Alarm clocks aren’t mankind’s favorite invention, but they sure are useful. I bet I would like mine a bit more if I created it. Maybe there’s a way to make it a bit more useful, too.
I’ve always thought alarm clocks could be done better. It’s pretty easy to ride the snooze button in a half-awake state, losing a critical part of your morning that could have been spent making more coffee. So I set out to implement an alarm that would be sure to effectively wake me up.
I had a spare 315MHz wireless receiver
lying around, so I figured I could use that to drive the killer feature of my alarm – wirelessly turning it off.
The wireless module I’m using. It’s pretty much plug-and-play. The D0-D3 lines go high depending on which button is pressed on the wireless transmitter for this module. VT goes high whenever any D-line goes high.