Recent content by spaech

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    Luxeon Rebel LEDs

    Trust me, the rebel-->rebel star-->heatsink mounting method, using a stove hotplate to solder the rebel to the star, is quick, easy and reliable once you've done a few of them. You end up with a nice robust star-mounted rebel with good thermal management at significantly lower cost compared to...
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    Luxeon Rebel LEDs

    I've noticed the same - very little heat at 350mA and a hell of a lot of heat at 700+mA. I think the problem you're having with heat dissipation is a combination of things: You've soldered them very close together, which is going to challenge any heatsinking setup, considering the heat these...
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    Mounting Rebels LEDs

    If anyone's looking for a straightforward, effective method for soldering & mounting Luxeon Rebels, this method has worked well for me (after experimentation with a few other methods): Take one rebel: Place it somewhere upside down so that it won't move around too much when you're soldering...
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    Mounting Rebels LEDs

    I've tried mounting rebels by soldering the heat pad directly to a chunk of copper. Very tricky because the solder solidifies almost immediately because the heat is taken away from that area due to thermal conductivity of the copper (it is a heatsink after all). It's possible, and it does give...
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    LED grow light (blue and red)

    Hey there. I'm attempting this exact thing with some luxeon rebels (see the link in enLIGHTenment's post). People have used red & blue LEDs to successfully grow plants, though I haven't seen any cases using high power leds like luxeons or crees. Currently I'm running just one red & one blue...
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    Rebel stars available

    Great link, I think I might be able to use those stars. Any idea how to solder a rebel to them? I just have a plain jane soldering iron and it looks like those require surface mounting. Also, what about heat sinking? Something that size won't be able to sink the heat from one rebel let alone...
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    Project: multiple rebels, huge output

    Yep exactly, I'm using red and blue at the moment for testing, but plan to add royal blue to the mix later on. There aren't really any additional control complexities with this setup (in terms of Vf reqs) because I intend to put the different coloured LEDs on separate circuits so I can control...
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    Project: multiple rebels, huge output

    Thanks for the comments. paulr: Point taken about using a limiting resistor for each parallel string. I'd like to use a more efficient dimming method, but that's probably beyond the scope of the initial experimental phase (and probably beyond my electronics knowledge just now). PWM sounds...
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    Project: multiple rebels, huge output

    Hey CPFers. I've got a bunch of Luxeon Rebels on order and I have plans for them. Not a flashlight, but a fixed light run on DC from the wall. What I want to do, essentially, is to create a bloody lot of light. And I want it to be dimmable (continuously not discretely). I plan on driving about...
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