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. 
[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.
That’s 5,000+ lumens bumped to 8,866 lumens. 
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?
They never went out of stock. I still have some and have a lot more on the way.
I found it by searching, but it had nothing under the SST-40 section in the LED menu.
It’s under led…
Any idea when you might have 30Q and Aspire cells?
30Q...in a week or so. Aspire? Who knows. I placed another order right after we received the last one weeks ago...they seem to take a while to ship. My guess is another week or so.
That C8 host with the SST40 is a really nice light Richard, it really grows on you and I normally don’t like CW’s but this CW seems softer I think it doesn’t seem as hard on my eyes, neutral tints will be very nice in this emitter.
Has anyone tried the Nichia 319AT D440’s 5000K on a Mt. quad in the D4 yet.?
I’m wondering if it will all fit together under the Carclo without any modding or if anyone knows of some unforeseen situations with the D4 and this LED.