*BLF LT1 Lantern Project) (updated Nov,17,2020)

We could increase that to 40 hours on max by removing all but one chip on each power channel. :wink:

This lantern could make good use of the Sofirn Q8 extension tubes if designed to fit. Imagine having the lantern fueled with 8 or more 3500mAh cells. Runtime for ever

. :open_mouth:
. :crown: :+1:

Don’t you mean 16 cells :smiley:

driver will be likely without power bank equipped but its there, not sure how this goes

Well yes, but I wasn’t going to be that brash… But I do like the sound of 50,000+mAh… lol

I do wonder how it would behave on a tripod though.

Would make it a very nice night table lamp :slight_smile:

I had not seen that someone was doing extension tubes (I think). That is a very good thing .I have a Fenix TK75 with three extension tubes. Excessively expensive at the time, but a good light. The first set of 4 batteries is “regular” bedside. The next three sets are sitting (charged) in the closet for when really bad crap has happened. I had hoped the Q8 would have extension tubes; but it did not. This is good news for the lantern and the Q8 if available. I am primarily an emergency light person. We have earthquakes, bad storms, Tsunamis, occasional tornadoes, and forest fires. We don’t have immediately active volcanoes; but there are several in the area. Think Mount St. Helens.

Attention would need to deal with vertical stability with multiple extension tubes. A good stand would fix that.

I continue to want some of these lanterns.

Will those driver boards be sold separately in your driver sales thread too, for some who might want to mod their existing Q8 lights or other SRK-style lights?

EDIT: I just noticed your (re)programming pads are there, which is cool. But, looking closer, they are interfering with the ATtiny footprint, or rather the ATtiny footprint is interfering with the (re)programming pads.

There is a picture with 8 extension tubes. That makes 32 cells :wink:

They should.
You are reprogramming the ATTiny with them.

Looks good!
i agree that this first lantern version don’t need the power bank, just the ramping design & built in charging. The AMC design is perfect for this first production lantern model.

as long as its all in parallel & not any series its doable with up to 32 with extension tubes, to create a taller model that can run for days non stop. (the lantern will be a 4P design)

I need clean underpants!!! (scuttles away to change them) Thats better…… WHAT 40 hours by removing a chip or three!? Why has this not been done?

That’s why were going with the simple, easy to modify AMC 7135 driver design. The factory lantern will come with either 4 or 5 chips per channel for a given output on high, but if you want to increase run times in all the modes, (but at a reduced light output) you can remove one or two of the AMC regulator chips. (of if looking to mod it for more output can add chips to the empty 7135 chip pads.

wow that is cool :slight_smile: if Sofirn does use the same battery body as the Q8, then yes the lantern can be modded to a pole-lamp that can run for weeks of nightly use before charging the cells.

No, look at the photos of the driver renderings. At the bottom edge of the driver board, there are several vias for the programming key that he designed. But some of the pads for the MCU cross more than one via and some of the pads for the MCU don’t contact any of the vias. I don’t know if it’s “right” or not but it doesn’t look right to me.

But do you have that many cells that you would trust to put together like that? Would it be worth the high cost of buying that many cells just to not have to charge for a few days?

The MCU outline maybe confusing there. I checked and every Via connects where it should. I don’t think Lexel overlook that noticable problem. It is fine. :wink: