Collecting interest for a Sofirn C01 host version

I'd end up wanting to hot-rod it, and it doesn't sound suitable. So I'm out on this one. Best of luck, however.

Interested — I have Arc AAAs in blue, red-orange, green, two different UV, and cyan, and they’d appreciate company.
I suspect the 5mm LEDs available today are better (and welcome discussion of appropriate colored and UV LEDs to use)

PS, this would be an ideal host for UV LEDs, and a lot of people might find it handy to have a pocket LED source.
Discussion: site: budgetlightforum.com uv led wavelength - Google Search

I think using UV LEDs with boost or buck converters is always a good idea. They tend to have quite high Vf and so don't work as well with linear drivers.

Count me in for three. If possible unanodised.

I’m old school, I like these old fashioned LED’s. I need to find out where to get the proper Led’s here, I have to learn how to solder very precisely and how to change whatever needs to be changed but that’s why I need 3, so I end up with at least 1 good one. :wink:

This is not a hotrod host for sure, you can put only so much power into a 5mm led.
That said, when they first designed the C01, they told me that they could set the current (which ended up at 25mA). Maybe that is still possible (within limits) by changing a resistor or so.

I’d be interested in 2

Interested in 2 hosts

I’ll do a couple hosts.

I’m a little confused as to why they can’t produce the 5600k version again. I’m seeing the link to the used LED on the C01 page as being available. Is this not the case? I wouldn’t want a host, but I would definitely pick up a C01 even if it was $7 or so if that is actually the LED and it is actually available at that price. Here is the link I found in the original thread: here.

Jos, would it be possible to add some alternative LEDs to the Yuji BC that would fit into the host? Maybe this could increase the interest even more. I must admit I don’t have any idea about good 5mm LEDs. Bedankt! :-)

I had a feeling that there were more reasons to stop the C01 than just availability of the Yuji leds (the more popular 3200K led is indeed sold out). Maybe they simply wanted to move on to the C01S which is the type of light that Sofirn was planning in the first place, even before we suggested to do the C01.

Look at this post:

Someone that is more interested should PM him and see what he ended up sourcing

Personally I have a small collection of 5mm colour leds that would make fun lights. And the very bright white Nichia GS may work well too, especially if you manage to mod the current. I have them from leds.de : https://www.leds.de/leds-komponenten/bedrahtete-leds.html
But there are more sources for 5mm leds too, i.e. on aliexpress and ebay.

He is still on the hunt for good quality but it needs prototyping and testing. I (and maukka) tested some first prototypes for him and the tint/CRI/output were good and comparable to the Yuji leds but the beams were a bit uneven, which could very well be because they were prototypes (sort of handmade). But then the factory stopped communicating and now he found a new source, and some new testing must be done again. If he succeeds in getting them done and selling them they should be very good for use in the C01 host.

in for at least 2

djozz, it might not be relevant to this discussion, but 5mm LEDs are available up to 100mA rated (and maybe higher). They can be bought through eBay as 1/2 watt (even though it would be more accurate to say 1/3 watt). I don’t know about high CRI though.

For these 5mm LEDs, unless they mention specifically of the CRI, you can assume it’s at 70. Part of the reason is the material cost and the fact that the efficacy will drop ~20 lm/w going from 70 to 90 CRI.

If you want to go for the highest output in 5mm package and CRI is not your concern, you can always try that out.

This Australian site appears to show the 5600K as still in stock, but not the 3200K:
https://www.ledsales.com.au/index.php?main_page=product_info&products_id=2062

Yuji themselves also still has the 5600K in stock, in their usual quantity of 1000 pieces minimum.
https://store.yujiintl.com/products/bc-series-5mm

I don’t know of any sources that still have the 3200K Yuji.

As long as we’re on the topic, I looked up a few other options for LED’s you could put in a 5mm host like this.

LED Supply (US only?) has unspecified brand and unspecified CRI of 5mm LED’s in cool and warm white, in addition to numerous different single color options, UV, and infrared.

You can also find combined RGB LED’s with a simple built-in controller that changes the color. Depending on the seller and the type, they are described as a “rotating”, “flashing”, or “dynamic.” An example here, including a video in one of the reviews:
https://www.amazon.com/microtivity-IL604-Slow-Rotating-Resistors-Pack/dp/B007RO9X82

Same here. Hot rod 10440 C01S would be nice. Just like 10180.