Recent content by nleahcim

fenix-store
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    That can narrow beam

    I have a flashlight I got in Shenzhen about 6 years back that is finally starting to die. The best feature it had was that you could adjust the lens on it such that you could focus the light into a square (the shape of the LED) or you could spread it out like a normal flashlight. I use that...
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    Anyone here riding with polymer li-ion battery packs?

    I'm planning on doing this. My plan is to make a hard case that can survive a decent impact, and then surround the battery itself rubber or foam that just barely fits in the case. I haven't totally figured out if I want to seal it, or vent it, or what...
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    CC regulated drivers in series?

    It'd take a very strange driver to be OK with that. 99/100 will not work in that configuration.
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    M-Zeppelin M6 triple MC-E mod using MZP7-3 sink

    So how are you heatsinking the P7 version? I mean - it looked like you wired the LEDs in series and tied the slugs to your heatsink - but aren't the slugs tied to the P7 anode? So aren't you creating a short there? Also, for the MCE version, are you mounting the LEDs directly to the heatsink...
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    FistoRAY - Weaponlights Redefined

    Only 45K lumens? I thought you said this thing was supposed to be bright? ;)
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    Where to get custom MCPCBs produced?

    Hi - has anybody found a cost effective source for custom metal core PCBs? I noticed that Cutter Electronics seems to offer this as a service - anybody had anything quoted by them? I'm looking for just a one off sort of thing... So I'm hoping to avoid having to order an entire panel...
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    Smallest way to get about 1-2K lumens?

    Hi - I'm looking for the smallest (in terms of physical dimensions)/most efficient way to get about 100-2000 lumens of neutral white light. Right now I'm thinking 3 Cree MC-Es. For optics - I'm thinking I'll use three Ledil boom reflectors arranged in a triangle. The three of them would then...
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    Parallel batteries

    Well... yes and no. Yes - when the sets of cells are balanced with respect to each other - it will work fine. But having two switches makes me nervous - I'm worried that you'll use only one switch at a time or something... because that could then cause the sets of cells to become unbalanced with...
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    Parallel batteries

    The way you have it drawn you'll be paralleling two cells with one cell. I'm not sure if the series resistance of your cells is enough to cause them to catch fire, or just die. Either way, badness. It'd be a lot better for you to have two sets of parallel cells.
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    Bike Cree XR-E Project

    Wow - that is a good size for IP67 rating. I'm looking for connectors for a similar application and I had been thinking about the Hirose HR30 series. They're about $15 for a mated pair and come both in cable and panel mount versions. How much are those Binder parts?
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    Bike Cree XR-E Project

    What sort of connector are you using on the backs of your LED housings?
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    TriNewt Battery EXPOSED!

    You should try measuring the voltage across the individual cells - see if any are completely out of balance. I'm not sure what the specific failure these guys have had - but when I've seen Li-ion packs fail it's typically 1 cell in the pack - not the whole pack - so you can often find one cell...
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    Did you ever lose some of your magnatizm, when soldering magnets?

    Just an idea... You could use some conductive glue instead of soldering.I've never used it myself, but I imagine it'd work.
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    TriNewt Battery EXPOSED!

    So why are you so sure that it's the batteries that need replacing? The PCB looks fairly complicated - lots of parts that could have died on it...
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    Suggestions for LEDs for city cycling

    I'm not sure what an HID retrofit is - googling just turns up results where people replaced their stock lights in their cars with HIDs. I am not a fan of HIDs because, as far as I understand, HIDs are more fragile, take time to turn on/turn off, and cannot be dimmed. The last of those is the...
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