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  1. M

    Power camcorder from 2S li-po

    Hello all. As i'm no member of a camcorder forum I thought i'd try here! I have a Canon HF-11 camcorder. It runs from a smart li-ion pack rated '7.4v' presumably being a li-ion 2S battery. 3rd party bateries are rubbish, so i'm wondering if I can retro fit an external pack in place of the...
  2. M

    2 maxflex 1 button.

    Has anyone tried controlling 2 Bflex or Maxflex drivers from just 1 switch? for instance say you wanted to control 2 separate banks of LED's with just the 1 push button switch connected to both drivers in a dual headlight system? The idea is so save pressing 2 buttons to change levels etc..and...
  3. M

    Help me calculate LED Junction temp

    Hi I have all the figures but I don't know quite how to put it together to calculate a realistic junction temperature. My stabilised aluminium heatsink (old CPU heatsink) temp: 45deg C (with a big fan pointed roughly at it) LED board 7up cutter XP-G R2 at 1000mA (23W) stuck directly to...
  4. M

    Oil cooled LED

    Has anyone tried or thought of filling the front end of an LED light with oil to cool the LEDS? Obviously it would have to be sealed well from the back end round cables etc...but if it was possible and any case design is good so that the residual heat is still dissipated to the air then it would...
  5. M

    Quad XR-E Still the king of throw.

    Having now seen many beamshots from XR-E / XP-E/ MC-E and XP-G it would seem that the quad XR-E R2 with a cutter 4deg narrow lens is still top dog when it comes to throw. (I've got this in combo with the 14deg) The only one that seems to come close is the ledil Iris MC-E but I think you would...
  6. M

    18650 Questions.

    I'm trying to understand how the protection systems work in an 18650 both in discharge and charge. I can't seem to find the answer here. 1. I presume unprotected cells are just 'raw' 3.7V li-ion batteries with no other circuitry? 2. Does a protected cell go open circuit if the voltage drops...
  7. M

    Anodising question (currnt source)

    My anodising kit arrived but I may have to start working with it before I get a bench power supply. I've got a large 12v leisure battery (80Ah) and would like to use it instead of a bench supply. Can I just put a simple power resistor in series to achieve the desired current? So say my light...
  8. M

    Maxflex and 7up XP-G too much?

    I'm just wondering maybe with good heat-sinking if the maxflex could stretch to 7 XP-G. It does boost up to 24v which is above 7xVf's @ 1000mA? (probably question for George if you are reading!!) If it is a question of limits on total power then what about using the 800mA table on the maxflex...
  9. M

    Dinotte style rubber rings.

    Hello fellow lumin junkies! Does anyone know where in the UK I can get some Dinotte style rubber rings to attach lights etc to the handlebars? I'm possibly going to a small XP-G for the wife and kid. Marco.
  10. M

    MC-G on the cards?

    Surely there will be an MC-G on the cards shortly after the XP-G? Marco.
  11. M

    Inexpensive under-cupboard LED project.

    I want to try a cheap experiment: LED's to replace my tube CFL's under the kitchen units (the ones that shine onto the counter). I've bought some inexpensive 10mm LED's but I'm undecided as to how to drive them. Could anyone comment on the most inexpensive/best method: 1) Direct...
  12. M

    Has anyone tested an MC-E to destruction?

    At what point did the bond wires start fusing? What about permnent die damage/colour shift? Marco.
  13. M

    MC-E Ledil Iris Vs XR-E 4up Cutter Narrow

    Which do you think would have the tighter beam with longer throw. Also say for arguments sake the MC-E was driven at 1000mA 4S for direct comparison with the 4 XR-E's? Trout, your Ledil Iris beamshot shots look good, but I was curious about this. I might just order the Ledil and do the...
  14. M

    18650 down the handlebars?

    It it practical to shove series 18650 Li-Ion batteries down inside a handlebar or up a seattube? Marco.
  15. M

    Candles,Lumens, 5mm LEDS and SMT LEDS

    Why are 3-10mm LED's always specced in candels/candela and SMT LED's specced in lumens.? They both have optic domes so I don't understand why an aboulute measure of light output ie Lumens cannot be used for both? I can't even finda formula to covert candles to Lumens. I think candles...
  16. M

    4up Cree MC-E build blog

    A few months back I posted on some 4up MC-E proposals fishing for ideas. Well to date I still havn't built anything yet for myself (despite having all LED's driver other bits etc) as i've too been busy riding MTB trail and some road with the XR-E's. However some friends (3 actually) meanwhile...
  17. M

    Power Car Amp from ciggarette socket?

    I want to put a small sub in my car but dont want to run a cable for the amplifier to the battery. Can I use a ciggarette socket to power the amp? How many amps is a typical socket rated to? I think my renault laguna has a socket in the boot so it would make things easy. I'm not putting in a...
  18. M

    Rear Red LED vs rear filtered White.

    I've been thinking a lot about rear lights recently. I fount an old WHITE star mounted luxeon 3 LED in the garage and placed a red filter infront of it and it looks to me orange-ish. What are poeples thoughts on using filtered White LED's vs using dedicated red LED's under a red diffuser? Is...
  19. M

    MC-E Vf vs temperature?

    There is obviously a clear linear relationship between luminous flux and tempereature, as per the datasheet But does Vf vary with temperature? There is no mention of this in the datsheet. If I have to measue a batch of MC-E's for Vf at varying currents is temperature an issue? Marco.
  20. M

    MC-E separately adressed Solid+Blinky

    This would really confuse people!! I was handling an MC-E the other night and something occured to me (can't see the wood for the trees moment!!) It would be possible to address a single MC-E with say 2 solid on dies and 2 dies adressed separately at the same time running blinky! It would...

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