The Clock That 'Clears' Your Appointments For You
Source: Pourya’s Blog » Blog Archive » Write your own clock
“Trace of time” is a different type of wall clock designed by Il-Gu-Cha. Its really a day-planner which you can use on daily basis, to visualize your day’s activities while pacing them with the corresponding time. The writeable glass surface works like a board and all appointments are written by you and wiped away by the rotating hand as it passes over.
All very well but how much is it for something you could manufacture yourself with inexpensive components?