11-09-2019, 11:52 PM
(11-09-2019, 01:08 PM)zaius Wrote:They come in a dozens of different combinations of inner and outer diameter making it rare that two devices will share the same connector, voltage and amperage. You can say they're widely available but they're also largely incompatible. You end up having to get some calipers out and ordering something online each time a wall wart fails. The wall warts are also generally bulky and of questionable quality/efficiency.(11-09-2019, 08:16 AM)geokon Wrote: I'm likely not aware of some design considerations here, but I assume the next iteration of the device would just skip the barrel jack entirely? It's a very bizarre design that requires either a special wall wart or a esoteric USB to barrel cable.
Barrel jacks for power are very common. So are 5V/3A DC wall warts with barrel plugs.
https://en.wikipedia.org/wiki/Coaxial_power_connector
It's simple, economical, mature technology, and parts are widely available.
The only advantage over a proprietary connector is that there is less price gouging (well unless it's something completely wacky like a barrel jack to USB-A cable)
Everything has pretty much standardized on the USB-C connector for power now. At 5V especially.. it's a non-brainer . Everyone has a USB-A 5V charger and most of the time you don't even need a wall wart b/c you have USB jacks available at airports, TVs, power banks, etc.
Barrel jacks are more useless than VGA connectors
