How to auto adjust LED brightness

In this short video I'm demonstrating how to adjust LED brightness automatically so it won't blind you in the dark and you will be able to see if it's on or off in direct sunlight. I'm not using any microcontroller, just a simple photocell.

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Video, edit, voice by Chris Lorkowski

Music by Chris Zabriskie - CGI Snake

[luvnotvideos]

This is exactly what I need to regulate the brightness of my car's dashboard monitor. Thank you for sharing!

[SMoto]

Excellent! Perfect for my DIY LED warning lights I added to my motorcycle! Thank you!

[minopausa]

Short, simple, complete and no sh*tty music. I am shocked!!! Congrats!

[syedayman]

Amazing project, I never thought of this, I am really proud of the videos you are making

[himym]

A few years ago when I was still in school we've built a smoke detector in class using a photo cell: I don't remember the circuit in detail, but a LED pointed to the photo cell. Once there was enough smoke in it the LED light was being blocked and the resistance dropped. This triggered a buzzer. Was fun :)

[robprebil]

What an excellent simple idea - thanks!

[Levy_Wilson]

Now I just need a tutorial on how I can hack this into my PC case so the power LED doesn't become a flashlight at night.

[MTHA-nkch]

Thank you for this video but what is the code for use

[electronicguruji]

Can you reverse this function means like if there is a darkness then the brightness of led will increase

[younegrskagayan]

please tell me how to make a bulb who have a very strong light and also have a very different colors in this single bulb

[richardhalliday]

Some Black and white TVs had a similar circuit to automatically adjust the contrast, this was late 50s early 1960s to compensate for ambient light conditions, a bit of a gimmick but just goes to show the forward thinking designers at the time.

[deepstate]

Greetings, how could a photo cell be used to oscillate the intensity of the light?

[crlaw]

It would be nice to have this in car LED bulbs, especially brake light applications, where the incandescent bulb is replaced with an LED bulb.

[howardgroyer]

how would you do this but invert it - if its dark led is full bright - if its light the led goes dim

[manirajmedishetty]

I want brighter in the dark and dimmer in the sunlight. Can we do that??

[josebarra]

ls mejor explicacion que he visto...gracias

[LovesGames]

how do the opposite where the photocell turns on the light from the darkness

[renukajoshi]

can you please provide us arduino uno code for on/off leds with brightness control for multiple leds.

[MrNod]

Would you give me any idea how to make my led ceiling lamp brighter. It does not have changeable bulbs.

[vijayKumar-gmre]

how to use ardiuno in such type of project