Interested in 1 x 3200K and 1 x 5600K
That is a nice project :sunglasses:
Many Thanks
Very interesting developments in this thread.
I'm in for at least one of each CCT.
For potting the stuff of choice should be "DOWSIL TC-6011 Thermally Conductive Encapsulant" from Dow Chemical. This stuff is specifically designed for LED Drivers and it is also the stuff that Zebralight uses in their lights (see this thread on CPF).
Would love brass colored anodizing.
Interested in 1x 3.200K. Thanks!
Interested in 1 × 3200K and 1 × 5600K
Thank you
Interested in 2 x 3200K and 2 x 5600K.
Thanks!
Thanks for the information and link.
I understand that what you linked is a silicone based elastic compound, which may well be good for this but it is not what is used in the E01. From what I read on CPF from someone who managed to remove the driver it is a hard epoxy-type stuff.
I can imagine that the hard epoxy stuff is better at resisting mechanical abuse of the flashlight which is what we are after (combined with waterproofness), while thermal conductance is not relevant at this power level.
Can you imagine how funny it is after this project is launched and became a great success? Then Fenix jumps on the bandwagon. They probably think… damn, we had our chance…
Perhaps they can’t :innocent: . Later more about that.
Interested in 1 x 3200k and 1 x 5600k
Interested in 1 × 3200K and 1 × 5600K please.
Sofirn has given (gifted?) us a much better target price than we imagined getting from Fenix.
So forget my initial interest in post #5.
I’m now interested in 1 copy of every body color Sofirn is willing to make. All in 5600K (old eyes).
I agree that thermal conductance is probably not really relevant (although it might, at least in theory, help to increase expected lifetime of the LED if it is driven above spec).
From what I gather a hard epoxy makes everything completely rigid (and potentially brittle), while a firm (yet not hard) potting material allows a minimal amount of flex and absorbs shocks (but admittedly my knowledge about potting material is limited).
The reason why I suggested this stuff is that Zebralight uses it, and I completely trust them in this regard. Sometime back over on CPF somebody asked Zebralight what components they use in their lights and they answered with a list from which it became obvious that they know what they are doing and always choose the best possible components and materials (e.g. Corning Gorilla Glass, MOSFETs from Vishay etc.).
But it is, if we are being honest, not all that relevant which potting material is being used (after all it is a very small light with few components). Any potting is better than no potting.
I don't know which driver IC the E01 uses, but I think it is worth looking into the Prema PR4401 and PR4402. These are tiny LED driver ICs for single battery (0,7-1,9 V) input with an output of 6,5-40 mA (depending on configuration). They only need a single external component, an inductance (although for higher efficiency it is better to add a few components more).
After a quick look at the datasheet I would recommend the PR4402 together with an 10 µH inductance plus extra components (two capacitors and a Schottky diode). According to the datasheet this configuration should give a LED current of about 23 mA.
I’d be interested in three of each tint.
I like that tail, even though the light wont hang straight since the keyring is not in the middle
I also like the trit slot, although the trit may cost more than the light… choices are fun
Im not saying Sofirn should include a clip, but some people may want to source their own, if so, here is a possibility. I have not tried it and am not sure if this clip fits an E01, it resembles the clip on the Arc AAA
Maglite 2 AAA Mini Mag Pocket-Clip
here is Zebralight “potting”
more info on various types of “potting, encapsulating, and coating” types (epoxy, polyurethane, and silicone). Some are thermally conductive, some are for high temperature, most are waterproof, some are more resistant to other chemicals and solvents… etc:
https://www.epoxysetinc.com/product-reviews/potting-encapsulating-compounds/
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“Thermal cycling can take a toll on your electronics so can unprotected assemblies. Our potting & encapsulation can make a difference in your electronic components.”
HDS potting:
Fenix E01 potting
Thanks for the update Djozz and the list work iamlucky13!
My thoughts:
- I’m cool with no clip since it is a keychain light. However, others may want a clip (attaching to a cap is a pretty functional use, for example, and a reversible clip helped make the Thrunite Ti3 popular in some circles). A basic friction fit clip that can attach behind the head or near the tail, made of aluminum, is probably the cheap and functional solution although not the prettiest or most premium. If anyone has ideas, I can compile a poll for later to see what the interest is in a clip/price point/design thereof.
- PURPLE! :sunglasses: Once the prototypes come out I can make a poll for it. Light Gold on cheaper lights tends to look less than stellar in my opinion, but samples are definitely needed to make an informed decision. I’m assuming those are all the colours Sofirn is willing to make at this time?
- If it came down to trit hole or shorter length, I’d go shorter length. We’ll have to see what Sofirn comes up with.
- It’s good they are willing to try potting.
- It sounds like they were already working on a 5mm AAA twisty. Seems like a win-win situation. 
Interested in 2 × 3200K and 2 × 5600K.
Update will show soon. We’re well over 200 already!
Neither of the options are in the range most commonly referred to as neutral. I’m listing both of you as 5600K (daylight) for the moment. Just let me know if you meant 3200K (warm). Unfortunately, there aren’t any options in between these color temperatures.
Potting isn’t confirmed at this point, but I’m happy to put you on the list for 2 + 1. Please make a followup post if you decide to withdraw or change your quantity as details are decided on.
This will be a nice set. I’ll list you for 3 at the moment. Please plan on a followup post with an updated quantity if Sofirn decides on a different number of body colors, as I’m not likely to remember.
Interested in 1 × 3200K and 1 × 5600K
I would be interested in specifically purple body with 5600K and/or gold body with 3200K. Those would give visual reference to know before you pick it up what “color” the tint of the LED is. But, I don’t know what quantity of each I would want yet, and we don’t even know if those are final color choices. So, I guess just put me down tentatively for one of each tint, and I’ll decide later for sure.