08. Term Project Documentation: Mattress Pad Alarm Clock [Albert Chong]

The mattress pad alarm clock is designed for college students living in dorm rooms. Bad dorm room furniture and long hours of studying often cause back problems for students. The mattress pad alarm clock will wake you gradually with a massage every morning so that your muscles are relieved from stress and prevent you from sleep inertia. Furthermore, waking up by using the sense of touch instead of sound will wake only you and not your roomate.

How Does it Work

Pager motors are placed inside panels of foam core, which are than placed beneath a mattress pad. Once the alarm sets off, the pager motors will vibrate the bed and wake up the user.

A touch sensor is placed above the mattress padding to indicate whether or not the user is on the bed. If the user does not wake up the motors will continue to vibrate; thus, the alarm only turns off when the user gets out of bed. After the user gets out of bed, if he or she decides to go back to sleep, the sensors will indicate that the user is not fully awake and this time it will set off the motors again along with a loud beep.




Mattress Pad Alarm Clock



1 Arduino diecimila board
1 bread board
1 speaker
1 16×2 lcd
6 pager motors
1 Tip 120 transistor
2 10k resistor
3 100 ohm resistor

1 diode

2 switches
1 Pressure sensor
3.3v external power

mattress pad


~ by Albert Chong on May 12, 2010.

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