Followed this work off-n-on through the FWxA era and always wished for easy access to your efficient designs, so major props to getting this into major production! I love a low moonlight, and the D3AA has delivered on that and more.
With obvious evolutions to follow what are your thoughts on:
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Dual channel models - couple of options, but do you have thoughts on:
a. Channel switch only - move the DAC between channels (say a headlamp with white/red, no blending needed)
b. Use PWM for a secondary channel - sigh, I’d hate to regress now…
c. 2+ DAC chips - looks like ATxmega or PICs are where they appear. Others may options?
d. Something else? -
Power saving - where is the most bang for buck savings?
a. Clock/sleep modes - looks like Toykeeper put TODOs for using the DAC in standby modes. I wonder how much power this represents? Also down-clocking in general will probably help, but I’m thinking about 2 month moonlight, heh.
b. Boost converter modes - this seems like a less plausible mod to make on existing designs, but how much do the ultrasonic modes ‘burn’ compared to lower frequency modes?
The D3AA has me thinking of a dual-fuel dream headlamp with 1xB35AM and 2xSST-20_red for a killer Anduril, dual channel headlamp (6V on each channel, but probably suitable for channel switching only).