There a new standard called USB Programmable Power Supply which allows devices to specify exactly what voltage they desire in 10mV increments. I have started getting adapters for all my electronics (e.g. label printer) so I can standardise on one kind of power supply. Most things use one of the normal voltages (5/9/12/15/20) so USB PD will often suffice, however not all USB PD chargers support all the voltages. I have a Delta Electronics USB PD charger that does not do 12V.
> Most things use one of the normal voltages (5/9/12/15/20) so USB PD will often suffice, however not all USB PD chargers support all the voltages. I have a Delta Electronics USB PD charger that does not do 12V.
The issue there is that PD 1.0 was 5/12/20 and then 2.0 was 5/9/15/20. So you can guarantee support for everything except 12, basically.
Making 12v optional is not one of their better decisions.
I’ve been thinking about getting such adapter cables, but I got a little bit of a sour note after searching desperately for a 24v one, only to find out that’s not part of the spec…
