[WIP] 22mm DD+single-7135 driver / single sided / Dual-PWM / Zener

Great work. In my short time here i really came to love the stuff you do.

The 7135 is for high efficiency in the lower modes - right?
Does this make for significant gains in 2+S Zener lights, since we are burning 50-100mW all the time trough Zenner and 200R?

Sweet! This should work in a F13, DD XM-L2 and cut the trace and get 7135 powering some red locator leds :bigsmile:

They look really neat! :slight_smile:

Itā€™s cool having multiple variants of Wights boards, I got 3 different ones today and they all look so professional. :bigsmile:

Now to put em to workā€¦

Just want you to know that this driver, loaded with ToyKeepers A6 firmware, works beautifully in a BTU Shocker with 3 XP-L V5 1A emitters. I rearranged the cell carrier to run in parallel and bypassed springs, used my last 2 of djozzā€™s phosphor bronze springs for the main contact points, and it does 4095 lumens OTF.

Pretty intense strobe in the hidden loop. :wink:

Thanks again Alex, nicely done! Perfect fit for the BTU Shocker.

Built a second version of this driver tonight. Zener modified with an extra 10uF cap on the Zener, itā€™s running 12.6V from 3 series LG HE-2 cells to 3 of the 9V MT-G2 emitters. OTF lumens is 8742. And this one getā€™s hot after about 60 seconds!

The beam profile is a fat hot spot with nice spill, putting a whopping amount of nice creamy white light out. And these MT-G2ā€™s look really good in the big tri-reflector as well! :slight_smile:

Iā€™ve got the Toshiba dual sided MOSFET with a nice coil of copper soldered to the top side, Iā€™m thinking this oneā€™s pulling in the 15-18A range, but havenā€™t measured it yet. Judging from the heat flowing into the massive head on this light, itā€™s definitely making some power.

Thanks Alex! :bigsmile:

I think we need some photos of this driver built. :wink:

Essentially simple when youā€™re not using the kitchen sink stuffā€¦

This one was in the BTU Shocker with triple XP-L emitters in parallel, hence the triple 18ga wires at each LED terminal. I replaced it with a Zener modified version to run 9V MT-G2 emitters.

Thanks for the photo!

Looks pretty sweet. Need to get some of these ordered in the next couple of weeks.

I just ordered some to use in a Roche LS01. Hopefully theyā€™ll trim down to 21mm just fine.

I was initially thrown off by all the extra resistor pads; it didnā€™t cross my mind that they didnā€™t all need to be populated.

Those extra pads are the kitchen sink spoken of earlier. For thermal and such. I donā€™t really understand that aspect of it, but as a normal driver it works just fine. Maybe Iā€™ll figure out just what the kitchen sink has to do with lighting and implement some good ā€œcleanā€ fun. :stuck_out_tongue:

Has anyone used the pulldown resistor for the OTC? What resistor-value range are we talking about? My cap is taking too long to drain.

I remember seeing a discussion about it somewhere, but now I canā€™t find it.

Does this look right? I canā€™t get it to work properly, no matter what firmware I use it gets stuck on turbo. Iā€™ve used a zener and replaced the diode with a 200ohm resistor.
Iā€™m using it for a MT-G2 build.

Stuck on turbo? as if it is going DD and bypassing the driver?

As in, I can cycle through modes but when I get into turbo I canā€™t get out

wow. Thatā€™s very strange. My gut tells me it has to be something with the firmware, but youā€™ve already tried different ones so Iā€™m stumped. Hopefully somebody else can chime in.

Think Iā€™ll try another firmware tonight. Does C1 need to move?

Managed to get this working in a Nitecore MT40 :slight_smile:
Still not 100% happy with the firmware but Iā€™m always adjusting the modes anyway.

Any trick to get it working? Did you move the C1 cap? I'm about to convert one to a zener.

I'm surprised there hasn't been more posts on this driver - seems awesome. I'm gonna try a zener mod version to go in a Roche LS01 w/XHP-70.

Nope just left the board with the same layout as above the trick seems to be getting the firmware right.

Without the zener (went into a SupFire F3-L2 with BLF-A6 firmware):