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 Post subject: How many LED will go with 6V 3W lamp?
PostPosted: Wed Apr 23, 2014 9:52 am 
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Posts: 39
how many LED and Resistor will i connect to get the lamp voltage of 6V 3W?


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 Post subject: How many LED will go with 6V 3W lamp?
PostPosted: Mon Jun 12, 2017 4:02 pm 
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Joined: Thu Apr 02, 2009 7:58 pm
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Depend on the LED, the color, and it specifications.

Does the 3 watts include the power loss in the resistors?

.


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 Post subject: How many LED will go with 6V 3W lamp?
PostPosted: Sat Jul 07, 2018 5:54 pm 
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Joined: Thu Apr 02, 2009 9:54 pm
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Power= volt/current

3=6/2

2 amp

as an led ha to have its current limited to say 10ma then you would need 200 leds

if you used 1 resister to limit the current it would be have to be

a 2.2 ohm 3w resistor and would get hot due to the loading

if you used 1 resistor per led then it would have to be

4400 ohms 1/3w resistor, 200 of these

If you are thinking of using thi idea for a car bulb, then the wattage i different, most led brake bulds say only consume say 80ma, but use high intensity leds.

BUT, if you car is intelligent and has bulb failure indicator, then you may need a ballast resistor to work in parallel to draw more current to fool the car sensor.

regard

j



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