Interest collect for a new Sofirn design: tube style18650, magnetic ring control, USB-C charging, 500 lm max (AKA grandma light)

polarweis · January 22, 2020, 11:55pm

Interested

hodor · January 23, 2020, 1:14am

Thought I had replied but guess not. In for at least one. Thanks djozz et al.

justanotherguy · January 23, 2020, 3:56am

HMM I might be in for 4.

at 500 lumens, what kinda run time on a 3500?
( I just found this 350 post thread)

djozz · January 23, 2020, 6:50am

If a high CRI led is used like the LH351D, I estimate about 1.5A to get 500 lumen, so runtime will be a bit over two hours on the highest setting.

mitsuki08 · January 23, 2020, 10:10am

Interested in 1

algernonramone · January 23, 2020, 3:00pm

Maybe I’m misunderstanding the concept, but will this kind of be like a larger, High CRI version of a Jetbeam RRT-01? If so, I am very interested!

djozz · January 23, 2020, 3:23pm

Good question, it depends on how Sofirn picks this up. If they decide for the infinitely variable ring (it requires a different fairly expensive, more than a dollar, magnetic sensor component, and designing the control for it what they have not done before), it is not far from a 18650 version of the RRT-01, albeit with a bit lower output. If they stick to distinct modes (which is electronically different, probably cheaper and already known to them), it may not look to you like the RRT-01. Mind that the distinct modes outcome is still very much within the scope of this project, for the project I would be happy with that (but I do hope a bit for the variable control because that attracts an extra category of buyers). I hope for a few answers after chinese newyear.

sandanbob · January 23, 2020, 4:18pm

Please add me to the list as a possible buyer.

Lipfit2000 · January 28, 2020, 5:31pm

I am interested in 4.

Chinaheart · January 28, 2020, 7:02pm

Interested for 2

slmjim · January 28, 2020, 8:05pm

I'm already in for one, that remains unchanged.

Just wanted to say; the heck with the kids & Grandma!

Mine! Mine!! Mine!!!

That is all.

Carry on.

slmjim

Andmiller · January 28, 2020, 10:55pm

Put me in for 2

el_duderino · January 28, 2020, 11:04pm

I’m interested in 3, please!

djozz · January 29, 2020, 4:55pm

We are at 250 units on BLF, plus 153 on TLF, that makes 403 total.

That should get us at least into the design phase I think, and once a design can be shown (assuming it is good) that will boost interest again.

I hope that China will soon recover from the Corona virus shutdown so that the design phase can get going

regaia · January 29, 2020, 4:47pm

Sign me up for 2. Thanks!

Rxich · February 21, 2020, 1:27am

That’s incorrect.

251

Count me in for 1

OldSkol · February 21, 2020, 3:25am

I’m interested in one at least
Personal want from wishlist
Magnetic ring, color not black, magnetic base, holster
Thanks
O S

Petr_J · February 21, 2020, 7:48pm

I’ll take two pieces.

LEDicrous · February 21, 2020, 8:05pm

Hi,

Can you please clarify:

TIR optics?
does it have pocket clip and a lanyard?
OK to have a small indicator LED flashing/solid red when voltage is low (instead of simply dim)? This, of course, in addition to the shut off function when voltage is too low.

Also, can you please explain what is a magnetic control ring ?

anonymous_user · February 22, 2020, 2:35am

It might be easier to understand if you look up reviews of a light such as the Jetbeam RRT-01.

But basically there is a portion of the flashlight body that you turn to access the different modes. In some designs, it can be infinitely variable so you turn the ring like a faucet and it will slowly brighten or dim depending on the direction. In other designs, the ring clicks into indents as you spin it and it has specific lumen levels like low, medium, and high. This is more like turning the knob on a pedestal fan.