COINLight Ostar for bikelight? How?

[NickHalmshaw]

Hi all

Im thinking here, two COINLight Ostars set in a slab of aluminium for my bike. Im aiming for 1000+ lumens. Weight and battery size isnt too much of an issue.

Only problem is they require 24v each and the Osram driver only operates at AC voltages. (Needs to be battery powered)

Could I just couple together lots of 18650 batteries to the sum of 24volts and put a switch in place?

Ideas for best implementation would be super.

 

[snarfer]

I thought the coinlight had a heatsink built in. Or so I was led to believe by the OSRAM datasheet.

 

[ash_dac]

Any news on the osram Coinlight?

 

[NickHalmshaw]

Im trying to figure out how to power the Ostar, but its proving difficult. In that, it requires 20 volts. At the moment my plan is to house it in a 35mm plumbers compression coupling lol

Im no expert on making battery packs, but to me it seems as though it would need 20 AA NiMH batteries at 1.2v each at around 2600mah for a half decent run time.

Then the second problem would be what spec charger to use to charge the pack.

Third problem is sourcing LEDIL optics in the UK without paying Digi-Key UK an extortionate £12 shipping fee.

Ive read that people are using 18650 batteries in much less quantities in order to power high power LEDs. I really am not sure...

If I can get advice on the battery pack and charger ill be well on my way to making it!!!

Nick (On a budget)

 

[snarfer]

You need a boost driver.

 

[mash.m]

You need a boost driver.

like the shark from the sandwich shoppe...

 

[NickHalmshaw]

All done.

Bit of a n00b effort but it stills works well nevertheless.

Bought the 32 degree lens and its a bit too wide but gives good peripheral vision in complete darkness.

Used 20 AA batteries lol, its not as bad as it sounds. At 1A runtime is about an hour and a half, maybe two.