In the case of making a phone call, the HCI is the phone's touchscreen.
Or for another example, for the UX of making an online bank transfer:
you need a computer
you need an operating system
you need a web browser
you need a banking website
you need to have an internet connection
you need to have an account
you need to be able to log in and transfer money
you need to be able to log out.
Each of these items is designed each one has its own error messages or fail states that need to inform the user of what's wrong (no OS, no browser, no internet service, no website, no account, etc).
In the case of making an online banking transfer, the HCI are your computer keyboard and mouse.
Does that make sense? UX encompasses all designed parts of an experience, HCI is concerned with the interfaces between humans and computers, usually in a physical sense (hardware) even more so than how you use the hardware (software, UI)
Tommy Hodgins
CSS & Element Queries
HCI is the technology, UX is the technique.
If the UX of making a phone call includes:
In the case of making a phone call, the HCI is the phone's touchscreen.
Or for another example, for the UX of making an online bank transfer:
Each of these items is designed each one has its own error messages or fail states that need to inform the user of what's wrong (no OS, no browser, no internet service, no website, no account, etc).
In the case of making an online banking transfer, the HCI are your computer keyboard and mouse.
Does that make sense? UX encompasses all designed parts of an experience, HCI is concerned with the interfaces between humans and computers, usually in a physical sense (hardware) even more so than how you use the hardware (software, UI)