Simple direct current regulator circuits

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[@theman83744]

Great video, I'll watch it 30 times to understand because its so densely pact with information.

[@Rtube-b1l]

I like her teaching ability. Clear and easy to understand ✅

[@gordonlawrence4749]

Zenner diodes if used for very precise control voltages should have a 100nFceramic capacitor in parallel to eliminate some of the zenner noise. Zenner noise is worse at low current and a zenner should never be used at less than 10% of it's rated working current (this would cause voltage tolerance issues too). Also R1 in the transistor only current regulator should be selected to have approximately 5% of the current flow of that required by the whole circuit - this is because the hfe of a medium power transistor is rarely over 50 (sometimes as low as 20) for medium currents (a bit more at low current) and by medium current I mean medium with reference to that particular transistor. EG a medium current for a 5A part would be 500mA. Low current would be 50mA and high current would be 1A+.

[@PhG1961]

Interesting and usefull reply ! Thnxs !

[@caeiranir-dk4rw]

hi, in last circuit how to calculate R1?

[@kennmossman8701]

ZeNer not Zenn-er Zeners are not for precise voltage references. The noise by the Zener is usually trivial except in high-gain audio circuits or such.

[@grahamhall2662]

They are using an TIP 142 which is a darlington with hfe of 1000. Makes a nonsense of your theory.

[@PhG1961]

Interesting video that refreshed some of my forgotten knowledge...

[@bingosunnoon9341]

Very good up to date design, direction and narration. Thanks.

[@ajayakhoshnk7728]

This circuit is working, thanks to the developer 💯👍💐

[@CliveChamberlain946]

Oops! On 3 transistors you say, resistors are added to the emitter circuit, but show 0.22ohm resistors on the collectors..

[@browaruspierogus2182]

Yeah those boards are good for driver circuits but if you deal with currents 20A+ those PCBs are fried (thin copper tracks). Whole art is laying out those power elements.

[@brianbenson5769]

Thank you for refreshing my theory. Best wishes, BRIAN.

[@tanishqbhaiji103]

Why to use a shunt, I use a transistor with Low gain and feed the base a constant current using a resistor like 10ma and get 100 gain so 1A out.

[@user001sg9]

Your videos are educative. Thanks. You mention JLPCB in your videos but the PCBs you have shown in the videos don't look like professional ones from JLPCB. Why is this?

[@UpcycleElectronics]

Ha! I just realized I can use the unused half of the LM358 op amp on a cheap VC288 Volt/Current meter to create an adjustable current limit.

[@mrimbusyt]

Awesome video i Like it 👌♥️👍👌😀👌♥️

[@amirabdurraman6286]

The circuit is very good, but it would be better with a current limit indicator ... Maybe a led indicator

[@andreaskouzapas4894]

Hi, I have a question about the first circuit with two transistors and resistors. If the source voltage drops down the load current will be constant or not?

[@FreiR]

Ty for the tip, I will enjoy it in my project ;)

[@desimedia6521]

hi. very good and detailed information. thanks. can you explain a lm358 ampare control circuit for buck or boost converter?

[@mohitsorout6669]

Amazing explanation as always, and effective deasine

[@IsmailDadang]

Mantap gan.

[@blingsingh6857]

Thanks for high quality circuit.

[@MCsCreations]

Really nice! 😊

[@eivis13]

So in essence if you're running up to 1A it's better to use a resistor as a current limiter rather than a current limiting circuit? If not what am i reading backwards?

[@Enoch-Gnosis]

How low can you set the current? Can it be set to 15ma?

[@youvebeensubbedto8009]

I'd recommend checking out the datasheet for these devices. They usually provide a current range chart for operation.

[@MegaInformazione]

filament bulb in 2018?

[@pioneer1943]

Is it possible to use a potentiometer on lm317 circuit? It would make a good current regulator for a variable bench power supply.

[@kennmossman8701]

Bot in the circuits shown. The current is too high. There are other circuits............

[@anonrider8870]

What transistors should i use if i want the voltage be up to 50V

[@oskarsabo]

Look after transistor datasheets. I think 2sc5200 transistor can handle 50 volts

[@rahulkoley6161]

Can i use 2 pieces 3205 mosfet... from lm358 output pin parallalaly to increase load current upto 6amp...??

[@m.palanisamy5212]

Sister u have make an usb killer previously can u sam me the small little transformer calculations 😊😄

[@bradmcclure4945]

I'm hoping to find a way to regulate my 36v lipo to a discharge rate not to exceed 30amps

[@kpomalproductions5254]

Pls can you make a sine wave inverter

[@Varaprasannakumaryeggati]

Ji if you got it can you say me

[@jankalode]

could you please explain how LM358 schematic works? It is not functioning as in video, inputs 2 and 3 have different voltage and it is not changing by potentiometer. And mosfet is open. Always.

[@hichamtassi1753]

Hello, very nice video ! i did the same, i used 1.5 Ohm to have an output of max 1A, but when i plug a load to my 12v lamp bulb, the voltage drops to 4v, is it normal ? many thanks.

[@nhuthoanghuynh7833]

that is due to your set current limit

[@ShahZahid]

Why do your pcbs resemble like the ones in 1980s

[@suryapatnaik5720]

Can we add this to lm317 variable voltage supply as variable current setup?

[@Shebeeb55]

Please post variable frequency controller for power motors

[@niky7197]

Very value

[@erdum]

How calculate rx value

[@mohammedjawadforelectronic9190]

Rx=1.2/I

[@avgear2694]

I use lm358, when i set pot to zero why i still get 1amp? And why not getting 0amp? Can u help me?

[@b.g.bvoice1142]

I love you guys

[@gabrielquarshie94]

VERY very useful

[@balanbogdan9160]

Thank you!

[@allexandruprroca6713]

CAN YOU CREATE ONE HIGH SIDE WITH N CHANNEL ?

[@Noel_jr76]

Thanks 👍

[@hayel2015]

Big like 👍 👍 👍

[@misirali7173]

lm317 dosent work with transistor.

[@alyo3299]

pls can you make an video modyfijing that kit from chine at 0:34

[@normalthinkponnala5519]

good explained

[@carlospoint8147]

Thank's.

[@necoisidois7570]

Thank you..

[@fnzip]

Very nice

[@LalaniKumari-px8fl]

❤❤❤❤❤❤

[@caeiranir-dk4rw]

hi, in last circuit how to calculate R1?

[@kennmossman8701]

R1 ???

[@arielgonzales7264]

don't work number one in proteus hmm...

[@thghho]

Hello, Can you guide me for limiting the output current to 350mA of a power supply (with output 250vdc, max output 15Amp). Should I simply add 0.22 Ohm 10W (9 Resisters) in Parallel before load?

[@hasemali7799]

this is not understandable

[@sayonicad8931]

hi

[@muhammadsalimramadhan8916]

can i replace power transistor with mosfets

[@delectrical4030]

what if the input voltage is 220Vdc and the current that i need is 1amp can you help me. for the components needed to change thankyou!

[@shoaibsiddiqui9188]

my linear dc power supply 30v 5amp not increasing current above 2 amp and if i rotate full it shows 2 to 3 amp and when i connect load resistor to check current it slowly increase current upto 3amp and above but at that time my power supply 2n3055 get short what will be the problem?

[@ghanrajsingh6966]

alwayas good

[@ferinarakkal1442]

I am making 24v 10ams smps my output is 410mA I want to increase current at 10 amps how I get 10amps in output without Changing voltage

[@m.palanisamy5212]

Reply me

[@electromagic3111]

like

[@manuelr7121]

very intresting