Lume1-FW3X: Constant Current Buck-Boost & FET Driver with Anduril1/2 + RGB Aux

Is there a chance that some PCBs will have the same layout but bigger diameter (~24-25 mm) to fit 21700 e-swith flashlights?

FW doesn’t use notch anymore but drivers still has it.

Thanks everyone for the great feedback so far, and thanks everyone for your patience.

Just a quick update - the first batch of Lume1-FW3X drivers have been produced. I am arranging to getting some shipped to me so I can validate the build since I have no idea how they turned out yet!

In addition, a lot of people have asked about Aux boards. Neal has produced some RGB AUX boards.

https://imgur.com/po5GYL3
Here's a very quick GIF of what Neal sent over. Tweaking of resistor values in progress for LED brightness. I do not know what his plans are for AUX boards but I see no reason why they cannot be offered for sale as well. Please excuse the odd effects from video to gif conversion.

More to come soon!

I don’t think it’s a big deal. If you are able to swap a driver, you can file a tiny flat spot. It seems most drivers need some cleaning/fitting anyhow.

Neale has RGB, not multicolor boards? At least i cannot see details on the phone...:(

I passed both designs to Neal. However, it's up to his team to decide which to offer for sale. You can imagine how having custom LED colours for everyone may become complicated quickly, but if you're interested, be sure to let him know! Alternatively, you can make your own as well from the OSHpark files posted. Cheers

loneoceans, the GB driver still has a sense resistor that adds significant resistance to turbo, right?
Also, is the schematic available anywhere?

Also I have same question for months and doesn’t received any clear answer it will “lume 1” will be OSHW licensed or only will be open source firmware?

The schematic and source files will be up on my github and webpage as soon as I get them together. The production driver has a sense resistor that adds resistance to Turbo. Based on some prototypes I've built in real-world usage, the total actual resistance in the power path including wire resistance, contact resistance, battery internal resistance, and other parasitics, the total resistance that the Lume1 driver provides to the LED is just a few mR higher in best case scenarios compared to the stock driver, or sometimes matches it.

The FET used in the Lume1 driver has a higher voltage gate drive as well for lower R_ds_on. This means that for the roughly ~30-ish seconds the driver is in turbo, the maximum brightness is either almost the same as the stock driver in most use cases, or slightly lower when used with a very high discharge, warm cell (e.g. VTC5A or 20S), with spring bypasses. So overall, yes the sense resistor does add some resistance in general; its up to you to decide if it's an acceptable trade-off between the added features, or not.

Hello all,

Thanks so much for your patience! The Lume1 driver timeline was delayed a little more than I was hoping due to shipping delays across the world due to the current situation. However, I'm glad to say that thanks to Neal and his team at Nealgadgets, they were able to produce the first few factory prototype Lume1 drivers for production. I just received them in the mail.

In the following pictures, I'm comparing them with my copper FW3C and Lume1 driver.

Both flashlights with Lume1 driver, with my build on the left, and the prototype directly from Nealsgadgets. We have here the standard FW3A with XPL-HI LEDs.

Neal also provided the RGB AUX LED board. The tri-LED board provides so many options that it may be difficult for Neal to customize individually... but I'm not sure yet. If you're interested, do drop a message to Neal about it.

In this prototype build, I'm please to say that all functions checks out Ok!

As we know, R+G+B = white

And here's how the RGB AUX LED board looks like. Neal originally populated the RGB resistors to be too low a value and they were extremely bright! I have revised the resistor values for Neal to take note of in future builds.

And here's the raw Lume1 driver from Neal.

Overall I was pretty happy with how the functionality turned out - all functions were verified, and it's pretty cool to see the FW3A with a factory-made Lume1 driver!

There were some issues in the prototype that I need to sort out, though most of them are cosmetic. For example, while electrically the PCB is good, I wasn't pleased with the overall finish of the PCB soldermask, HASL, and silkscreen. Likewise, there were some component swaps that Neal's team made to reduce BOM cost, the most obvious is the sense resistor (confusingly a slightly higher value was used). I'm in the process of discussing these with Neal so hopefully we can get an excellent product to everyone. I'm suggesting to Neal to have a matte black soldermask with ENIG gold finish, or at least the same as the stock driver (purple with ENIG) - if you have other opinions please drop a message to Neal as well.

At the moment, I'm not exactly sure what Neal's plans are but it appears he plans to release the Lume1 driver in some special edition FW3 flashlights first, and then proceed with a driver sale. I've communicated to Neal about the community's interest in individual driver sales, especially to those who signed up on the original GB list!

Thanks and stay safe everyone!

Looking good :D. I do hope he makes the aux boards available also

Cannot wait to use my FWshelfqueens again… Thanks for the effort!

Please don’t make black soldermask on PCB driver board. Any other color different from standart green will be fine. If you need to trace track on PCB for repair black traces are difficult to see. Original purple colour or red will be good choise. For AUX board I think black will be fine.

Pretty keen for both of these. I’ll obviously need to do some reading as to setting up custom Anduril builds (eg. 65% FET + RGB), but looking very nice.

Is gloss white an option? Black is good, purple is fine, green seems not ‘special’ enough… but really I’ll accept any color as long as it has the right components.

Aux board though should definitely be white or black IMO

This modification is beautiful! Like having a smaller Emisar D4S. I wish I had the equipment & time to do this, but life is in a bit of a mess right now (preparing for a move). But I’m hopeful this will eventually make it to production lights as an option!

Thanks for the information. I’m surprised to read that. The resistor is still 20 mΩ? Would a different FET bring noteworthy improvements?

Honestly I’m not sure. Performance is critical, especially in the voltage range that I use the most (3.9-4.1V) with low Vf emitters.
At the same time aux LEDs are a must. So I didn’t buy any FW* light yet. Lume1 makes me think a lot about whether to get one.
Overall I have mixed feelings and considering it’s quite expensive light I think I’ll pass for now. But I’ll keep looking at it because even though it doesn’t exactly match my needs for secondary light I still consider it to one of the finest drivers ever made available. Thank you for that loneoceans!

And I’m looking forward to see it being available in other formats - my Skilhunt H03 has been waiting for a couple of years for a good driver. I almost bought a driver from tamagotchi at some point but UI just didn’t cut it.

Field test - I went for a long bike adventure and I used the FW3A with the factory Lume1 driver as my main bike headlight.

https://www.aliexpress.com/item/4000741932429.html?spm=a2g0o.productlist.0.0.559a6b53k0UCgw

I used a bike computer mount with integrated flashlight holder like the one above.

For the test, ran the light at various brightness for about 6 hours through the night across a variety of terrain. Not anywhere close to a scientific test by any means, but the flashlight held up with no issues, and I wanted to test the durability of the driver in high vibration conditions. I was happy with how the flashlight performed. Obviously though, the beam pattern is far from ideal as a bike light since a tighter hotspot would be better suited for the purpose (a triple Carclo is a little too floody for this), but that wasn't what I was testing for. As a side note, I've used the Convoy S2+ which works better, as well as the Sofirn SP31 which is a little better as a bike headlamp.

Neal has agreed to look into improving the PCB quality of the Lume1 driver, so I hope this will be in final production soon. Thanks!

Perfect!

Thx for update.

I think to use FW3A with same mount on my bike helmet. I think it is perfect for that of use with flood light and low weight.