i did it: smalles possible MC-E aspherical

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mash.m

mash.m

Enlightened
Joined
Nov 24, 2007
Messages
666
Location
Germany
yesterday i had some time to complete my ultrafire wf602c. now it has a mc-e from dx and 13mm aspherical lens from surplusshed.
in original condition it was a seoul p4 with a small reflector and a little boost converter so you have the option of a nimh aaa.

but now to the details: i put out the middle piece so the 602 will be 15mm / 0,59" shorter. the next picture show the middle piece wich is removed now:
4swf-39.jpg


after this i put out the converter (i use a aaa lion), glued the aspherical glass lens into the head and glued the mc-e with loctite thermal adhesive.
sorry but i have no pictures from this steps. but if there is any interesst i disasamble the head and make some pictures.
the flashlight looks very used, cause this is my "all day use" light. it is allways on my side and i use it very often.

now i have a very short and small mc-e light with an aspherical lens:
4swf-34.jpg


one more picture...
4swf-35.jpg


some glow powder with epoxy in the holes.
4swf-36.jpg


and now a beamshot. flashlight distance to the wall 4,5 meters / 15 feet, light diameter 1 meter / 3.3 feet complete over all four dies:
4swf-37.jpg


the die isn´t 100% focused. but i don´t get it better. there is no space between the mc-e dome and the lens. the back focal lengh is a little to short for the mc-e. but i for me it it ok.

the ligth will draw 1.4 amps from a fresh aaa lion. i know that this isn´t very much for an mc-e, but the efficiency is with this current very high. the light get warm after 30 seconds and hot after 90 seconds. i don´t know the runtime. i used the light often for only some seconds.

markus
 
Last edited:
:poof: really nice, i like those small monsters ^^ how do u drive the MC-E? 14500 dd?
 
I pray that you are at least using AW's cells!
we don't want to hear of you blowing off your
b@lls after you run this light for a while, and
then throw it in your pocket! :poof::poof::poof:
But, it is still a neat little build!
Where did you get the aspheric lense?
I actually have a bag of 150 of them in a
20mm size i think:whistle: from USPlastic.
 
4 c is no problem. i use only protected cells for this flashlight so my balls are safe:p there are some lion cells that are capable of 20c discharge. but i don´t need them. maximun current is 1400mah.

@sabrewolf:
the lens is a glass (not plastic) lens from:
http://www.surplusshed.com/

they have realy good lenses (from time to time) for realy good prices. shipping all over the world - fast and secure.

markus
 
All the battery and discharge points aside, I really like the build. :twothumbs I'd really like to see/own an aspherical 1xCR123 light but don't know of any on the market. :thinking:
 
Nice creative build. Consider throwing the cells away after no more than 3 or 4 uses.

4C = certain damage with or without a protection circuit.
 
Interesting build, it's certainly a winner in the smallest host for a quad-die LED catgory.

I was actually considering trying to buy an old used LF2, then swapping the XR-E in there for an MC-E. But I decided it wasn't really worth it when the light is only driven at 700mA. The amount of lumens I'd expect to lose from self-shadowing would probably offset the efficiency improvement by splitting the current across 4 dice. Although, I didn't consider using an aspheric.

Now, on the otherhand, a single AA MC-E host seems like a potential winner. In that case, a LiIon could safely source closer to 2 amps, rather than only ~700mA.

I'd love to see a custom AA twisty with a 5A or 6A neutral/warm MC-E in there, and a multimode driver. A light like that would be quite the sleeper. On a low setting, it could also be a VERY efficient floodlight producing reasoanbly long runtimes despite the small easily pocketable size.
 
HarryN said:
Nice creative build. Consider throwing the cells away after no more than 3 or 4 uses.

4C = certain damage with or without a protection circuit.
Click to expand...

i used these cell for a long time without any problem. my first build with this 602 was with an cree q5. the current draw was 1000mA. i used the light over 1 jear with only 2 cells. one charge per week. one in the lamp, the other as spare to change when it was emtpy. now use these two cell again with no measurable loss of capacity.
i am driving the cells over the limit. i know what can happen if you handle lions wrong. but i am an electronic engineer, so please trust me - i know what i do.

@all
sorrry, my mistake - no protection...

markus
 
Hi Markus,

I can't say that I am surprised by your success with discharging 10440 cells at over 2C. Here is a thread from a while back where I was putting forth my thoughts on why this may be safer than discharging larger Li-ion cells at rates exceeding 2C. The gist of my supposition is that the small diameter of the 10440 cell allows them to dissipate heat better than other Li-ion cells and helps prevent thermal runaway that causes :poof:.
 
toby_pra said:
Markus,

would some outdoor beamshots be possible???:naughty:
Click to expand...


yes of course. please tell me the condtitions you like...
next week i get my new cam, still hope that it will make some better picture. it´s a sony dsc-r1...
but i makke some with my actual cam.

markus
 
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