MAKE presents: The LED

[Pintoleite3]

NERD

[Fluvance]

Wait…their presenting LEDs now???? But…they were invented like 50 years ago… And became mass produced a decade ago… A bit late to the party much?

[DarkyRatchet]

Nice nose

[RiaRadioFMHD773]

In August 1989, Cree Inc. introduced the first commercially available blue LED. After that you could produce true white LEDs, since the primary colours of light are red, blue and green. Later it was noticed that a tri-colour LED produced too much of a rainbow effect and it was then that the dual blue/ yellow LED making a white. Yellow light being a mix of red and green.

[jamsplash]

Quality LED bulbs UK only : lightevolution.co.uk

[jamsplash]

Quality LED bulbs UK only : lightevolution.co.uk

[CognitiveNetwork]

What type of metal is used for these diodes, and a typical TO-18 photodiode? What would its metal frame and metal "sticks" be made of? Anode/cathode are shown yellow and the frame has the gray metallic collor. (TO-18)

[CognitiveNetwork]

This video is great, but why do you have to look like a geek? I feel a little bit embaraced, sitting here in my university. They won't take me serriously. But this is my engineering degree we're talking about here.

[frac]

@CognitiveNetwork Don`t worry. With spelling like that, they`re probably not taking you seriously anyway.

[dystym]

В 20 е годы в каждой деревне мастерили полупроводниковый диод из серы и свинца заливая расплав в наперстки при создании детекторного приемника , вот тогда изобрели полупроводник , во всяком случае диод

[tradecycles]

Wow this was really informative. Tell us about new LED's that keep changing colors, like one on my cellphone. Guy looks very intelligent

[pkmmama]

How many colors and types of LEDs are there?

[jgrecoarroyo]

This guys are awesome: can make a video from a simple LED and make it interesting! :)

[Irishfreedom]

What I got from this: "Instead of buying presents this xmas, make presents! LED messages make for great gifts this Christmas"

[salman4614]

Thumbs up if u think he looks like Hugo Weaving ('Agent Smith' in 'Matrix') ! ! !

[stefantomic1389]

@salman4614 I'm going to enjoy watching you die, Mr. Anderson.

[Mentorcase]

@salman4614 No he looks like Graham Garden from the goodies.

[toro199999]

@salman4614 i think he does :)

[mszegedy]

If I somehow get sent back to ancient Rome, I want to know how no make an LED (you know, after I've introduced everybody to the decimal system, higher mathematics, chemistry, biology, and modern medicine).

[hitsassasian]

this is what we call a NERD...!!

[fairyheli2]

@hitsassasian an ultra nerd, anyone who takes them self seriously whilst wearing magnifying goggles is a n utra-nerd

[electronicslover1993]

I hope you send these videos to our e-mail

[guinguinnaman]

this subject matter is my favorite and also my blind side

[guinguinnaman]

this sucject matter is my favorite and my blind side ! Great job !

[DynamicSun]

really cool made movie. go on with that art

[MiguelRelvas1]

I LOVE LIGHTS! Especially LED lights, they fascinate me!

[madamerotten]

The name of the substance is "silicon carbide," not "silicone carbide."

[Ninja8996]

hahahahaha this guys looks so funny !!!!! :D



[dametalbasser]

lol... I thought the title stood for making presents with leds...

[neveragaineverever]

Not this guy again.

[Darkreaperxl]

Hey its Austin powers... Oh wait

[Jhfgsjdcd]

What the hell weres the resistor and transistor

[SuperAaaaa123456]

booring

[theonelinerkid]

how low will those carborundum leds work down to? could you suce them in a joulethief or something like that?

[madamerotten]

@theonelinerkid The lowest forward voltage diodes are probably silicon Schottky types.

[blickblocks]

You didn't explain semiconductors.

[FlackVendetta]

HAHAHA I HAVE THE SAME GUITAR AMPLIFIER FROM 1:06 !!! lool

[mamiC23]

ouw yea

[oceantrolls73]

brilliant. you experiment of the crystal was just out of this world. What better way of imparting knowledge? Thank you.

[kristiansavka]

But,how can I get a material?

[ljdougie]

where was this guy when i had my science test :)



[kmcmohit]

hey sir u hav a nic way of makin physics use in daily lyf send me sum more video of urs related 2 different concept of physics n dere uses my email id kmcmohit@yahoo.com

[gunmanzzreview]

get a life you stupid virgin



[thre11]

ok please help me out im trying to light up 12 green leds 2.5 volts max there for a helmet so i need a portable power sorce

[archie977]

adds=lies lets bad adds

[Moongazerr]

which NBA player are you?

[troncheg]

subtitles!!! please

[Carlodimaximus]

Nice vid. Very professional.

[PlancksTime]

I thought it meant make presents (make gifts): the LED. I was like, who would give a LED as a gift?

[MrLEDLamp]

@PlancksTime

i can give it to you as a gift.

[ChrisThompsons40K]

@PlancksTime divvy

[crazysarcasm211]

In soviet russia LED's make presents

[partyboydude]

I agree with him under me

Great video been looking for a video of led info

[FrenzyandLazerbeak]

fuckin Awsome...I need more information on Led light and how to make them work..

[SereLLiK]

How'd i get here from Barking Cat?

[SereLLiK]

How's i get her from Barking Cat?

[bojangles465]

how u wire the "make" light in background?

[blankrofl]

wow, i have a huge chunk of silicone carbide, and i didnt even know it could do that ;o

[murt986]

kipkay is better than him!!!

[ericrulesism]

@murt986 he is kipkay

[ericrulesism]

@murt986 he is kipkay nvm

[MrSuckmyballs32]

its great to see that there are still people in youtube dedicated to making good educational videos.

cheers man you've earned my subscription

[bleemy]

how would i find the current (i) in a led? i brought a few LEDs off ebay and want to connect them to a certain battery... but obviously i need to add a resister to the mix... i can get the V from the battery, but would need to know the the (I) from the LED wouldnt i? also second question is ... if i have two LEDs in serial or parrallel ... what do i do to the formula ? would i half the resistance if i doubled the LED of same current

ps your explainations in circuitry is AWSOME. ty =) Lee

[Techno246]

@bleemy If you're talking about the maximum/recommended operating current of the LED, that will depend on the manufacturer's specifications. The average current that most LEDs should run on is 20mA.

For calculations, you can assume a constant voltage drop of around 1.7V (for a standard red LED). But this will vary for different LEDs. (post too long continued)

[Techno246]

@bleemy To find the resistance required, you can subtract this from your battery voltage then calculate the resistance required to give the desired current using ohms law. i.e. resistance = (BatteryVoltage - LEDVoltageDrop)/Current. For example, if your battery is 9V, the voltage drop of the LED is 1.7V, and your desired current is 20mA, it will be R=(9-1.7)/0.02 = 365ohms.

[9291565290]

wow!!! cool video i liked it

[HDv1de0]

From the Title It seemed like Make: invented the LED.

[matthewtchernev123]

you added subtitles

[maincourseistoocool]

boring as shit

[imanoob4]

Each Led requires about 3 Volts.

[morelokaslolo]

vc é foda ( brazill)

[29riteshkakkar]

This is awesome

check my channel.........

[MORONIOO76]

dude I have been watching vids on leds and reading all kinds of stuff about them and this was one of the most Professional videos I have seen and very interesting great job! I am off to see your other videos now lol

[comingfromthesouth]

Great!

[ivockercg]

exelent !

[JonDeth]

I have an LED strip that must draw an amp or more to reach full efficiency.

Unfortunately, my power supply under the circumstances is limited to about 500mA.

Will using a large value cap allow it to reach full luminosity?

[iceman977th]

@JonDeth It will, but it won't stay that way. It's like filling a water tank that has 100 gallons of capacity, using a 50 gallon/minute pump to fill it up, but using a 100 gallon/minute pump to extract water.

[JonDeth]

@iceman977th I'm using some rather large capacitors lol

[rigby608]

hey, your not kipkay

[joshabrown86]

Get your knees a flexin and your arms T-rexin...

[GostosoSPbr]

Due your nails freak

[alienware112]

Is this dwight schrute off of the office?

[zXeFFeCTzXz]

sexy beast;)

[okultov]

i have that amp :)

[GalaticTG]

why are you wearing a suit

[TheYellowFlashLight]

I like this explanation.

[weider555]

Типичный ботан :)

[AHProduction1214]

ery good job.Come and join us.

plz subscribe ahproduction1214

[Hallaran]

Thanks for the education! Thumbs up!

[MrKarnawal]

Какой дядька потешный. Типичный учёный☺

[walterwnicolas1959]

hola esta muy  bueno ,pero el detalle es que estaría bueno que también estuviese echo en español gracias .

[justgivemethetruth]

wow, very cool!

[20swaraj]

He look like Hugo Weaver(Agent Smith) and he got a black suit 

[TheCodingProductions]

Could the probes be replaced with a photo resistor?

[lilpsyco10]

dude get a girlfriend hehehe

[linagee]

Why do world changing inventions usually get attributed to the wrong guy? Hah.

[bluckbaster]

i did lot of practicals during my childhood(frm 7yrs to 13yrs)considering LED!

LED is awesome & totally fabulous!

[16mmDJ]

Collin Cunningham is awesome

[0568067675]

he look like smith in the film "the matrix" ha ha XD

[donthecat]

Nice simple video.. I'd like to use this at an Enironmental campaign we are doing in the 1st week of March....

any ways I can get a copy in a better Res ? Thanks

[MiniGeek31337]

LOL good intro ;)

[speedomike747]

@GregTheCreator omfg, your like the 9999th person who answered my question -.-

[shebotnov]

thx its informative

[NeilAnthony69]

Great video, very interesting and educational...keep up the good work!

[JayOhEnEnWhyEx]

In Imperial Russia we don't make stupid jokes like they do in Soviet Russia.

[PyroManiac72386]

great man. u explained resistor to me in a simple yet great way. just what i needed.

[dmitry246]

go weed

[TooHuman]

Hahahaha, i tought this vid was about how to make a present with leds XD

[shanered5]

Well, you didn't say why it lights up or why its different that a regular bulb .... which I figured you would being that the whole video is about the LED

[Ormaaj]

Keep making these... This is one of my favorite series!

[hatelibs1]

why the bum bum music, why not just teach and leave the CRAP music that everyone does???? and do you great stuff??

[speedomike747]

lol, already got about 9999 replys xD

[naxoman77]

OMG ANGUS YOUNG'S NERD BROTHER! D:

[kutstudios]

AGHH THE LED MY BROTHER IS WATCHING PORN ANYDAY ON HIS LED MONITOR THE LED ISNT IT INCREDIBLE?

[akke9798]

how do i run like 10 leds from like one battery?

im a noob with leds so im just wondering

[Dark0Lord7]

@akke9798 Depends on the color. You make series in parallel.

[Elliottslingsby]

You should cover LED and Motor PWM.

[LucaTurilli89]

Why 2 volts are enough for the electrons to pass through the distance of 0.5-1.0 mm when you need 3 kilovolts current for a 1 mm square to pass through ?!

[covermanproductions]

@LucaTurilli89 if you look closely its not a gap... the anode has a kind of bowl holding the light emmiting material, while the cathode has a tiny hair thin wire touching the top of the material

[rottenjonny2055]

@TechBoywii

Actually it is die.

[marko94serbia]

2:29 dude u need to cut ur nails.

[funfunnystuff]

you have longnails

[SwisssBolla]

Nice video, well done.

[hidde50]

omfg i look like creepy sciense dude frm a old movie xD old school LOL

[BlakeMason2]

Awesome history! Thanks! I was upset in the last Harrison Ford Indiana Jones movie because they had an LED clock in the war room--way too early for LED's. Had they put a NIXIE clock, then they would have been true to the era. No LED's were in WWII. My search led to the 60's as well, but I missed the early years with RF detectors--COOL!

[MRJIMMYDEAN09]

fuck leds

[tatarhead]

Great info. This has really sparked my interest in LEDs.

Thanks for sharing.

[KITTKITT20]

i want to know more about ciret boards

[schvabek]

Yes, you're the only one who's neck-to-neck with Kipkay, as far as the video entertainment goes... Love watching your videos :)

[docent538]

flashled.info

[thomasw011]

what is the power supply? i would like to be able to try making this, but i do not know the specifics of it.

[speedomike747]

how do multi colour leds work then?

[tompsukka2008]

@speedomike747 they have different kind of semi conductive material inside

[BlakeMason2]

@speedomike747 Multicolored LEDS have multiple dies which make the different colors when energized. GE introduced a multi-die unit incorporating a microprocessor to create strings of lights which can make all kinds of colors based on data on a communication line connecting all the lights together. Dies can be operated together, like red and blue to make green. Bi-color leds (like red and green) have a common lead and 2 leads, one for each color. Others detect the polarity to change color.

[TechBoywii]

@BlakeMason2 dye, not die. but nice explanation

[LucaTurilli89]

@speedomike747 they work in the principle of a gas that is changing it's colour in different voltage as far as I know :))))).

[web1bastler]

@speedomike747 which type do you mean?

the automatic-color changing one with two pins?

or the R(ed) G(reen) B(lue) one with four pins.

[Barkeniusz]

@speedomike747 3 separate anodes made from different materials (to get different colours - RGB which stands for Red Green Blue) in one lens with collective cathode. To get demanded colour you have to connect proper (in reference to RGB color model) anode/s/ to positive.

[WilltechOnline]

@speedomike747 They generally have two (or more) individual LED's of different colours packaged together. In the case of the two colour they are connected internally with the polarity of one reversed compared to the other, so the polarity of the supply determines which one lights up.

[aznbabe70]

@speedomike747 they put multipul types of silica in them and they ligh by changeing

[97273998]

@speedomike747 they have more than one thing inside of them

[drag05h]

@speedomike747 You actually have 3 leds under the same resin housing. You'll see the multi-colored leds have 3 cathodes (red green blue) and one anode. This basically gives you a typical RGB pixel capable of having any color.

[willrandship]

@speedomike747 Multiple LEDs in one casing.

[dragonettirockstop]

@speedomike747 Multiple LEDs in one, but reversed direction. So the positive is the other one's negative. One way will light up the first color. Other way will light up the second.

[speedomike747]

@dragonettirockstop you might be the 140th person that told me :P

i lost count at 50 :D

[dragonettirockstop]

@speedomike747 Sorry. I didn't see the answers before I posted.

[speedomike747]

@dragonettirockstop dont mind :P

[CommunistRemix]

@speedomike747 different frequencies of leds and wave lengths (band gaps)

[luigi90900]

@speedomike747 I think they work by passing current through different crystals witch emit different colors of light.

[rapidistucfl]

@speedomike747 you color the glass

[Metra90]

@speedomike747 Each individual "RGB LED" light has three separate LED chips embedded (red, green, and blue), each with a pair of leads (some just use four leads, with common ground), all behind a diffuser.

By running independent PWM to each chip, you can mix different intensities of red, green, and blue to get any color.

[jrigvd]

@speedomike747 that's a LED with 3 crystals (red, green and a blue one). That's why there are 4 pins on that LED.

[HostileHST]

@speedomike747 Usually a different voltage applied will give you the different colors. Example, though not accurate, 2.4v might be blue, 3.2v may be for green and then 3.7 red. It really depends on the led used.

[xInfected27x]

@speedomike747 Just A Wild Guess, I Think It Comes From The Frequency Of The Electrical Waves In The Same Way Light Reflects Color

[Vonditto]

@speedomike747

Well they have three seperate neg or positive leads to control each colour and one for the common ground or positive all depending on the LED in question, rgb (red green blue) to get other colours you simpy mix the amount of rgb needed to make the needed colour.

in short the RGB or multi-colour led have 4 pins one common - or + and three leads for each colour.

[thekiller0673]

@speedomike747 it is tree led's and the share the ground and the dome is a mixer and blend the color

[portd2]

@speedomike747

in multi colour leds are 2 or 3 LED's with diffrent colours in a single chip.

[bigbobgotu]

@speedomike747 different color plasic around it

[ConnorXV]

@bigbobgotu nah it's multiple different (but single) coloured leds squashed into a clear housing.

[CheezWhiz127]

@speedomike747 A multicolor LED is constructed of multiple crystals in one package, sharing terminals.



[radaryky]

@speedomike747 do you know what means RGB? : R=red G=green B=blue . if the lLED red is on and is very bright and the blue LED is on but is not so bright yuo will see purple ...don't think?

[hacksign23]

@speedomike747 it's pretty much two diodes in one. the whole thing isn't a light, it's just a holder. the light itself is very small.

[omni1990]

hey could you please let me know where i can fin a LED and resistor kit like a package deal i been looking online and am able to faind very few seperately but nothing together and not many sources of either could you please help me out by emailing me at erty1990@yahoo.com

[capman911]

@omni1990 hackedgadgets"DOT"com/2009/11/­28/flashing-rgb-led-project/

[pepsiemoo]

yyou suck

[pepsiemoo]

what the heck

[TheGdragon123]

eat some light

[mittensthesnipercat]

for a nine volt baterry to led you only need a 330 resistor.

awesome vid, i learned a LOT