Recent content by steveo_mcg

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    Magniclight Bike Lights now on sale

    Ouch! That is a lot of money for blinkies! I think I'll stick with my dynamo and add re-lights if I really want additional battery free lights.
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    Cree XML on a dynamo

    Cool, good ideas.
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    Cree XML on a dynamo

    I've been using a couple of xml on my bench whilst trying something else they are impressively bright. According to the datasheet 2 xml @500ma put out about the same lumens as 3 xr-e @ 500ma. Thats a good looking bracket, where did you get it?
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front Aye supercap is across a RED led, yeah I don't think the capacitor would've lasted long across a XR-E. I've managed to use four two for this and two for an upcoming front still thinking of other mischief I can get up to....
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front I try not to think about the cost of my time, even on minimum wage I'd be more economical buying one of those nice German lights. Then again cycling is probably the only hobby to save me both time and money compared with driving or getting the bus to...
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front Steve, they are Yec brand 10f 2.7v caps (ebay item 261113249440), I figured for the rear two in parallel would give me 20f and the voltage would be with in tolerances and upfront I could run them in series to up the max voltage, bit more flexible than...
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    Newb with alot of question and would really appreciate a little help or pointers

    I've done something very similar, a vintage light with a warm light led running off a modern dynamo. The last page of this thread will be very helpful, http://www.candlepowerforums.com/vb/showthread.php?308875-Squeezing-the-power-out-of-a-Supercap/page6
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front I'll check when I got home but they're ebay originals so getting the same ones is probably a bit of lottery. When I was first bench testing I thought there must be an issue with the circuit because nothing happened when I hand spun the wheel after a...
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    Big vs many small

    Don't you need to worry about heat build up in the encased leds?
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front In case any one comes across this thread in the future... The above works fine, 20f supercap takes a few minutes to charge from empty and last more than long enough as a stand light. The caps are probably in the middle of the internal resistance...
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front Cheers Steve, I can see the advantage of then 5mm the spread would be much easier to achive than with cheap dx optics but I'd need to design a new body, the one I have only needs modified. I did some reading and I think it was a comment of yours...
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front Am I reading this correctly? are the emitters all laid out parallel? Sorry I'm not great with proper circuit diagrams. I gave up with the protection diode and wired up the two red emitters parallel and its working very well. But I cannot work out...
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    Tweaking dynamo circuit

    I suspect your cap has a very high internal resistance that limits how much current the emitter receives. In a test I did earlier in the year i was running a warm white for a few minutes with out a resistor. Might be worth just sticking in a very small value resistor and seeing what happens.
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front Reverse polarity protection is confusing me... Should the band end of the diode be connected to the negative or the positive marked terminals of the emitter? Also I tried to connect a super cap across the Cree as a stand light, should this work? It...
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    Run rear light from same dynamo as front

    Re: Run rear light off same dynamo as front I think the problem with parallel is my cheap hub only generates 400 ma and losing 100ma might lose too much brightness up front on unlight roads. I think one should be sufficient if its getting 400 ma. Do I need a blocking diode on the reverse of...
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