3 ms·
Its not quite turnkey, but USB PD (maybe with PPS, which lets the device specify voltage and current directly instead of simply picking a profile) from a known
by telgareith 2y ago
Its not quite turnkey, but USB PD (maybe with PPS, which lets the device specify voltage and current directly instead of simply picking a profile) from a known good manufacturer, and a trigger board (crapshoot there unfortunately) covers 99% of stuff.
Also, You can buy SMPS modules on mouser or digikey now for under $10. Or if you're lucky jameco will have it.
Sometimes even rotten chinese garbage can be useful- I have a portable USB supply for my DSLR that was originaly powered by seriously unsafe means- but the battery drm/sensor fakeout is good, so I just used the 9v USB-PD profile and a linear regulator.
Canon makes one, I seem to recall it was AC only, produced whine in the audio capture in video mode, and was nearly $100.