Make an Alarm Sound That Lights up Whenever You Want
Old alarm clocks are fine if you don’t like keeping your phone by the bed, but they only seem to have two options to turn the lights on or off. Sometimes you don’t need that pesky glow, so Instructables user ShakeTheFuture made a clock that you can blow on to find out 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 check the time only when you really need to. All this is quite simple to do using chibitronics , but for the complete guide go to Instructables.
Sound activated Clock Light | Instructables