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How to use 12 volts with system of LED's of a much higher voltage Answered

I have a " series " of 27 5mm straw hat LED lights that require much more than 12 volts. I understand that LED's are amp driven, but the voltage requirement must still met. The battery requirement for this amount of voltage is prohibitive. I'm hoping someone can tell me how to light the LED's with only 12 volts getting sufficient illumination that they really shine -so to speak.

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cgcBatterywizard

Answer 1 year ago

BW

I hadn't given much thought to a DC/DC converter, mainly because of space and heat concerns. It seems though the device you suggest remedies that and the battery requirement, for almost 90 volts, also.

I will explore your advice along with the info. Iceng has provided for the best fit. You two have been a wealth of information and education for me. Thanks immensely

cgc210

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cgcBatterywizard

Answer 1 year ago

iceng

Your help has been awesome! Thank you very much.

cgc210

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iceng

1 year ago

WHAT COLOR led ??

Assume white LEDs 3.4vf

Make 9 groups of three LEDs in series with a 90 ohm resistor.

Then put each group across 12 volts..

You will have 27 shiny white LEDs :-)

5mmLEDcolor.jpg
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cgciceng

Answer 1 year ago

Iceng

I haven't gotten around to actually doing this yet, but wanted to thank you much. It seems so simple listening to you. I apologize for the color neglect, they are warm white LEDs.

Will each group of 3 LED's have their own resistor or 1 resistor for all?

Thanks again, cgc210