Recent content by ifor powell

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  1. ifor powell

    DIY bike light with some special features

    I think I would let you past if you came up behind me, I don't like riding in my own shadow... That is some realy serious light. I would not want to meet you coming the other way I hope you can dim it quickly.
  2. ifor powell

    DIY bike light with some special features

    Sorry no writup on the bike computer. Best I have are some pictures of version 1 and 2 at https://picasaweb.google.com/iforpowell/Bike_Computer?authuser=0&feat=directlink You can get an Ant module from Sparkfun. Coding for Ant is a bit tricky but at least Ant now have the Ant+ specs more...
  3. ifor powell

    DIY bike light with some special features

    For my speed based control. The lights have have had a made where they except a light level sent from my home made bike computer. Curent setup has a serial link for the bar light and an Ant based radio link for the helmet light. I use TaskLed drivers but reprogram them. Next version will be...
  4. ifor powell

    Spike Light - V3

    Which Avr is it?
  5. ifor powell

    DIY bike light with some special features

    Re: diy bike light with some special features That's a lot of light. Glad to see someone else working with speed based controll. I have had it on my home made systems for a couple of years now. Nothing like the light you have but plenaty for 24 hour racing and the speed based controll gets...
  6. ifor powell

    Driver, LED choice& battery - desiging a bike lamp, CREE XML T6 or P7 etc?

    Forget the easy white, no good optics for your use and not as efficent as the xml. 3 Xml in series. You need to choose the colour tint, maybe a mix? 4 cell lithium cells of whatever flavour you want. H6flex driver from TaskLed. All that is left is the optics and the hard mechanical bits...
  7. ifor powell

    Faster than the speed of light...

    Nothing I know of fits the bill very well at that budget. Magicshine is your best bet but you will need multiple batterys for 10 hours on full power. A decent homemade would be do-able at that that price, maxflex and the 7 up xpg board can put out a lot of light and should work off the bikes...
  8. ifor powell

    DIY-project: Headlamp with 6 XML-leds!

    I have made some Night Orientearing head lamps (getting on for double figurs now) but nothing with xml for O although I do have a 4 XML bike light setup. Running will help with the cooling and I have reduces the weight of my lights over time. My curent bright light setup is a 7 xpg setup...
  9. ifor powell

    Cree does it again-160 lumens per watt @350 mA

    We are getting close looks like pricing will be close to double and xg-g.
  10. ifor powell

    Zebralight Headlight for Helmet?

    The zebralight headlights are mostly pure flood and not at all suitable for biking in my opinion. A 120 degree beam that's good for 5-10 meters will not let you go very fast. You need a maximum of 20 degrees and most people would be looking for less than 10 for a helmet light.
  11. ifor powell

    Rebuild 36V 2.4 AH NiCd to new technology

    Chargeing the packs joined up together is OK. I do this with 2 3S packs. The balance board I have has 3 sets of 3S lines up and 2 lots of 4S and 5S. I have an iChartger 208B and am very happy with it. It's nice and robust and has suvived me doing some stupid things with it like pluging in...
  12. ifor powell

    Quick question about linear regulators

    The excess voltage is turned into heat. Lower levels will have longer runtimes than higher levels the curent is lower. e.g. a 2.5A curent high will thoeoreticaly be 1 hour with a 2500mAh battery. A 250ma curent low will be 10 hours with the same battery.
  13. ifor powell

    Are there any computer-programmable lights out there?

    I am not using the hardware USI on the Tiny85 for the serial it's software serial. The code is based off Amtel aplication note and works well enough for just reciving a single byte level. The Helmet mount version is more complex as I need rx and tx to talk to the Ant+ radio chip so I have had...
  14. ifor powell

    Are there any computer-programmable lights out there?

    Modern TaskLed's Flex drivers have a Tiny85. I have various reprogramed versions in a number of my home made lights. On my bike lights I have them set up so I can controll them from my home made bike computer. The bar light had a uart RX channel. The helmet setup is more complex with an...
  15. ifor powell

    Rebuild 36V 2.4 AH NiCd to new technology

    The best ready made battery I see matching you is this http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11037 a 10S 4500 mAh LiPo Not at all bad value at $99. size want fit in your box. The problem is you will need a hobby charger with 10S. Two 5S packs may be better e.g...
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