For an average person it looks just like a bunch of lights, but you will be able to tell the time by just a quick glance at this clock. It might take you a couple of days to get up to speed on the esoteric art of fast binary counting, but you'll be able to tell the time right away, just a bit slower in the beginning.
Here's a instructable of counting in binary Binary counting.
Step 1: What you need
- One Atmel Tiny2313 microcontroller
- One 0.1 uF capacitor
- Eleven resistors - 120 ohm
- Eleven high brightness leds. I used 6 white and 5 yellow
- One 10 MHz crystal
- Two 20 pF capacitors
- One small pushbutton
- Eleven glass marbles
- A nice piece of wood to mount it all on
Step 2: Preparing the base
I started by drilling eleven 5 mm holes straight through for the leds. On the top I then used a 12 mm drill and drilled down like 7 mm at each 5 mm hole to get an indentation for the marbles to be put into. On the bottom I used an even wider drill and drilled out a huge chunk of wood over each led hole and then I chiseled a trench between the holes so the cables can be put there.
In the middle between the hour- and minute-leds I drilled and chiseled out a huge crater to put the electronics into.
After sanding it a bit and painted it all with a dark brown color.
Step 3: Soldering the leds & resistors
Solder the 120 ohm resistors on the long leads.
Solder a wire long enough to reach the middle of the clock to each resistor.