I need help with home made

[aknyazhev]

Hi all!

First please sorry me for my English - it's worse (this is not my native language).
I'm going to make a dream-flashlight. I'll be using in the forest. I'll be working on the ground by hands for a long time and I need a comfort flashlight for this.

The body will be this:
http://www.asmc.de/de/Licht-Lampen/Taschenlampen/BW-Taschenlampe-p.html

Electric power:
two D-battery cell (each 1.5v) or two D-accumulators (each 1.2v, am I right?).

Light:
I need a warm white light, with wide angle of light. Carefully for eyes. The smoothly increase of luminous flux in the centre of the light will be a great plus (I really need it. I've tried my friend's brand flashlight - it works great, but on 50 metres with a nasty eye-irritating cold light. When I need to shine right under my foots and around me).

LED:
I expected this LED will be fine:
http://www.dealextreme.com/details.dx/sku.2395
Specified color temperature 3500 K, luminous flux 152.3 lm with max current 700 mA (http://www.cree.com/products/pdf/XLamp7090XR-E_B&L.pdf).

Driver:
Please, help me to select driver on DealExtreme for this LED and this electric power. I can't find a driver with max output 700 mA. Only less or more. I'mm afraid to burn out the LED. Also, the D-accumulators have different voltage (1.2v) than D-battery cells. Will not be a trouble with it? Or I need a stabilized driver?

Resume:
What do you think about my idea? Is it real, which LED and driver should I use, etc...

 

[nein166]

Well if you need a warm white light the one you chose is no good.
That Cree Q2-WC is cold white, not blueish but not warm either.
Cree does make Warm white but DealExtreme doesn't sell them
The code would be Q2-5A for warm white XR-E

This may be best LED for a warm light
http://www.dealextreme.com/details.dx/sku.13613
You will need to affix the LED to metal heat sink. The metal body is a good heat sink. It is not going to work well with the reflector. The reflector space can be used to add more metal for heat removal. Try a copper or silver coin. I think you want a wide focus of light. Use no reflector or a optic lens to replace the stock. Use heat conducting epoxy to hold LED and heat sink in place.

You can try this driver if you like the multiple modes for 3v
http://www.dealextreme.com/details.dx/sku.10084

If your going to use D cells consider 1 of these 3v Lithium cells
Just put a spacer in place of the 2nd D cell space.
http://ralights.com/?id=LithiumDSo2Battery

Or you could use 2 LiSO2 and a different driver that runs off 6v source
http://www.dealextreme.com/details.dx/sku.25518

 

[aknyazhev]

LED

Well if you need a warm white light the one you chose is no good.
That Cree Q2-WC is cold white, not blueish but not warm either.

Yes, you are absolutely right. I've make a mistake with Q2 WC. And I've googled a lot of beamshots (with balance of white, etc. I mean truly right beamshots) and I understand that my friend's Cold White LED flashlight was a falsification or a fake. I didn't found see such a nasty eye-irritating cold light on that truly right beamshots. So I decided that my friend's flashlight wasn't a brand Cold White LED. And I chose a Cree XR-E R2 (WG) withput any anxiety:
http://www.dealextreme.com/details.dx/sku.15943
This is extremly that what I need.

Heat removal

You will need to affix the LED to metal heat sink. The metal body is a good heat sink. It is not going to work well with the reflector. The reflector space can be used to add more metal for heat removal. Try a copper or silver coin.

I'm going to fasten the LED right on the inner side of the back wall of the body. There where the black plastic now (It'll be removed).

Focus of light

I think you want a wide focus of light. Use no reflector or a optic lens to replace the stock.

Yes, you absolutely right. But I'd like not to refuse from reflector at all - this will decrease the whole efficiency of the flash light, I think. Can I sort out a reflector and an optic lens for the Cree XR-E R2 on the DealExtreme or Kaidomain? I don't investigate in this (in diametres, matherial, etc).

Glue

Use heat conducting epoxy to hold LED and heat sink in place.

Are there any heat conducting epoxy glue on the DealExtreme or Kaidomain?
I'm planing to use this:
http://www.dealextreme.com/details.dx/sku.4593
But this isn't a glue unfortunately.

Driver

You can try this driver if you like the multiple modes for 3v
http://www.dealextreme.com/details.dx/sku.10084

I've been advised this one:
http://www.dealextreme.com/details.dx/sku.7882
What do you think about it?
And another question. Can be a driver with changing the modes by clicking the correspond buttons? Without of this inconveniently circle changing? For example I need four modes: max, mid, min and a strobe (slow strobe). And I have five buttons. First turning on (to the last used mode)/off the flashlight. Other four buttons changing the mode to the corresponding when the flashlight is on. It'll be a great plus.

Power

If your going to use D cells consider 1 of these 3v Lithium cells
Just put a spacer in place of the 2nd D cell space.
http://ralights.com/?id=LithiumDSo2Battery

Or you could use 2 LiSO2 and a different driver that runs off 6v source
http://www.dealextreme.com/details.dx/sku.25518

Ol-la-la...
3v D-size accumulator... My dream
Unfortunately the shipment to my country will be 40$. 30$ (two D accumulators) + 40$ = a lot enough for just a power for the flashlight. So I stopped on the D-cell batteries only. In order to buy a power for for flashlight in any stall or shop when it needs.

 

[nein166]

Focus of light

Yes, you absolutely right. But I'd like not to refuse from reflector at all - this will decrease the whole efficiency of the flash light, I think. Can I sort out a reflector and an optic lens for the Cree XR-E R2 on the DealExtreme or Kaidomain? I don't investigate in this (in diametres, matherial, etc).

Reflectors to choose from for XR-E
http://www.dealextreme.com/details.dx/sku.5951 - smooth spot for throw - if you use this one Isolate the bottom with electric tape
http://www.dealextreme.com/details.dx/sku.1917 - wide focus, low throw
http://www.dealextreme.com/details.dx/sku.4544 - very tight focus, all spot for maximum throw like a laser

Glue
Are there any heat conducting epoxy glue on the DealExtreme or Kaidomain?
I'm planing to use this:
http://www.dealextreme.com/details.dx/sku.4593
But this isn't a glue unfortunately.

That product is not an epoxy and will not harden. But you can use it if you screw down the LED Star to the flashlight body.

Driver

I've been advised this one:
http://www.dealextreme.com/details.dx/sku.7882
What do you think about it?
And another question. Can be a driver with changing the modes by clicking the correspond buttons? Without of this inconveniently circle changing? For example I need four modes: max, mid, min and a strobe (slow strobe). And I have five buttons. First turning on (to the last used mode)/off the flashlight. Other four buttons changing the mode to the corresponding when the flashlight is on. It'll be a great plus.

That looks like it will work with 3v if you adjust the screw but I am not sure how
Only one on/off button works to change the modes no multiple switches

Power

Ol-la-la...
3v D-size accumulator... My dream
Unfortunately the shipment to my country will be 40$. 30$ (two D accumulators) + 40$ = a lot enough for just a power for the flashlight. So I stopped on the D-cell batteries only. In order to buy a power for for flashlight in any stall or shop when it needs.

NO NO NO NOT AN ACCUMULATOR or RECHARGEABLE
PRIMARY ONLY! One use and it is dead just like alkaline D Cell but $$$$$$