Built a second version of this driver tonight. Zener modified with an extra 10uF cap on the Zener, it’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 get’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-G2’s look really good in the big tri-reflector as well!
I’ve got the Toshiba dual sided MOSFET with a nice coil of copper soldered to the top side, I’m thinking this one’s pulling in the 15-18A range, but haven’t measured it yet. Judging from the heat flowing into the massive head on this light, it’s definitely making some power.
Essentially simple when you’re not using the kitchen sink stuff…
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.
Those extra pads are the kitchen sink spoken of earlier. For thermal and such. I don’t really understand that aspect of it, but as a normal driver it works just fine. Maybe I’ll figure out just what the kitchen sink has to do with lighting and implement some good “clean” fun.
Does this look right? I can’t get it to work properly, no matter what firmware I use it gets stuck on turbo. I’ve used a zener and replaced the diode with a 200ohm resistor.
I’m using it for a MT-G2 build.
wow. That’s very strange. My gut tells me it has to be something with the firmware, but you’ve already tried different ones so I’m stumped. Hopefully somebody else can chime in.
Yes - think that was the original one on the parts list? Anyway it would work fine, accept not the best for high amps with triple LED's in parallel for example. I use the SIR800DP pretty much all the time now though. Probably no noticeable difference for single LED applications.