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
freemusicarchive.org/music/Chr...

[@syedayman9322]

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

[@robprebil]

What an excellent simple idea - thanks!

[@ElectronFunCom]

Rob Prebil Thanks a lot for your comment :)

[@odddreamers2404]

thanx for this sweet explanation

[@luvnotvideos]

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

[@ElectronFunCom]

Thank you for watching and your comment! I'm glad I could help.

[@S3Moto]

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

[@MuhammadFaridulIslam]

Very simple but useful!

[@ElectronFunCom]

Thank you :)

[@minopausa]

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

[@clobel55]

AND you could understand his English

[@0himym]

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 :)

[@ElectronFunCom]

The smoke detector is a nice and simple project. Did you have some kind of enclosure to limit the ambient light?

[@0himym]

Yeah, we used empty cornflakes boxes to hide the ambient light.

[@ElectronFunCom]

That's a good example of a project, which can show beginners what you can do with electronics, nice :)

[@josebarra1464]

ls mejor explicacion que he visto...gracias

[@ElectronFunCom]

+Jose Barra I don't speak Spanish, but thanks for your comment - Google Translator does the job :)

[@deepstate8474]

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

[@MPElectronique]

Very usefull! I have subscribed! :))

[@ElectronFunCom]

Marc Paradis Thanks for watching and subscribing :) I can see your channel is interesting too, I would subscribe, but I don't know French, sorry.

[@svcreations2004]

good sir its working thank u

[@vijayKumar-gm5re]

how to use ardiuno in such type of project

[@MTHA-nk7ch]

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

[@hepsibai2842]

Can I do for bike headlamp

[@renukajoshi2815]

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

[@_a_5082]

Can we use in automobiles

[@crlaw75]

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.

[@ElectronFunCom]

It's a great idea, but it would need a couple of upgrades :)

[@RonGallardo777]

ElectronFun.com like what upgrades? plz explain

[@ledmk2]

Nice video

[@ElectronFunCom]

+DIY Car LED Lights Mods Tuning Channel - VW Golf Thanks a lot :)

[@richardhalliday159]

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.

[@younegrskagayan5801]

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

[@MrNod56]

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

[@ElectronFunCom]

To tell you the truth - I wouldn't mess around with a ceiling lamp, especially when the bulbs are built in permanently.

[@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.

[@sunitapatil381]

sir can u tel how to connect a 50 led s in serious..

[@ElectronFunCom]

Everything is well described here: www.hobby-hour.com/electronics/ledcalc.php.

[@electronicguruji9404]

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

[@teoman1068]

Same problem here. Have you found the solution?

[@electronicguruji9404]

@@teoman1068 yeah just search on the KZbin how to make a automatic street light

[@electronicguruji9404]

@@teoman1068 kzbin.info/www/bejne/oKSUqKyHfKuqbbs

[@teoman1068]

Electronic Guruji thanks!

[@ShihabdeentheCyclist]

I have keychain flashlight led bulb how to reduce brightness

[@discoHR]

Can this be done with a phototransistor?

[@ElectronFunCom]

Yet it could, but you would need to change the circuit a bit.

[@LovesGames113]

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

[@ElectronFunCom]

That's a good question and I was looking for a solution but couldn't find anything good enough. Using a microcontroller just to make such an effect is probably an overkill.

[@jonpaul9663]

ElectronFun.com Bc547 transistor circuit..

[@manirajmedishetty1809]

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

[@howardgroyer2649]

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

[@epefaniosuringajr.9992]

How to adjust the level of brightness from dim to super bright by using ldr

[@ElectronFunCom]

Was that a question or statement?

[@ShadeS12]

Colour detector without microprocessor with only ldr.and other components

[@jaganathvp1108]

How could we accompany photocell in LED lamps and street lights

[@ElectronFunCom]

It would be doable, but a bit more complicated. You could use several photocells and calculate the average light input, so the lights would not go crazy.

[@jaganathvp1108]

thank you for your knowledge sharing.

[@ElectronFunCom]

No problem :)

[@ElectronFunCom]

Cheers :)

[@shabirsaqebi2762]

how to get the opposite behaviour. i mean when we put some light on the photocell the LED gets dimmer. please reply fast cause i really need to know the answer

[@ElectronFunCom]

I'm guessing you don't want to use a microcontroller, right? For the moment, I can't recall a device, which would directly increase resistance with higher light levels. I'll try to figure out something, but can't promise anything.

[@iborschtsch]

You may take a look at this little circuit: www.evilmadscientist.com/2007/a-simple-and-cheap-dark-detecting-led-circuit/

[@SoumendraBagh]

I have an doubt. If the ultimate objective is power saving, I guess the whole circuit is still consuming the same amount of power. Simply put the power instead of being converted into photons(in Led) is now being dissipated across R(inside photocell). If I am right, can you kindly suggest any power saving solutions?

[@ElectronFunCom]

I didn't even mention power saving - it was not my objective. LEDs can blind you when it's dark, so my goal was to dimmer them when it's dark automatically.

[@natansh1115]

In smart phone's screen

[@kennmossman8701]

I THOUGHT LDRs can Not take much current - are you Not running a risk of burning out the LDR at 20 mA??????

[@Revenineakarevan]

They should install it in all cellphones, seriously i cant see damn thing when sun is shining and chaning brightness manually every time is annoying, especially since u lose battery very quickly when the brightness is set to high level.

[@ElectronFunCom]

+Revan R I know some smartphones do have light sensors and they adjust brightens automatically .

[@Bradman175]

Beginner video mmmmmm. I was expecting more complicated lol.

[@ElectronFunCom]

+Bradman175 More complicated solution or explanation? :)

[@Bradman175]

+ElectronFun.com Solution :P I was expecting the usage of a MOSFET with a voltage divider across its gate, one side with a potentiometer to change the threshold and the other with a LDR.

[@ElectronFunCom]

+Bradman175 Nice idea for another level video :)

[@ElectronFunCom]

Have you ever tried using a photocell to auto adjust LED brightness? Go here to see how: kzbin.info/www/bejne/bH66l2mcgqeJldU

[@kennmossman8701]

I checked....many LDR are limited to 100 mW, so at 12Volts it ill BURN-OUT. Even at 5 Volts it is MARGINAL. THIS IS TERRIBLE ENGINEEERING