Hey i want to ask you for little help Im fixing PCB aluminium board with 6x3w leds powered by 12 volt. I found out that pcb is broken so i removed leds from there. Now i want to put them back together and i need some power supply to reduce 12volt to 3.7 i think and also limit output current?
U can use a resistance to drop the voltage by choosing an appropriate values for the resistance and it's wattage (important ), and if you want to use a power supply which converts 12 v into 3.7 volts, then make sure that your power supply is capable of giving 18watts of power. (At least).
Search on ebay for Epistar LED chips, beads, cob, etc. They have the type in the video in 1watt and 3watt i believe in multiple colors. Hope that helps.
you ALWAYS need to power (any) led’s with the right CURRENT, the voltage comes next. This means that you might consider connecting some adding up their own voltage (4x3,3=13,2 Volts which will work perfectly on 12 Volt power supply. Or connect 3 leds to a 9 Volt powersupply (battery). Any use or resistors makes current go lost, and warm the resistors up unnecessarily.
as soon as you calculate the number of leds as close as power voltage you want to use a low resistor value, so using four leds on an old car battery may just need a 5 or 10 Ohm resistor (1/2 watt). So 4 leds will need about 13 Volt, which is near enough to battey voltage, just use that 5 ohm resistor anyway 😉
First Music Volume OK as I Hit mute. For a Quick Test of LED used & 330R 1/4 watt resister used OK. But for prolonged life of RESISTER & LED NOT OK. The LED used requires a heat radiator for prolonged use. The resister needs a higher wattage say 1/2 watt - But as You Have only 1/4 watt this is what I would do first get 4 x 330R, join 2 in series, and DO the same with the other 2 resisters making 2 series pairs. ( This will ad the 2 330R together making 660R ) Now join the 2 series pairs in Parallel and that will divide the total resistance back to 330R. Instead of a lone 1/4 watt = 250 mWatt LOAD BEARING MAX resister, you now have at least a 500 mWatt 330R resister. ( yes I here you say it ads to 1watt. I always divide resistance load capacity as a rule of thumb when applying this use to resisters ) Now Ohm's Law - Assumption, and I round up (>) Battery max Volts 13.8v ( 13.8v - LED 3v = 10.8v ) ( 10.8v / 330R = .033 Amp ) ( 10.8v / .033 Amp = (>) 327R ) ( 10.8v * .033 Amp = (>) 365 mWatt ) there for a lone 330R 1/4 watt RESISTER AND NO LED HEAT RADIATOR not good for prolonged use.
@@funaro13 - 3.6v 700ma em uma fonte 5v qual resistor = (+5V - Resister -Anode LED Kathode-Gnd) ( 5 - 3.6 = 1V4 ) V / I =R ( 1V4 / 700mA = 2R Ohm ( P = Watts ) V * I = P ( 1V4 * .700 = 0.98Watts = 980mW ) need 2ohm 2Watt Resister. ( P / I = V ) ( .98 / .7 = 1V4 ) ( P / V = I ) ( .98 / 1V4 = 0.7 ) Use LED @ 350mA for longer Life. ( 1V4 / 350mA = 2.857 = 3 Ohm ) ( V * I = P ) ( 1V4 * .35 = .49Watt ) = 3 Ohm @ 1Watt. Recommended. Provided the 5V PSU is Stablised 5V.
Is the resistor needed to run the LED cob chip on a 12v automotive electrical system? Is the LED 3v or 12v? Also, will i need 1 resistor PER led if i plan on using multiple LED chips on a board, etc?
3v ki butten LED ko 4v 7 am ki battery se jlane par konsa resistance lgaye kkuki LED kharab ho rhi h jlane par
Hallo sir muje 12v ki battery me 3 led lagani hai konsa resistor lagana padega????
No need heat sink?
هل سوف تسخن المقاومة ؟ ، هل ستحترق ؟
Is it suit for flashlight purpose?
Yes
@@masar-at thank you sir
@@09kenxgamer31 you are most welcome
Bhai ye light bahut heat hokar fuse hojati hai toh kya kare
Sir i tired this 3v led with 5v charger using 2 IN4007 diode but led getting hot from below.... Please help me😢😢
I recommended you to glow 3 Wat led with 5 volt
Use a small finned heat sink or aluminum plate on the back
Y para 5 voltios que resistencia usar?
Do you think I could buy a 3volt Red flashing one,
Yes, they have them on Amazon
What is the name of that bulbs
i am trying to use 10 chips as direct do i need resisters to run ,,if yes what is the ohms i need .. your advise please thanks
هذه المصابيح اللد قويه جدا لاتوجد عندنا منها في العراق عندنا اللد العادي 💙💚💜
موجودة بمحلات الدراجات النارية الماطورسكل موجودة ببروجكتر الدراجة النارية
موجودة ب باب الشرجي القطعة الوحدة ٥٠٠ دينار من محل لؤي بسوك الالكترونيات هذا الليد اوروبي وراقي جداً .
How much current is it drawing ?
how many lumens if you connect it directly to 120Vac?
Boom
What is resister hom
I have 12 volt lead battery but i just want to know how many 1 watt led can i use and what resistor should i use for it
100 ohm resister , also use heatsink
amigo os Led 3w só pode ser utilizado em dissipador de calor eles esquental muito
Hey i want to ask you for little help
Im fixing PCB aluminium board with 6x3w leds powered by 12 volt.
I found out that pcb is broken so i removed leds from there.
Now i want to put them back together and i need some power supply to reduce 12volt to 3.7 i think and also limit output current?
U can use a resistance to drop the voltage by choosing an appropriate values for the resistance and it's wattage (important ), and if you want to use a power supply which converts 12 v into 3.7 volts, then make sure that your power supply is capable of giving 18watts of power. (At least).
22 omhs rjistens use
I need t connect 5, 3w led beads in series so what ohm rating should be used? And one resistor per led?
hari prasad what power source are you using?
Hi you need use a constant current power supply for those types of leds
Do we need radiator for led
Yes
yes
Yes.. No..
Yes.. No..
Yes no..
Heat sink
Sir Resistor Voltage ?
Sir can I know what kind of diode that you use?
Search on ebay for Epistar LED chips, beads, cob, etc. They have the type in the video in 1watt and 3watt i believe in multiple colors. Hope that helps.
Avrodh kon sa liya
Avoid using such a loud music....
Sir. 6v 4.5 amp batory me konsa resistance lagana padega.
36 ohm
can I just make a Searies or 1w Led to make 12v and directly light up on a 12V car battery instead of using diode to convert the voltage?
you ALWAYS need to power (any) led’s with the right CURRENT, the voltage comes next. This means that you might consider connecting some adding up their own voltage (4x3,3=13,2 Volts which will work perfectly on 12 Volt power supply. Or connect 3 leds to a 9 Volt powersupply (battery). Any use or resistors makes current go lost, and warm the resistors up unnecessarily.
@@jackraves7363 what kind of resistor to be specific? power supply i do have old car battery.. sorry im not a technician.. just want to do DIY Lights
as soon as you calculate the number of leds as close as power voltage you want to use a low resistor value, so using four leds on an old car battery may just need a 5 or 10 Ohm resistor (1/2 watt). So 4 leds will need about 13 Volt, which is near enough to battey voltage, just use that 5 ohm resistor anyway 😉
@@jackraves7363 thank you very much. Your a big help. 😇😇😇
Bhai yahi Led m 3.7 volt battery se jala Raha hu to bhi het ho rahi hai kon sa resistance lagau
Mera v same problem.
330 Ohm ki. Dikha to raha hy video m
R 330 ohm ??
First Music Volume OK as I Hit mute. For a Quick Test of LED used & 330R 1/4 watt resister used OK. But for prolonged life of RESISTER & LED NOT OK. The LED used requires a heat radiator for prolonged use. The resister needs a higher wattage say 1/2 watt - But as You Have only 1/4 watt this is what I would do first get 4 x 330R, join 2 in series, and DO the same with the other 2 resisters making 2 series pairs. ( This will ad the 2 330R together making 660R ) Now join the 2 series pairs in Parallel and that will divide the total resistance back to 330R. Instead of a lone 1/4 watt = 250 mWatt LOAD BEARING MAX resister, you now have at least a 500 mWatt 330R resister. ( yes I here you say it ads to 1watt. I always divide resistance load capacity as a rule of thumb when applying this use to resisters ) Now Ohm's Law - Assumption, and I round up (>) Battery max Volts 13.8v ( 13.8v - LED 3v = 10.8v ) ( 10.8v / 330R = .033 Amp ) ( 10.8v / .033 Amp = (>) 327R ) ( 10.8v * .033 Amp = (>) 365 mWatt ) there for a lone 330R 1/4 watt RESISTER AND NO LED HEAT RADIATOR not good for prolonged use.
Use of heat sink will make your led long life.
amigo seu ligar um led 3w 3.6v 700ma em uma fonte 5v qual resistor devo usar ??
@@funaro13 - 3.6v 700ma em uma fonte 5v qual resistor = (+5V - Resister -Anode LED Kathode-Gnd) ( 5 - 3.6 = 1V4 ) V / I =R ( 1V4 / 700mA = 2R Ohm ( P = Watts ) V * I = P ( 1V4 * .700 = 0.98Watts = 980mW )
need 2ohm 2Watt Resister. ( P / I = V ) ( .98 / .7 = 1V4 ) ( P / V = I ) ( .98 / 1V4 = 0.7 ) Use LED @ 350mA for longer Life. ( 1V4 / 350mA = 2.857 = 3 Ohm ) ( V * I = P ) ( 1V4 * .35 = .49Watt ) = 3 Ohm @ 1Watt. Recommended. Provided the 5V PSU is Stablised 5V.
PS See ruclips.net/video/uEePdwpdCJc/видео.html
@@uksuperrascal muito obrigado meu amigo...
Thanks
6 volt ki battery se yah wala bulb Jalana hai ismein kaun sa resistance. value
1 Wat 25 ohm
Resistance kitne no ka he
Maaf bang itu pake resistor ukuran berapa kilo apa ohm
makasih bang
Se calienta mucho la resistencia algo q no se caliente tanto sugiereme...
What I will ask for that led in shop
Give him screenshot of this led
Bli dmn led nya kak.ad link toko nya
WHAT RESISTOR???
330 ohms???
Whats the value for The resistor?
LOL, he showed you the package.
Is the resistor needed to run the LED cob chip on a 12v automotive electrical system? Is the LED 3v or 12v? Also, will i need 1 resistor PER led if i plan on using multiple LED chips on a board, etc?
This led is 3v vith this resistor make compatibile for 12v input for your car.
@@emirsh6955😅
Solofalta tener 50 luminer de la lupa delas luces reprodutaras a los espejos y los go,goos
Дані резистора?. Дякую
q resistencia usas y da su máxima potencia
MINUTO 1.36 ES DE 330 OHM
Y no se quema la resistencia o el red para conectar varios led necesito una resistencia x cada led?
It's getting hot
Qual site (link) mais acessível para comprar esses LEDs?
aliexpress
Kitne ka led bulb AATA hai
Daiod kon sa hai....
is it done by 7805 IC
Probably, by the resistor.
Applies to blue
Resistor Voltage please
12v
Bahi yar same led mane woofer mae laghi thi sad gai
Music da ki faida bol ke daso
amigo seu ligar um led 3w 3.6v 700ma em uma fonte 5v qual resistor devo usar ??
Cara sem didática nenhuma. Chutador pacas
dude, my god aim the light beam down to the table surface. come on man, think.
एलईडी बल्ब का नाम क्या है और यह कहां से मिलेगा
Bhai ye kha milegi 3 watt ki led chlo mujhe chahiye
pakistan me
ethanai watts bulb
3w
Music mixing in video is very very bad thing... It's very very irritates to ears while listening using headphones.
don't drive high power leds with resistors
Interessante gostei.
Abraço
good
Resistor Number
Please Resistor Number Send Me
Music nya berisik
Resistance value plz
330 ohmios
My ears...you bastard.
Es lad..keszgamelage
Thoo
Is this Islamic Engineering? The stupid does not show current and the voltage drop across the led. How u know its dissipating 3watts?
Is this Islamic Engineering?? Racism is abhorrent
i need 12 volt dc to 3.5 volt dc converter cercut
That led is of 1 w
music sucks
Kitne ka resistance hai