[ENDED] Group Buy: 46mm BLF SRK 7135 V2 - 32x 7135 Drivers - No Drama!

Commercial Sellers' Spot
1

Group Buy: 46mm BLF SRK 7135 V2 - 32x 7135 Drivers

No Drama!

STAR Momentary Interface

i. What is the group buy for?

The awesome 46mm BLF SRK 7135 V2 driver. This driver was originally laid out by BLF forum member Mattaus and was later tweaked and upgraded by me. It is a great driver for those who are looking for a regulated drop-in replacement for their soup can-style lights by providing a good regulated current bump over most stock drivers, along with adding fast-PWM, low moonlight, and a better mode spread.

A bit more about the driver:

  • 46mm with tabs that can be filed down for a tight fit in almost any soup can/SRK-style light
    • What lights does this fit in? Basically, if your "soupcan" light uses four cells in parallel with a driver diameter between 43mm and 47mm you can make this driver work. The tabs and outside ground ring can be sanded quite a bit if needed to provide a tight fit. A few examples below:
      • Skyray King and almost all Skyray King clones
      • Supfire M6
      • [Please post if you have another light and I will add it to this list]
  • 2mm PCB thickness (fits better in most soup can lights than 1.6mm PCBs)
  • 32x 380mA 7135 chips
  • Approximately 12.1A CC output
  • Input Voltage:
    • 1S (4.2V): This is how almost all soup can lights are configured from the factory: with 4x18650 in parallel and 3x up to 9x emitters in parallel. If all of your batteries face the same direction then your light is 1S.
    • 2S (8.4V): Generally, 2S+ is only used in modified lights that are running 2S2P on the input to 6V emitters like the MT-G2, XHP50, XHP70, etc. This driver has an LDO option and LVP for 2S+, but you will have to convert your light. This conversion is usually fairly involved and not recommended for beginners.
  • Separate 1x7135 channel for extra low and efficient moonlight
  • Available with two different mode group options, both utilizing STAR momentary firmware:
    • SRK Special: 7 well spaced modes with a great moonlight level
    • Simple w/ moonlight: 3 modes with a great moonlight level
    • Simple without moonlight: 3 modes without a moonlight level

ii. Why "No Drama"?

The reason I am calling this a "no drama" group buy is because there will be no negotiation with the manufacturer, no test samples, no waiting for months for it to be finalized, and most important---no unexpected changes in the product, pricing, or quality. In this case, Mountain Electronics is the manufacturer, seller, and shipper. All required components are already on-hand and ready to go.

iii. Timing, Terms, and Pricing

Timing

  • The group buy opens February 3, and will close on Friday, February 12.
  • Drivers will begin shipping immediately after the group buy closes, and all drivers will be shipped within 5 days afterwards.

Terms

Pricing

    • 1 driver: $14.75
    • 2 drivers: $14.25 per driver
    • 3-5 drivers: $13.95 per driver
    • 6+ drivers: $13.65 per driver
      • These prices do not include shipping. Shipping cost will be determined based on actual package weight. Each driver weighs about 0.5 ounces.
iv. Participant List
To get on the group buy list, please post with how many drivers you are interested in.
Here is a list of the group buy slots along with each forum member's username:
1. Tom E.*
2. Bc412*
3. CRX*
4. emarkd*
5. tru3s1lv3r*
6. hank*
7. Jensa41 #1*
8. Jensa41 #2*
9. The Miller #1*
10. The Miller #2*
11. The Miller #3*
12. Beachlogger*
13. kommessy*
14. Flashpilot*
15. Tarvos*
16. KawiBoy1428 #1*
17. KawiBoy1428 #2*
18. peaceandmelons #1*
19. peaceandmelons #2*
20. kronological*
21 Thenitgoesboam #1*
22. Thenitgoesboam #2*
23. DB Custom #1*
24. DB Custom #2*
25. carmantl #1*
26. carmantl #2*
27. SawMaster #1*
28. SawMaster #2*
29. OldLumens #1*
30. OldLumens #2*
31. brightlights*
32. troisanh*
33. leroycp*
34. M78*
35. JohnnyMac*
36. Bribo*
37. Paul R*
38. mattlward*
39. slimkango #1*
40. slimkango #2*
41. Frankie Baby*
42. ReAvenger #1*
43. ReAvenger #2*
44. Shan6oob*
45. MaleNurse #1*
46. MaleNurse #2*
47. vamper*
48.
49.
50.
2

Sign me up, qty 1 please .

This is a drama free zone!

3

I like the driver, but is there still a SRK available that is of decent quality?

4

Put me down for 1

5

One for me.

6

I’d like to know this too. Can anybody make a recommendation? Link if possible!

7

Well the SupFire M6 Richard sells is bout the best SRK. I got a FandyFire and another clone needing some upgrading, so not a problem for me. I'm not interested in finding/buying any others, mainly because of exactly these unknown quality problems out there.

8

Oh, I was unaware that the Supfire M6 was a SRK clone. I thought it was a different style light.

9

The M6 is a beast, for an SRK that is. It is one chunky monkey, and has a beauty of a driver retaining ring, so no glue needed to secure down the driver. Easy to mod, SS bezel, excellent pill top/shelf for mounting LED's on copper MCPCB's, etc...

I got one I did a ways back and it does like 5000 lumens w/UCLp lens, FET driver..

10

So, are you saying that this SRK driver board will fit in the M6?

11

May be a silly question, but e-switch or mechanical clicky? Also what’s the voltage input range?

Either way put me down for one. Just trying to understand what I’m buying. Thanks Richard.

12

I'd say it is an upgraded version of the SRK, better in almost every way.

... The timing on this group buy is painful. I've spent waaaaaay too much on flashlights and parts in the last month.... But I'd really like to upgrade a quad, or maybe that M170.... Hmm. I'll have to think more on it.

13

A SRK style light uses an electronic side switch and four 18650 cells in Parallel, meaning 4.2 volt max. 7135 drivers are linear, meaning input and output voltage is the same.

I can attest to the fact that these are great drivers, if you want to make a 3x led SRK into a very bright light with about 4 amps to each led.

14

I don’t doubt your information, but when I looked at this GB, I also wanted to know the max input voltage, went to the store and found another driver with a very similar name that stated among its features:

  • Low-voltage protection for 1S, 2S, 3S, or 4S cell configurations -
    Input voltage must closely match output voltage; this is NOT a buck or boost driver

Richard, can you clarify?

15

Sign me up for one please.

But, is there any way I can get just a “little” bit of drama? I mean, just a twinge of drama would make this deal absolutely perfect!

16

I think you two are saying the same thing. If you feed it with 3s 18650 you need to have a series triple on the output. That’s what I thought and I think you two have confirmed it. Thanks guys.

So another question, which is better: 3s cells and noctigon or 3p cells and noctigon?

17

An SRK has the batteries in parallel, 4.2v max. This driver can also be zener modded though, meaning it is still linear, but can be used in other custom projects to use 2S or 3S batteries to power 6v led’s or other emitters in Serial.

18

This version actually has an LDO option on the battery side so it can be used with 2S configurations as well, with very low parasitic drain. I don't recommend using this with any 3S setups. I just updated the OP with this information.

@OldLumens: Justin, it is good to see you here! I missed having you around. I'm subbed to your YouTube channel and still watch all of your uploads.

19

E-switch. 1S or 2S, but hardly any stock soupcan lights use 2S (actually, none that I'm aware of).

20

Is this the same driver in the SRK you sell, or an option for including in it?
I’d like this in that, count me as yes for one driver.
http://www.mtnelectronics.com/index.php?route=product/product&product_id=250