I got these ones for my C01S from FastTech: https://www.fasttech.com/p/4113703
I noticed that at 90 degrees on a smooth metal surface, the light may slip a bit (though I’m not sure if that’s about how strong they should be.)
I think you must have a bit of luck with these magnets how magnetised they are. Sellers like banggood and Fasttech for sure will not check their magnet batches, a bit less magnetised will go unnoticed. I was lucky with a small batch that is pretty good (Fasttech, 2 years ago), my C01 sticks fairly well. Any new magnets I may buy from supermagnete.de, they claim a reputation for good magnets.
All my blacks have been potted, but none of the green, brown, orange, and red ones. Nice colors, btw.
The 670nm C01 is nice. It’s visibly deeper red than the 660nm C01S (Cree emitter). The uneven beam is no problem to me, but it’s, well, a thrower to some degree. Maybe I’ll sand one of them to get a larger spot.
I’m very happy about this 2nd edition C01’s with some more incoming . Thanks, Sofirn!
Edit: and thanks, rngwn for making this possible in the first place.
My little Yuji light is one of my favorites. If Sofirn makes these available on Amazon like they do for most of their lights, I will buy several more for gifts, even if they cost a few dollars more. But I won’t order from China anymore. Simon @ convoy is the only exception. This 2nd edition sounds great.
to address the “Battery vampire” question, I`v done a test and they will work right down to 0.46v! maybe even lower if I let it, but the light at that voltage isn`t really usable anyway, the led looks just about lit even in the dark.
But the caveat is that you need to be at a higher voltage than that to get the driver board to fire up in the first place! and once it does you have to leave the light running and not turn it off at all else it wont turn back on again.
I`m not sure what the minimum trigger voltage is, I`m guessing at least 0.7v, but it Will run a battery down to Well below this if you just leave it running
A small addition to that, an effect that helps a bit: almost empty alkaline batteries tend to recover their voltage a bit when the load is taken away, it may take some time. So even when you switch the light off at say 0.5V and the light will not turn on again, after a while you may measure over 0.7V again, maybe enough to fire up the chip. Once the light is on the voltage nose-dives back to 0.5
This is making me want an AA version of the C01 now!
Surely I`m not the only one that would love to see this scaled up a little (but still identical) to accomodate AA batts?
maybe a bigger magnet slot obviously, but still with a single Sophia or Yuji Led.
These would make great emergency “candles” around the house!
I got both a red (670nm) and black (3400k) C01 and both are potted. They’re nice little lights for going to the toilet or something. My C01S produces wayy too much light on the low-setting for such a thing, but the 3400k C01 produces a much more diffused (less throwy) and dim, warm light. The C01 670nm has a distinct “squarish” dot, presumably the LED dye being visible by the optics. The LED is indeed dark red (my first “real” red light so I don’t have a lot to compare it to, but two C01R’s are on its way too). I won’t carry’em everyday like my C01S but they’ll probably find a good space next to my night table I’ll try to take some beamshots tonight.
The C01R is insanely bright. For me, I only use low or medium at most. If the red C01 square-ish hotspot irks you… you could mod the LED by scratching it up. I’m in the process of doing it, and it does soften the dye mark in the hotspot.
Why C01R have thicker positive contact and C01 still tiny contacts driver?
Seem already marked by battery and may be a weak point.
It hasn’t been improved
Don’t worry. One of my first batch C01 got lots of use, multiple times a day. Estimate the years you’ll likely spend on earth, divide by two and buy as many lights to be safe .
Frankly don’t need a lot of them for myself
It’s not the first time that it turn on just touching the head involuntary
To avoid that you have to do half twist off,because threads are a bit sloppy and clean contacts often