Hi All,
I want to mod my phillips saferide bike light to run off a 12v supply I have at the handlebar from a DC-DC convertor from the bike battery.
The light is great but the run time on high is now only 20mins which is too short for my commute. It use to be longer but seems to have dropped from when I came off in the ice.
(The 20mins seems to be a common problem with them)
I have measured the voltage across the LEDs and got 5.6V on low and 6.63V on high so with that i planned to get one of the convertors linked to in the other LED light thread and turn the voltage up to 6.63 and thought that would be it.
I have since read that LEDs need a constant current so looked at constant current drivers on deal extreme but in my mind I can't work out if it is a constant current what voltage would be supplied or does it not matter.
I then read about the bflex drivers from taskled which are probably overkill and all the modes confused me .
So in short do I need one of these:
LM2596HV DCDC Step Down Converter Adjustable + Heatsink | eBay
one of these
3.6V~16V 925mA Constant Current LED Driver Board for Cree and SSC LEDs (4-pack) - Free Shipping - DealExtreme
or something else.
Thanks
Mutmost
I want to mod my phillips saferide bike light to run off a 12v supply I have at the handlebar from a DC-DC convertor from the bike battery.
The light is great but the run time on high is now only 20mins which is too short for my commute. It use to be longer but seems to have dropped from when I came off in the ice.
(The 20mins seems to be a common problem with them)
I have measured the voltage across the LEDs and got 5.6V on low and 6.63V on high so with that i planned to get one of the convertors linked to in the other LED light thread and turn the voltage up to 6.63 and thought that would be it.
I have since read that LEDs need a constant current so looked at constant current drivers on deal extreme but in my mind I can't work out if it is a constant current what voltage would be supplied or does it not matter.
I then read about the bflex drivers from taskled which are probably overkill and all the modes confused me .
So in short do I need one of these:
LM2596HV DCDC Step Down Converter Adjustable + Heatsink | eBay
one of these
3.6V~16V 925mA Constant Current LED Driver Board for Cree and SSC LEDs (4-pack) - Free Shipping - DealExtreme
or something else.
Thanks
Mutmost