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1watt led driver with 12v input

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srajesh1268

New Member
I want to make a Solar Street light with 6nos of 1Watt LED, But i do not know how to drive the leds. I tried by connecting indivissual resister in series with each LED, But I could not get maximum illumination from LEDs.

Any one can help me regarding this with a low power dissipation circuit?
 

dougy83

Well-Known Member
If the LEDs are not full brightness, then the resistors value is too large; reducing the resistor will increase the brightness.

For a 'low-dissipation circuit', I would suggest connecting all the LEDs in series and powering them with a boost converter regulating for constant current.
 

Hero999

Banned
I was going to suggest a switching regulator but since you're having problems with a simple resistor, it's probably beyond your current level of ability.
http://www.electro-tech-online.com/threads/led-switching-regulator.41375/

For a 'low-dissipation circuit', I would suggest connecting all the LEDs in series and powering them with a boost converter regulating for constant current.
The power supply is 12V and the LEDs probably have a forward voltage of 3.5V (assuming they're white) which limits you to three in series maximum.
 
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