Constant Current Sources (Interactive!) - Simply Electronics Basics 9

[kushh]

what was left on my mind towards the end of this video is, what is considered a constant current source. Or in other words, how to i get/make a constant current source... i understand what constant current sources are capable of doing and how they are useful. but the one thing this video was missing was an example of what a constant current source can be.. like when you talked about dc power.. you mentioned a battery.. which then if i decided to try out a dc power circuit experiment, i know exactly what components i would need..
but with this video i dont know what component i need to make a constant current source.
but still a great video dont get me wrong

[HazeAnderson]

Wow, I have seen a lot of vids on constant current sources and this is the first one that I actually understood. My disconnect was thinking the voltage stayed the same. I think a LOT of trained EE overlook these otherwise "should be obvious" clues that help us newbies stay on track. Cheers!

[garokejelian]

it took me the whole day to understand it, but with ur explaine made everything easy :)

[theaussiemanhole]

What you are doing just keeps getting better.

[RXGSLSEowner]

Cool video. However, what forms does a constant current source come in? I can only think of a variable power supply that allows you to vary the supplied voltage or current. Seems like a laboratory thing. I'm guessing that you'd use some current limiter in a circuit, supply it with slightly more than it needs, then you get your constant current source, much like an LDO?

[florabee]

Should the LEDs be in series rather than parallel when one intends the same current in each of the LEDs due to different colored LEDs having different voltage drops for a given current?

[Goingreenage]

at 3:42, is it correct that the power being supplied to the circuit is 240 W? (assuming ideal conductors/resistors/etc.)

[AlexandreKandalintsev]

Only matched diodes can be connected in parallel. Otherwise they won't share current equally. No way diodes of different color can be connected this way. The diode with lowest forward voltage will take all the current.

[nieuwegeljo]

So far I very much enjoy your video's because of the simulations you show and the clear explanations! I have been taught the very basics many years ago. Thanks very much!!

[edisonfajardo]

what software your are using sir in demo?

[onothodox]

What happens when one of the leds break? Since its set at 80mA, would it destroy the others by giving it more current than the amount it needs?

[anslemmacalintal-omvc]

What are the names of application I can use to perform this practical cos I really understood you and would love to give this a try to confirm my understanding

[Goingreenage]

So the constant current power source also provides the voltage right? No need to add a battery? I'm guessing because it is a power source (P=IV) and that the I component is fixed?

[jaidmulla]

Thankyou so much sir
I easily understand the constant of current and voltage..😊

[merseytrainz]

Another Great instructional Video. Thank you

[vyns]

Can I ask why this video shows the current flowing from + to -, yet previous videos showed if flowing from - to +.

[mentis]

Hi How do i test if a constant current source is working and not the LED without having purchase another LED to test it.

[LtMewS]

Liked this video.. Question - which one is better -
1.using resistance to limit the voltage to light Led ..so specific current is passed.
2. Using constant current to allow specific current in the led...

And tell in which cases I should use these two..

[fklotaloi]

Very very informative ..I did not understand ths CC terminology, I read online, bt now I m clear coz of th exp tht explained.
Thanks a lot uploader. :-D

[RaviKumar-xxgi]

Hi I have made the circuit of LM317 on bread board. I am generating a constant current of 100mA. The input to the regulator is 3.3vdc. 100mA constant current is fed to a resistor of 100 ohms. I should measure a voltage across resistor of =10mA x 100= 1000mV=> 1V, but the voltage across the resistor I am measuring is 3.3vdc. why so? I want to use the constant current source to find the unknown resistor using current and voltage How can I do this?