MTN Electronics: LEDs - Batteries - Lights - Chargers - Hosts - Drivers - Components - 1-Stop-US Source

The website says to put one switch wire to ground.

The other switch wire goes to a pre tinned pad next to pin 2. Do you see a pad next to a P2 label? He might be referring to pin 2 of the mcu.

The mcu is the 8 legged chip.

I can see some pads next to the leg at the 3:30 position.

I don’t see any pads on the other drivers in that location. You might have to wait for someone who has actually used these drivers. I haven’t. Lol

I found it.

One wire goes to pin2 on the MCU. The MCU is the rightmost large structure on the board in the picture in the previous post. Pin 2 is second from the left in the bottom row. The other wire can connect to anywhere on the outer ring or to any contact pad that has a direct connection to the outer ring.

If it uses the same layout as the original D4 driver, the e-switch should probably go on the pads for the OTC. And you can probably reduce standby power by removing R1 or R2 so that nothing will be connected to pin 7.

I’d have to double check the layout to be sure, but IIRC that’s what the D4 code expects.

He bought non D4 drivers with the D4 software on them.

The driver shipped with those 2 resistors not installed (the 2 resistors in the left side of the picture above).

Okay, nice. The missing resistors are a feature, not a bug. :slight_smile:

I don’t know if RMM re-compiled it to use pin 3 for the switch, but the original build used pin 2. It’s easy enough to test though; connect LEDs and power, and ground one pin or the other to see if it responds.

I find it very difficult to get a wire to stick to the tiny pads on pin 3, but the OTC pads are bigger and easier… and the OTC isn’t used by the D4 code so it doesn’t really need to be there. I’ve never tried having a capacitor on the switch pin, but RMM says it works fine.

With those changes the driver will, of course, not be usable for older firmwares which require an OTC or voltage divider. But it sounds like that will be okay.

Remind me, what does OTC stand for?

OTC = offtime capacitor, used for measuring time while power is disconnected, on lights with a power switch instead of e-switch.

It’s required for bistro and blf-a6 and a few others, but has been far less common in newer firmwares because it uses up a pin and is prone to heat-related variation and is no longer required to detect short vs long button presses. (still required for short/med/long though, except in the case of bistro-HD, which requires very specific other hardware)

Also, totally unrelated… oops. I waited too long to order 30Q cells… again. I suppose I should still order without them though, unless they’re expected to come back in stock soon.

Solder the switch wires on the OTC.

Leaving OTC on the board does nothing to affect power drain. Once it charges, it is charged and does not act like a short circuit.

Ordered a few weeks ago---probably arriving this week or next week.

I solder the switch lead directly to the MCU pin, very rare for me to reflash an MCU after the light is built. I’ve seen times when it was pin 3, times when it was pin 2, so that get’s confusing to me but a pair of tweezers to “toggle” the switch off either 2 or 3 tells the story pretty quick. :wink: [4 is ground, easy to touch tweezers to 2 and 4 or 3 and 4 to act as the switch, just a touch of course, like clicking the e-switch… unless it’s a ramping firmware then hold for ramp]

Some pictures with arrows pointing to the solder pads for the E’switch might be really helpful.

Richard, any chance you’ll be stocking any more high (I think the highest available is 80?) CRI XM-L2? I’m in need of several.

Also, I see the page on the website for the SST-40, just no stock listed yet… :+1:

I was browsing around the site last night and also noticed the SST-40 page. Look forward to seeing what bins/tints you can get your hands on. I really like the SST-40s I have from somewhere else.

Any chance of stocking the Luxeon V in the future? Maybe even get some DTP boards made for it? Djozz did a test on one using an XP board and the performance and tint look really good.

Maybe some more of the 5xx series, but the rest, probably not. There are 90 CRI XM-L2 available, but the XM-L2 is starting to get long in the tooth.

The SST-40 is only available in cool white for now, but more tints will become available in the future.

I’m finding the SST-40 to rock! Gained some 3,000 lumens putting 3 of em in my SupFire M6 over the XM-L2. Sweet, I can live with the color at this point, til they come out with better ones. :wink:

That’s 5,000+ lumens bumped to 8,866 lumens. :smiley: The only thing I changed aside from emitters is that I re-flashed the MCU with TK’s ramping firmware.

I wonder what they can do in the Q8 or are the xpl’s already close to the sst-40? IDK.

SST-40 will put out more lumens than XP-L due to the lower vF. It's like the 219C but in an XM-L2 package....low vF = lotsofamps. :-)

Will you be restocking SST-40’s?