I like the two knobs UI, it can be as simple as the single knob but it's more versatile. However, those can be annoying when you forget to turn the power knob the right way. A possible solution would be a led with different colors for each power level, that should avoid nearly all mistakes.
On a side note, my UI Design professor gave the microwaves as an example of a frequently bad UI. He had a theory for this: that customers also preferred more features. As in, when buying a microwaves, it could be tempting to choose one with 10~15 over one with 2 or 3.
That was just a theory, though - no studies whatsoever involved. I have never shopped for domestic appliances myself, so I don't know what I'd be tempted to buy.
Comments
I like the two knobs UI, it can be as simple as the single knob but it's more versatile. However, those can be annoying when you forget to turn the power knob the right way. A possible solution would be a led with different colors for each power level, that should avoid nearly all mistakes.
On a side note, my UI Design professor gave the microwaves as an example of a frequently bad UI. He had a theory for this: that customers also preferred more features. As in, when buying a microwaves, it could be tempting to choose one with 10~15 over one with 2 or 3.
That was just a theory, though - no studies whatsoever involved. I have never shopped for domestic appliances myself, so I don't know what I'd be tempted to buy.