As an engineer, I want to devise a power supply unit for a smart pillow that adjusts its firmness and temperature for the best sleep experience.
Acceptance Criteria
[ ] The power supply must provide a stable voltage and current that is suitable for the pillow's actuators and heating elements.
[ ] The power supply should have over-current and over-temperature protection to prevent damage to the pillow or harm to the user.
[ ] It must be able to operate on standard household power outlets (100-240V AC).
[ ] The design should be energy-efficient, preferably meeting at least Energy Star efficiency standards.
[ ] The power supply must be compact to integrate seamlessly with the pillow design.
[ ] It should include a means for easy disconnection, allowing for the pillow to be safely washable.
[ ] The power supply should have an LED indicator showing power status.
[ ] It should be compliant with international safety standards such as UL or CE.
sequenceDiagram
participant Smart Pillow
participant Power Supply
participant User
Power Supply->>Smart Pillow: Provide Power
Smart Pillow->>User: Adjust Firmness and Temperature
User->>Smart Pillow: Inputs Preferences
alt Safety Check
Power Supply->>Power Supply: Check Current and Temperature
Power Supply-xSmart Pillow: Cut off Power
end
Power Supply for Smart Pillow
As an engineer, I want to devise a power supply unit for a smart pillow that adjusts its firmness and temperature for the best sleep experience.
Acceptance Criteria