GFS16 - Battery Indicator Tailcap Light & 1mR FET Tailswitch! (Rev B)

mfrey · 2020-02-17T21:03:05.000Z

Fady:

Hello all, 1st I want to thank loneoceans for sharing this with us. just finished building 2 switches and they work with the H17F driver only if a bleeder resistor is added, I used 2.2Kohms and all functions flawlessly. My question to loneoceans or anyone who may know… would a lower value bleeder expedite the coin battery charging time… with the 2.2Kohms it took about 3HRs off time to charge from 2.55v to 2.67v on a full 18650 battery, Thanks.

2.2Kohms bleeder is only good for the switch board alone, for both the switch and the led board… 3x 2.2Kohms or 733ohms worked perfectly.

Forgive my ignorance but where do the bleeder resistors go on the boards? I’m similarly interested in building this switch for use with an Mtnelectronics H17F. Are they soldered in addition to the cited components or in place of some them?

moderator007 · 2020-02-17T21:32:45.000Z

The bleed resistor goes anywhere you can get battery positive to battery ground (outside driver ring) on the driver. Its a additional component that needs to be added in some drivers. Some work without a bleed resistor.
Here’s a few pics.

D.I.Y. Illuminated tailcap Flashlight Modding and DIY Parts

I’ll start by saying that while sometimes I’ll sell a light with one of these pre-installed, I am not currently taking orders for them. If someone else offers to build one for you, go for it. I won’t attempt to restrict it in any way, though I try to make it as accessible as possible for people to build their own. This is still a project in motion, often being updated/upgraded. So if you have an idea to make it even better, please let us know. Below is a brief overview. I recommend reading thr…

JS93 · 2020-04-08T17:03:24.000Z

Hi all,

I’m having a bit of trouble ordering the boards from OSH Park. Im using the tailcap switch and LED board in an S2+ Triple but I cant see how I change the board thickness from 0.8mm to 1.6mm?
Is this necesary when using this system in an S2+ host?

gchart · 2020-04-08T17:33:57.000Z

During the checkout process you select the “service” you want: 1.6mm standard 1oz, 0.8mm 2oz, after dark, medium run, or rush order. Just pick the standard 1.6mm 1oz service.

JS93 · 2020-04-08T17:35:37.000Z

Awesome, thanks gchart. Cant wait to make a start on this!

JS93 · 2020-04-10T17:20:10.000Z

Would anyone be able to suggest an alternative Super Barrier rectifier to the one suggested (SBRT05U20S3)?
I am having trouble tracking on down on digikey.

Thanks

gchart · 2020-04-10T17:52:57.000Z

JS93:

Would anyone be able to suggest an alternative Super Barrier rectifier to the one suggested (SBRT05U20S3)?
I am having trouble tracking on down on digikey.

Thanks

I don’t think the particular diode is critical as long as it’s the SOD-323 footprint. The BAT54 is pretty common and cheap.

BlueSwordM · 2022-03-25T16:19:43.000Z

Anyway, that reminds me.

I still have a lot of these, and since I’m getting some new soldering equipment pretty soon, I could make some very low resistance switches

I do have the issue of the components being a bit problematic to source however.

BlueSwordM · 2022-03-25T16:39:26.000Z

@gchart, do you know where to get supercaps? I can find all other components still available obviously, but not the supercap.

BlueSwordM · 2022-03-25T16:45:26.000Z

I found it!

Digi-Key Electronics

XH414HG-IV01E | Digi-Key Electronics

Order today, ships today. XH414HG-IV01E – 80 mF (EDLC) Supercapacitor 3.3 V Coin, Wide and Corner Terminals from Seiko Instruments. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

That means I can still build it

It’s also cheaper than when I looked last time, which is surprising.

Hoop · 2022-03-25T21:08:27.000Z

The super capacitor will provide ~20 uAh to 2 volts so it will likely keep the board functional for a few hours. Then what happens? The light may no longer be operational for a while after that.

BlueSwordM · 2022-03-25T21:35:22.000Z

@hoop, I’m building the GFS16 without the LED board, so once the supercap is fully charged, it’ll stay charged for a long time.

DarkShot · 2022-03-25T22:30:05.000Z

@BlueSwordM color me interested, I’d be down for a couple if you make some, missed out the last time you offered to do some up.

BlueSwordM · 2022-03-25T23:33:39.000Z

@darkshot, no problem.

Now that I have a competent soldering iron again, I’ll finally be able to do some stuff

JS93 · 2022-03-29T04:18:22.000Z

@BlueSwordM, Id also be interested in buying a few if you make them. Is it possible to makethem with the LED board also?

BlueSwordM · 2022-03-29T04:22:10.000Z

@JS93, not with the current boards I have.
I only have the low resistance switches.

I’ll first buy the components for the 10x switches I have, and fulfill the “reserve” list first, and then sell the rest.

If everything goes well, I’ll just order 100x for components and do a small GB for components, and completed switches

BlueSwordM · 2022-03-31T00:00:22.000Z

So, I’ll order the components after my exams.

If I can build one well enough, I’ll start making them myself and then shipping them.

If not, I’ll just sell the components directly to you, my friends

BlueSwordM · 2022-04-01T00:33:42.000Z

1. Darkshot

2. Darkshot

3. Inkidu

4. Shirnask

5. TomE

6. TomE

7. Kawiboy1428

8. Kawiboy1428

9. MRsDNF

10. MRsDNF

11. Inkidu

Is this list still valid?

shirnask · 2022-03-31T18:04:58.000Z

still in

BlueSwordM · 2022-03-31T19:52:38.000Z

Nice, not everybody is dead it seems.

I now have 2 slots left since I don’t really care too much about these switches anymore.