Is there really a new version of the DQG avaible? I have only seen V3 up to now.
I also consider the D4s too big compared to the DQG, and would have preferred a 7 LED variant. Now I have to use the DQG for my planned RGBA + 3x white build - which is way more difficult due to the serial LED setup and the driver design.
It’s probably worth noting that the li-ion cell’s self-discharge rate is faster than that, so it probably won’t actually last 20 years per charge. But if the driver and LEDs were the only source of drain, it looks like it should last a couple decades based on how low the power draw is.
Effectively, there is no difference in terms of battery life between the low aux LED mode and off.
Not every flashlight has to be “edc”-small. This looks like a fantastic light for a backpack/bag, car, maybe even jacket pocket carry for an outdoor event. I’m into it.
I have a D4 MCPCB at home. I will measure it just tell me what dimensions you need. In D4 the screw holds the MCPCB and two legs of the optics resting on the screw. So if we make like D4S and same screw holding down the aux pcb you need to cut off more from the legs on screws. Maybe you need use longer screws also.
Edit: I think less leds are also enough. like 6 or 8.
The resistors and the LDO costs in serial production less than 20 cents so why not stick it on it
Of course a sort of LVP like I am planning on my tail boards would be possible as well, but that costs like 0.6$ more
But pogo pins do need some support, they are long, thin and bendy. Which is why I suggested a 3D printed support.
Perhaps a big dollop of hot glue might suffice.
Back in the day my kit was designed for ATE on a GenRad/Teradyne bed of nails, with guided probe for detailed stuff. Everything made extremely precisely and solidly.
Not necessary for a torch. Just a common flashing interface.