Allright here it is, I’m really happy with this driver, this light will probably be my new EDC for a long time-
This is specific for a foursevens Quark body running a single Li-ion. The light will be converted to a 3-up using a 20mm noctogin (relatively simple conversion, diameter is perfect, just needs a slight spacer). The noctogon is setup for individual channel LED’s (also simple, no traces need cut just dont use any jumpers) and 3 different LED’s are used, a red XP-E2, a Nichia 219 and a white XP-L. The red XP is moonlight, the N219 is the main light source and the XP-L is used for added output.
The N219 has 6x 7135’s for 2.1A (this will provide 60minutes on max from the little 2200mAh 17650), the red XP-E2 has a single 7135 (only used for moonlight) and the XP-L is direct drive from a SOT-23 “baby” FET. The FET’s source leg is NOT grounded, it is supplied from the bottom contact ring which is grounded by tightening the head against the body. With the head loose the driver will only run the red XP / N219, tighten the head and the FET starts to power the XP-L.
The red XP-E2 will only be on during moonlight (and no white will be on for that), in “turbo” [head tight] both the N219 and the white XP-L will be running. To reiterate this is more than a single “turbo” mode, with the head tight the XP-L runs along with the N219 in all white levels. Unfortunately there is no way to turn off the N219 when the head is tight with this driver, that would take a whole new UI (and even a new MCU totally) and I wanted this project to use STAR so everyone has access to the technique.
The best part is-all this happens with a standard STAR off-time build utilizing the alternate PWM output for moonlight (the N219 and the XP-L run from the same PWM output). The ONLY change to the FW is a very simple one, you change DUAL_PWM_START to DUAL_PWM_STOP and swap around a single variable (see post 973 here )
You dont have to use that specific combo of emitters either, you could do something like use a N219 for moonlight and then 2 XP-L’s (in different CCT’s if you wanted), you could use the same combo of N219 / XP-L and a different color for moonlight (amber would work great also), really there’s several ways you could use this thing.