Old alarm clocks are fine if you don't like having your phone by your bedside, but it seems like they only have two options for the lights — on or off. Sometimes, you don't want that pesky glow, which is why Instructables user ShakeTheFuture made a clock you can blow on to see the time.
The basic idea here is pretty simple: The clock only lights up when you blow on it. This way, you can sleep in the dark and only check the time when you really need to. The whole thing looks easy to make using chibitronics, but head over to Instructables for the full guide.
Sound activated Light for the Clock [Instructables]