You can solder small leads on the pads, you just need patience, and a fine solder iron tip. I mean really fine. Best you hold the leads down with some scotch tape while you solder them on. And watch out to put no force on the leads, or they could lift the whole pad.
I doubt we will see widspread use of NTC’s until we move to a more modern MCU with more pins. Like the 1616 or 1617. When we move to those, then lots of doors open.
Also, we are out of space on the tiny25 for anything else anyways, so it sure won’t be added to that.
a NTC could be added to one of the programming pads for sure if vias gets added or drilled
adding a ground pad for it as well should be no problem next to the inductor
So let’s say we build a XHP35 triple in a S2+ shorty using these drivers. 6A at 12V gives us… 3x 2A per XHP35 so that would be 3x 2200 lumens for around 6600 lumens. Not too shabby
What I’m really looking forward to is efficiency on the medium modes combined with a good UI. A quad 9050 219C can do around 800 led lumen at 6W, if the driver is efficient enough I think something like 600 lumen OTF for 2 hours should be easily doable with a single 18650. That combined with bistro and the option of doing 30W bursts on any battery level, all in a very compact light, would be amazing.
Do we have any estimate for how efficient it will be at around 10W ?
Only interested in this design too. Loneoceans did release his stuff, but to my knowledge no one other than him actually built one. Now he ain’t here no more.