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What is wrong? the
Conceptual Model: - Designer put a switch on the left side to turn on the appliance - Users prefer to turn on by a volume knob. |
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| In a radio set usually the volume
control knob is used to turn on, but on this old style radio the On/Off
switch is on the left side. The On/Off switch is not even on frontal panel but almost hidden on a lateral panel. This causes 3 problems: First problem: you have to search for On/Off switch. Second problem: when you turn on, if someone have left the volume set up on max, the loud music can hurt your ears. Third problem: to turn off you have to continue press the On/Off switch for 2 seconds |
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Suggestions | |
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| Using a single knob with integrated On/Off and Volume | ||
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| In this radio receiver, there is a more intuitive Volume Knob and Switch | ||
  Rocker switch Volume knob |
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| https://www.sparkfun.com/search/results?term=knob | ||
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