Mod: My latest retarded super bright light ( <15000 LUMEN of NW tint mixed light and 200+ kcd)

I find these FETs in the drill packs at the recycle bins. Check the amp draw and the low drain-source resistance

Total gate charge = 160nC, unable to be driven directly by an attiny13. Gate charge has to be around 40 or less. This is the problem with ultra-high performance FETs, if they can do huge current at low resistance, they can't be driven directly without adding other parts, like high-power gate drivers. FETs that are easy to drive have lower performance. There isn't anything out there that has a better balance between those two things than the Vishay 70N02, not by a long shot.

The gate load presented by two FETs in parallel could also be an issue with RaceR86's driver not working correctly (though there are other things to check first, reverting to a single FET for testing wouldn't be a bad idea).

Who was that that had a pic of a driver, East-092 style, that had a stack of FET's a mile high? Dunno if it actually worked -- I just recall that picture in my head. Think it was someone who really knew their stuff in EE though...

Holy MOG! You crazy off the charts Norseman. I guess it's true what they say about intelligence and insanity.

P.S. How are the emitter's wired? It appears 2S6P.

Oh my gosh!!! That light is sick! I am so jealous now………………………

Wow that is insane.
I have pmed with other guys here about these light and a similiar mod….but a direct drive with XML2s…wow

I think a second FET is good at this currents because even if resistance is low the power loss is huge at huge currents and 30A is mega high current, you should solder GND wire also direct on the FET because I wouldn’t trust the copper paths with this currents…I also think that one FET without heatsink can smoke away…
The power over a resistor rise with current power 2……P=I^2*R
So 0.0033×30^2=3W loss in one FET…if you use two 0.75W loss per FET.

The 70N02 is from the specs definitely a very good one, sadly it’s not available anymore for cheap

I have no fettin idea what you guys are talking about here on several fronts. The electrics for a start but it works and amazingly well at that. The giggling school girl also lost me. Mine only grumps.

? Tell me more. Howto and why?

Ive just been using first post of your BLF17 thread as reference for how to put these drivers together.

Yeah. Back when I did my 7K+ (never measured, just assumed) tint mixed 9 XM-L light I had to rely on 3x Sony 50A cells in order to get the amps high.

Would only get up towards 7500mAh.

With this light. I can use 6x NCR18650BD (3200mAh) and get close to 19200mAh and still have insane performance.

No doubt these flooder throws. Although, It has to be said for those (not you Tom E) who just read the numbers and are not familiar with such lights. Its not a thrower compared to a thrower. Meaning, due to all the flood light, lots of moisture, dust, etc thats in the air gets lit up. The ground in front of you also gets lit up a lot. These things makes it harder to see light far into the distance. No doubt, its extremely impressive. But its still a flooder, just with very good range.

My 9 XM-L light was included in this beamshot comparison for those who want to get an idea of how the beam on a hot rodded multi emitter lights with some de-domed emitters look.

Yupp! :)

Three of my ground wires from the contact board goes directly to the FET (Two 22awg and one 18awg). Then I thought, why not add another one (22 awg) that goes to the driver board as well since its so easy to solder there. I don't like soldering too many thick wires to the FETs, I end up soldering wire on top of wire. Do you think its bad to have one of those wires to the board and not directly on the FET?

I also consider all those copper wires to the FETs to work as a "heatsink" to some extend.

Stunning job. Congrats!

Right on the money both of you! I love it.

Post #55: https://budgetlightforum.com/t/-/27485?page=1#comment-609956

I haven't tried it myself, but we don't think any fix is needed for the zener-modded drivers, since the original polarity protection diode gets eliminated.

Hahahahaha!

Holy f*ck. Was there any recoil when you turned it on?

There was. For a moment the sun's photons were moved back towards the sun until voltage sag allowed things to return to normal.

DAGGUM!!!

Blasting out the light…next step…WATERCOOLING :smiley:

2 minutes of glory is actually a very long time. id be happy with that type of performance with just 45 seconds every turn on.

fantastic job!

I agree though. A light that'll give that kind of output continuously is going to be big and heavy or much more complex.

I only get one mode on my last FET driver. I’m pretty sure it’s because I initially attached the Zener in reverse and cooked the MCU. Maybe your Zener is not making contact properly. Just a thought…I’m over my head here.

Nice, 15000 lumen, that is what the once amazing Foursevens Maelstrom XM18 puts out, but in a way less bulky package, I guess this mod did not cost you $2,400 dollars :-)