Silent wake up digital Alarm
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This idea comes directly from a need that I have. I often want to get up early, before my roomates do, but any "normal" alarm would wake them up as well. I looked for vibrating wristwatches, but for some reason they say it's not for waking people up. (Maybe people would hurt themselves if they rolled onto it.) And it's also hard to make vibrators that small that also has the needed electronics. So, my idea is some variation of a vibrating alarm, for those people who don't want to wake up their roomates (or spouses). There could be a normal alarm clock that sits on a desk nearby. Also, included in the product would be a wrist-band (it can be big, as long as it's comfortable, if neccessary it could be as big as a hand even, as long as it's comfortable to sleep in). At the time that a person wants to wake up, the desk alarm sends a signal to the wrist-band, that vibrates until the person either wakes and turns the desk-alarm off, or hits the snooze on the desk alarm. Ideally, the vibrating wrist-band would be as quiet as possible, but even a little noise, as long as it doesn't wake others up, would be an improvement on what's already out there.