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Old 03-26-2012, 06:44 PM   #1
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l.e.d brighter?


hi all

i need abit of help its d.i.y help but on a vehicle so hoping somebody can help

im building a project moped and will be using l.e.d's as rear lights im just having abit of an issue, they dont seem to be bright enough

is there away to make them brighter? they are on a 12v power supply from the battery, i have look on google and mentions about using resistors or variable voltrage regulator but im new with electrics so im abit lost

if anybody could help that would be great

thank you

lee

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Old 03-26-2012, 11:44 PM   #2
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l.e.d brighter?


To give you a more accurate answer, we need to know what kind of LED you used. Note...it's LED, not l.e.d.

Resistors will not solve your problem. I'm assuming your using 'off the shelf' LED lights intended for tail lights. If your using LED's from some place like Radio Shack...then you would have a resistor in series....in which case, you would reduce the resitance value.

Time to learn a bit about Ohm's law.

The LED is going to have a 'desired' current level...once you know that, take the voltage, subtract the voltage drop of the LED...divide by the current and you have the value of the resistor. Make sure you take into account the wattage.

If you want standard LED's...SuperBrightLED.com is a good source for automotive LED's...resistors are built in...you just pick how bright you want them.

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Old 03-27-2012, 12:02 PM   #3
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l.e.d brighter?


thanks for your reply

these are the LED that i purchaced

http://www.ebay.co.uk/itm/3207590154...ht_1898wt_1037

but as they wouldnt flash on the moped wiring i had to purchase a turning signal resistor, this one

http://cgi.ebay.co.uk/ws/eBayISAPI.d...ht_4146wt_1270

so now the LED's flash, which is a step forward but could do with them being slightly brighter, is this possible with these LED's (im a complete noob when it comes to electrics, sorry)
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Old 03-27-2012, 12:36 PM   #4
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l.e.d brighter?


Sorry...but your not going to get any more light out of those. They are not intended as brake lights....just indirect 'accent' lighting...guys typically take them and attach them under the car.

The turn signal issue is normal. The current draw on LED's is not enough to activate the bi-metal strip in a typical turn signal so you have to use an electronic one. Very common problem.

I would have a look at the SuperBrightLED site....there is one section just for automotive lights.

And once again...resistors are not going to solve your problems.
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Old 03-27-2012, 12:54 PM   #5
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l.e.d brighter?


ah i had a feeling that they wouldnt be able to go any brighter

thanks for your reply i will have a look on the site
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Old 03-28-2012, 12:18 AM   #6
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l.e.d brighter?


Those leds are not hi output types, which is what you need !
Source some high output leds,
from specialist electronic suppliers,
And check the specs for output measurements.

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