Technical components for the flashlight

Flashlight Modding and DIY Parts
1

Hello everyone!
I want to make a small batch of flashlights almost from scratch (not for commercial use /not for sale) with the parameters I need:

  1. Buck-boost is a driver that I can connect through some device, for example, to my computer and adjust to the brightness modes I need (50 lm, 300 lm, 600 lm, 1200 lm, strobe light by quickly double-clicking on a button). I need the Buck-boost driver because I need the brightness to be constant and not decrease all the time the battery is running.
  2. The required shape, width, length and depth of the reflector are compatible with the CULPM1.TG or SFT40, so that in the end there are 80,000 candelas at the maximum brightness mode (1200 lumens).
  3. A device (if there is one) that I can connect to my computer to configure the driver to the modes I need.
  4. Powered by a 21700 5000 mAh battery.

I understand the topic of flashlights relatively superficially, so I need the help of the participants of this forum. I apologize if I wrote in the wrong topic, and also apologize for my incompetence.
Please don’t throw stones at me.

2

Thanks for joining the party, dzrpp!

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3

Welcome to BLF dzrpp

Here are 18 matches for the LEDs and Battery you mention.

Suggest you find out which of those offer a Boost Driver option… and consider whether their built in modes could suit your needs.

If off the shelf drivers are not suitable, it may be possible to obtain a custom Anduril hex file configured to produce the outputs you want.

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4

Thank you very much, but unfortunately these options are not suitable. In addition, I do not want to buy ready-made options, but to make my lanterns from component parts. I will also order the manufacture of the case according to the drawings provided by me.

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5

I was about to put an extensive reply here, but let’s “get back to basics” and start with:
What are your skills and what can you contribute to this flashlight?!?

For now it seems like that you:

  1. Want BLF to design a driver that meet your needs…
  2. Want BLF to find a reflector that is compatible with the LED’s you prefer… (without specifying what you expect from those LED’s)
  3. Refers back to nr. 1 in that you want a software interface developed that comunicates with a computer…
  4. A body/host that provides room for a 21700…

And you don’t want (as you stated) “ready-made options”… and “the manufacture of the case according to the drawings provided by me”…

So, again, what are you able to design/develop yourself? For now it seems like you wan’t BLF to design a “custom flashlight” for you, which you can then let it be produced for you…

6

Hello!

  1. No, I don’t need to develop a new driver. I just want to find out from the local guys if there is even a driver that I need (buck-boost with the ability to configure modes via any device).
  2. I believe that rather such a reflector will also need to be made to order according to the drawings provided by me. I definitely may have difficulties with drawing up such a drawing, so I think I could pay a person who is able to draw up such a drawing or help me with this.
  3. I find it difficult to answer, honestly, because I am not completely familiar with this topic.
  4. Yes, the body and the design of the lantern will also be made according to drawings, this also refers to my point 2.
7

You could probably get b/b drivers from Convoy, Sofirn, Wurkkos, as they sell individual parts, maybe do the same for a reflector that uses the CSI.NY or whatever LED in a production light (assuming you like the beam), but the firmware on the driver is likely to be already cooked in, and made to interface with the production light it’s from.

So, let’s say you get a b/b driver from a FC13 (no idea if that’s what it uses), and order the separate driver. You’ll get a driver meant for a FC13. So depending on whether you want a tailswitch, sideswitch, dual-switch, etc., you’ll have to pick a light that has what you want if you want to use that driver, else you’ll have to learn how to program a replacement µC, write the UI, cook it into the IC, then unsolder/resolder the chip onto the board.

Or just get an ancient 7135-based driver.

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8

Hi!
But the 7135 is a linear driver. If I understand correctly, then to maintain a constant brightness level (for example, 300 lumens) during the entire life of the battery, I need to use the Boost driver. Maybe you know the most suitable Boost driver models for this purpose, probably with the possibility of programming them in some way?

9

Not sure if this is going in the direction you are looking for, but to some of your questions:

You could start by looking at the lume1 driver, created by @loneoceans.

Here’s a datasheet: click
Here’s more information: click

You’ll be lucky to find a pre-built lume1 driver for sale anywhere these days, so you’d probably have to have to put it together yourself:

  • Here’s where you can obtain the driver board: click
  • Here’s the list of components: click

The driver is programmable via flashing pads on the underside of the board. You can use Hank Wang’s flashing kit with your computer or an Android phone to flash/re-flash the firmware. This can be purchased here: click.

However, take note of the need to swap around the MOSI and MISO pins - see “Flashing Firmware” here: click

The lume1 driver is supported by Anduril 2 firmware. Anduril 2 is open source, so with sufficient programming skill, you can re-configure it or modify it to achieve the modes you are looking for.

The code repository for Anduril 2 is here: click

The lume1 is designed physically to fit in an 18650 FW3A host with a tail-switch. However, since you are designing your host from scratch, you may be able to design it in such a way that a 21700 can be used. Otherwise you may need to change the design of the lume1 board to fit the different dimensions.

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