5mm LEDs - Any love left?

[gurdygurds]

I was just going to ask about the 2032 rechargeable also. I received a Covert today with an extremely strange beam pattern. It's throwing a huge ring well outside of the main beam. Amazon is sending a replacement which should be here tomorrow.

image by Six Pound Cat, on Flickr

Where did you get the rechargeable 2032? Also, how do you charge it? Could you used the new Foursevens Charger?

I'm still loving the Yujis you sent me. I will have to mod a Covert, too.

Thank you,
MK

 

[MKLight]

I was just going to ask about the 2032 rechargeable also. I received a Covert today with an extremely strange beam pattern. It's throwing a huge ring well outside of the main beam. Amazon is sending a replacement which should be here tomorrow.

image by Six Pound Cat, on Flickr

The newest one I just purchased from a Battery Junction over the holidays looks the same...maybe it's the LED?

 

[gurdygurds]

Ugh. Didn't want to hear that. Defeats the purpose of the covert sleeve big time. Hoping the new one doesn't look like this. I'll report back.

The newest one I just purchased from a Battery Junction over the holidays looks the same...maybe it's the LED?

 

[gurdygurds]

Leanburn I'm wondering the same thing. Hopefully I'll have some yuji LEDs to compare it to soon and I'll let you know how close or far off it is.

The tint is less angry for sure, but I wonder how much the output dropped from the brown sharpie mod? It would be interesting to see if the tint changed actually improved the color rendition.

I wish Photons were found up here in Canada, I wouldn't mind trying one with a Yuji...I hope they come in the mail today :hairpull:

 

[lampeDépêche]

Where did you get the rechargeable 2032? Also, how do you charge it?

I got mine from battery junction. Search on their site for "LIR2032" and that will pull up the cells and the charger, too. You can also find it at Azamon with the same search.

They aren't perfect--their capacity is low, and they tend to die prematurely i.e. after only 10-15 recharge cycles. Probably because their is no low-voltage protection on the Photon, so they get over-discharged. But I believe their capacity is as good as that of a pair of 2016s, which is your other option for running higher-voltage LEDs in a coin-cell format.


ETA: I don't know anything about the new Foursevens charger, but I doubt that it can charge coin-cells. You mean the one that comes with the new Mini Mark II? That's designed for an RCR123, so its charge-rate would be a lot higher than a safe rate for a coin-cell.

 

[KITROBASKIN]

After much trial and even more error, here are some photos showing Yuji LEDs in Photons, stock (old) Photon Freedom, Nichia MatchBoxInstruments HF, and Nitecore TIP CRI.

Taken with 7 year old Canon SX20
1.6" exposure, aperture 3.5, ISO 1600, white balance set for sunny day


MBI HF Nichia warm on lowest mode
https://goo.gl/photos/X4mAhWS9vBgLmrwKA

Yuji warm in Photon basic model (direct drive fresh 2032 battery)
https://goo.gl/photos/z6A4gE6F1XJ1jNwe7

stock Photon Freedom maybe 10 years old with new 2016's
https://goo.gl/photos/sCBvyhrwTupr2RFJ6

Yuji daylight in Photon II with new 2032
https://goo.gl/photos/FgGofMJPMU5DhbWX9

Yuji daylight in Photon Freedom with fairly fresh 2016's (Notice overexposed image, showing a brighter beam than the new 2032 battery, direct driven Photon II)
https://goo.gl/photos/i3Toe3mxYK11725Z8

Nitecore TIP CRI more recent production on lowest mode
https://goo.gl/photos/1SbM7jQWNRdYtcFWA

Nitecore TIP CRI earlier version 2 on lowest mode (has a wider beam and less throw that later version)
https://goo.gl/photos/6rd16e6YvnDMfMU89

Some differences are exaggerated compared to what I saw. And the long exposure, while not replicating what the eye sees, allows the low light emitters to show how they can do with colors. A YouTube video is forthcoming, comparing tints with sun inside our house.

 

[MKLight]

I got mine from battery junction. Search on their site for "LIR2032" and that will pull up the cells and the charger, too. You can also find it at Azamon with the same search.

They aren't perfect--their capacity is low, and they tend to die prematurely i.e. after only 10-15 recharge cycles. Probably because their is no low-voltage protection on the Photon, so they get over-discharged. But I believe their capacity is as good as that of a pair of 2016s, which is your other option for running higher-voltage LEDs in a coin-cell format.


ETA: I don't know anything about the new Foursevens charger, but I doubt that it can charge coin-cells. You mean the one that comes with the new Mini Mark II? That's designed for an RCR123, so its charge-rate would be a lot higher than a safe rate for a coin-cell.

Lampe,

Thank you for the information about the LIR2032. Regarding the Foursevens charger, I was asking about the one included with the Mini Mark II. I wasn't sure if it automatically adjusted its power. Good to know, as I was going to try to charge a 10180 from it, too...I won't try it now. 🙂

Best regards,
MK

 

[KITROBASKIN]

This video shows Yuji tints with ambient sunlight compared with other flashlights. The MatchBoxInstruments HF color temperature is unknown to me but I would suspect it may be ~4200K , I really do not know. Also the pinchlight description at 1:44 is incorrect but described correctly later in the video.

http://youtu.be/ct4aWQTdjaI

 

[LeanBurn]

Having just modded my Dorcy Penlight with the Yuji LED....all I can say is its the closest thing to incandescent for color rendering I have ever seen. Whatever output deficiencies I thought it would have are unfounded as it outperforms the Nichia it replaced using the same batteries. The 3200K is more like a creamy white than caramel to my eyes.

- beam pattern has no discernible hot spot in its 45* spread.
- works fine with (2) 1.5V AAA batteries

...my only concern now is fighting the urge to needlessly purchase other 5mm lights just so I can throw the stock LED out and put the Yuji in...:devil:

 

[Hondo]

LeanBurn, sounds nice! Is that the Dorcy with the sweet natural aluminum finish, and a little cone reflector on the front? I have that, and it is just direct drive. If you have a DMM, can you check the current at the cap? That will be the LED drive current. Use the highest amp scale you have, as internal resistance on lower scales causes a lot of error. (uh, do as I say not as I do? - I forgot that last bit in the middle of my Gerber mod, and now I'm not sure how high the drive current is - more than 42 mA though). After a couple of hours of use in my Gerber this past week, I am beginning to think these Yuji's could be fairly tough when driven well beyond their rated drive current. It would be nice, as their low Vf tends to result in a hard overdrive in many lights.

I had not considered that light until now, but it sounds like a dandy host!

 

[lampeDépêche]

Hey, Leanburn, glad you got your LEDs!

That Dorcy--is it the 41-1218? And what was the mod like: any soldering, or just press-fit?

 

[LeanBurn]

It is indeed the Dorcy 41-1218 (Amazon for $5). The simplest direct drive 2AAA-5mm LED circuit known to man.

Before doing this mod, turn it on and behold the Nichia...in all its glory. Then undo the front part of the penlight and then by simply pushing the stock LED/plug combo with very little pressure it will come out with the Nichia LED legs through and around the plastic plug, no soldering, just friction fit. Remove the Nichia and put on the Yuji and install the plug. Turn the penlight on and and even though you are a man it will be hard to hold back the smile of joy at the perfect tint, perfect beam pattern with zero artifacts..just perfect. Compare it with a nearby incan and you will continue to smile...even more.
😀

I have had zero issues. I don't have a DMM sorry.

 

[lampeDépêche]

...Turn the penlight on and and even though you are a man it will be hard to hold back the smile of joy...

Tee-hee! Luckily, I'm the kind of man who has never worked that hard to hold back my smiles of joy, rare as they may be.

On the other hand, that Hondo--his avatar makes me think he might be one of your tight-lipped, poker-faced kind. So if he grins, too, then that will really mean something!

Thanks for describing the mod--sounds like it might be even easier than the Photon mod, which is dead easy.

 

[NutSAK]

Remove the Nichia and put on the Yuji and install the plug. Turn the penlight on and and even though you are a man it will be hard to hold back the smile of joy at the perfect tint, perfect beam pattern with zero artifacts..just perfect. Compare it with a nearby incan and you will continue to smile...even more.

SOLD! 😉

 

[lampeDépêche]

I just got a PM from TheCleanerSD asking for a few Yuji's, and I think those will be my last ones. (Don't worry, Gurdygurds, I've reserved a few for you whenever your SASE gets here).

So I'm out of the give-away business for now--I had a hundred LEDs, and now I don't.

But it has been fun! The people here at CPF are great, and I have had a few nice exchanges with people I would not have talked with otherwise. As I said earlier, I also learned that there are more women on this forum than you might think from reading people's names and handles.

Thanks for playing, Hi CRI fans! May all your lights be warm and beautiful!

 

[gurdygurds]

Awesome, thank you sir. Not sure how many you've been sending people but you can just throw two or even one in for me so more folks can get a chance at them. 🙂

I just got a PM from TheCleanerSD asking for a few Yuji's, and I think those will be my last ones. (Don't worry, Gurdygurds, I've reserved a few for you whenever your SASE gets here).

So I'm out of the give-away business for now--I had a hundred LEDs, and now I don't.

But it has been fun! The people here at CPF are great, and I have had a few nice exchanges with people I would not have talked with otherwise. As I said earlier, I also learned that there are more women on this forum than you might think from reading people's names and handles.

Thanks for playing, Hi CRI fans! May all your lights be warm and beautiful!

 

[LeanBurn]

Awesome, thank you sir. Not sure how many you've been sending people but you can just throw two or even one in for me so more folks can get a chance at them. 🙂

Are there any Canucks out there who missed out? PM me.

 

[Hondo]

I have had zero issues. I don't have a DMM sorry.

No worries, I have DATA. Great idea to run one off of 2xAAA, very close to what a Gerber Infinity Ultra does. I got 34 mA on the 200 mA scale, and 0.04 on the 10 Amp scale. So it is overdriving a fair bit, but it also looks like the 43 mA reading I took at the LED during my Gerber mod may not be so far off of actual, even though I had the meter on the 200 mA scale. Not sure why there was so much more difference at the tailcap, other than being in the 160 and 350 mA range, but hey, I'm an ME, not a EE.

So anyway, using my GIU now, and it shows no sign of fatigue, and the DD Dorcy 2xAAA mod draws less current than that, using brand new AAA's, BTW, so should last a good long time in there. And yes, that beam does put a big wide smile on the Duke's gnarly mug!

 

[zs&tas]

Bump for the big yes and have a inova x5 red incoming 😉 happy days.

 

[phosphor22]

I just got a PM from TheCleanerSD asking for a few Yuji's, and I think those will be my last ones. (Don't worry, Gurdygurds, I've reserved a few for you whenever your SASE gets here).

So I'm out of the give-away business for now--I had a hundred LEDs, and now I don't.

But it has been fun! The people here at CPF are great, and I have had a few nice exchanges with people I would not have talked with otherwise. As I said earlier, I also learned that there are more women on this forum than you might think from reading people's names and handles.

Thanks for playing, Hi CRI fans! May all your lights be warm and beautiful!

Thank you lampeDépêche for sending all the LED's out into the world... I am sure pleasant little warm beams of light are entertaining lots of folks - me included