes aside, I really meant "...makes a few bucks..." he-he

manageable bites or bits? im confused...

this is so true, i just found this channel

you guys are so fantastic keep it up

Same here! Thanks Afro! U R Awsome!

KAYODE OLORUNTOLA k

you can buy books on line teaching basic elec and eletronics very basic but good ground work

Capacitors can be used in tons of different situations and the formula to use will depend on the situation. 10uF for a linear regulator is just a generally good guideline value. The best way to find out the value for your situation is to google for the datasheet of the component you are using. It will either show you the formula or give you the recommended value.

It depends on the regulator, the current draw, and filtering requirements which remove high frequency transients and voltage spikes from the load. The datasheet for the regulator provides the details for what smoothing and filter capacitors to use in various configurations.

Survival Lilly

Read the datasheet for the regulator you actually use, especially for low-dropout ones. Datasheets have specific information for the actual device so are the definitive source of information.

Fancy seeing you here Lilly!!! Love your videos!!!!

The difference in clarity and quality of this video compared to some others, is like night and day. Clearly flowing thought pattern, no mumbling and pausing, throat clearing, with a dash of well placed good humor in between. #Winning! :)

G O'LastName Well said! I wish this dude was my electronics instructor or had a full electronics video coarse available! I'd buy it in a heartbeat!!! As always, great job afrotech 👌👍

Whoops...video 'course'...I meant to say.

i like your pfp

man i am a big fan despite of the fact that i came across your channel last night. The content that you offer is best worth my time. i wish i could donate to your work but here i am trying to find my place in this world.But hey big shout out to you.Peace bro.

+Kris Kasprzak Thanks bud!

+Afrotechmods Hi! I have a Alpine 4-channel amp. Chan 2 is out.No sound But when I incresed the volume all i hear is cracking distorted sound. I opened the amp up found no burn Mosfet. What could be the problem? Any help is appreciated. Thanks!

+Bouboune The problem is that or amplifier output wattage is higher than the wattage of your speakers

its gone up to 253

i love his humor and thats what makes the video more fun to watch.

you can charge apple devices if you short out the data pins with a 50k ohm resistor. google it.

🎉

Thanks!

or maybe , they think that 10uf capacitor is a can of coke.

Woah. Which school was this? Post a photo!

@@Afrotechmods Its "Electrical engineering university Nis"

Thank you

RiaRadioFMHD773 Thanks for the tip!

haha i see what you did there.

thx a lot!

thank u

Can u plz explain the use of 79s

Gay you

In another youtube channel “chinese cooking demystified” sounds like he might be the same person 🤔 very clear and informative tutorials in both

Donald Filbert The 0.1uF cap is made with a different dielectric - it is a ceramic cap. The 10uF cap is an aluminum electrolytic cap. Ceramic caps work much better at higher frequencies. The 10uF cap would be useless at dealing with noise at 100+kHz.

Afrotechmods Cool !! Thanks for the response and info !!!

+Afrotechmods To the important in difference in dielectric is their ESR, Equivalent Series Resistance. In this circuit, ceramic's lower ESR helps the capacitor smooth higher frequencies.

+Afrotechmods so the purpose of that 0.1 uF ceramic capacitor is to further smooth out ripple in the output cause by higher frequencies noise?

Correct. If you go back and look at the Osciloscope, you can see that there is some noise in the output voltage. The 10uF and the 0.1uF capacitors help to clean up this signal. If the original author were to hook up another probe to the board on the output side of the capacitors (or even just move the probe) we would see a near flat output voltage from the circuit.

3:30 lol

Lmfao

@@someguyontheinternet- haha lol

You look up the minimum recommended value on the datasheet.

Thoughtyness C=I*T/V

I have the same question, what would happen if there werent any capacitors? or If there werent one of those...

So, they act as a noise filter? And the capacitance determinates the frequency they filter, right?

Sebas Eu Thanks! I will do a deeper research to fully understand the topic.

+Kique Phan Razquin Without Caps The curcuit wont be very stable. Its like using an LED. When you have an Voltage of 4v, you can theoratically connect a LED direct to it. But its still better to use a Resistor. Also i heard, that the Efficency suffers without caps. But if you dont care about Efficency, you can use it without caps. But i think everyone you will ask, will recommend you to use an 78xx with caps

AntoniRockReykern I think this is for reject the noise at 50 or 60 Hz. This is why to use 100nf capacitor

Krists Jāvalds Duracell "rip-off"

Kyle LaFountaine Yes

+Kyle LaFountaine yes, and no. That depends on your voltage regulation needs. In this circuit, ceramic's lower Equivalent Series Resistance helps the capacitor smooth higher frequencies, while the electrolytic capacitor is cheaper to provide the farads to smooth out lower frequency oscillations.

+Bob “bobdabiulder” dabiuld Anything that gets your nuts off - come down to Brazil and try a tranny.

The material used to make the 0.1uF cap (the dielectric) is ceramic, which is different to the dielectric of the 10uF cap which is an aluminum electrolyte. This means the two capacitors have different performance at different frequencies. The 0.1uF ceramic cap is best at filtering out high frequency noise whereas the 10uF cap will be useless for that.

Write "I will use google before asking dumb questions" 100 times for me.

Generally you don't need the ceramic cap at the regulator, as each chip you're suppling has its own ceramic decoupling capacitor close to its supply pin. Yes the ceramic cap will handle events on the timescale of nanoseconds which is the speed of logic chips.

There are NO "dumb" questions!

hmmm not sure what the difference is in asking here than asking google except that asking it here makes more sense. The only dumb question is one that isn't asked or is asked despite it being answered in the article in question. The perception of "dumb" is based on level of knowledge when encountering a piece of information. A good well-thought-out tutorial will not leave these kinds of things hanging. 'Tutors' are usually (not always on youtube unfortunately) well versed in their topics and can easily forget what watchers may or may not know so can easily miss/skip bits. This is a common problem for us beginner learners in any field. Otherwise this guy's videos are great!

Lmao

Just if that woud work, the current would just go into the otehr direction :D

LM1084 and its setup for 5v using resistors. my voltage drops from 5.20v to 3.30v when i connect a 2A load on it.. anyone help me solve this ? my power supply is 12v 20A and input voltage stay at a constant 12v and iv tried 2000uf cap on the output but still voltage falls iv used 4000uf also no change...and mobile phone stops charging under 5v

Mix Bag Unless you're using an adjustable linear regulator, you can't set the output voltage using resistors. You need a 5 volt regulator with no resistors for 5 volts. If you need more power (aka more amps on the output), get a powerful buck converter.

Believe me, you're not alone

I think they use multiple regulators with a combination of relays and forced cooling..

Can you use just one regulator to control the base of several high current transistors? In a H-circuit arrangement perhaps?

Actually, there are more high-amperage regulators than most external-appliance milliamp regulators. It's call 'your car alternator', and there are hundreds of millions of them worldwide. Sadly, since not one single video was on RU-vid showing how something 12v and over 5-7 amps was regulated, I was lucky enough to get a schematic for an automotive regulator to see how they were handling the 'high amperage'. Quite simple, actually, and most do it for less than $20, case included.

For high current (hell, any current really) applications you'll want to use switching voltage regulators instead of linear ones. The chips are super cheap and the circuits aren't really much more difficult, especially fix voltage ones. Look up buck-boost converter for voltage regulation. They are meant to regulate over and under voltages.

That is actually a good question. Looking for an air compressor that runs on 12V 7-10A but need a converter that runs off the wall. so those high loads are there.

in order use google you must make a 12 volt circuit with 2 transistors and a 4 diodes and a stepping motor, then just connect it at the computer. If you don't know how to make the circuit just google it.

lol

You jab a metal fork into a power socket. No seriously don't do that. 🙄

why?

@@mohamedtaha2025 rue it waste lot of power . use dc to dc converter. see my videos

@@electronicasaneesh82 But fore audio LINEAR - best voltage regulator. DC-DC convertors produce a lot of noise.

Precisely 😉