Small led watch, with 3 working modes:

• POV clock
  (More about this read at https://en.wikipedia.org/wiki/Persistence_of_vision)
• Binary clock
  (https://en.wikipedia.org/wiki/Binary_clock . i have simple version here, without seconds, first row represents hours and second and third - minutes.
• Flashlight
  All leds ON, so u can use it like small flashlight =)

Made 2 versions of watch case, but don't like both of them, will remake it soon.
I wanted to make it compatible with CLASP watchband (witch i remade slightly), but finally, when i printed it out, i didn't like it at all (perhaps it could be better in PLA or some more flexible plastic then ABS))
Debug circuitry on breadboard. Then I did the board layout, but during the installation accidentally have damaged the controller. There was no time to redo, so all pictures videos ​​with breadboard =( .
See instructions for Price summary and other info.
Feel free to ask anything else =)

Work is still in progress, wait for updates soon!

All u need to make it:
1 x AVR Atmega 8 ~ 4$
12 x LEDs ~ 3$
10 x 4k7-10k resistor ~ 0.1$
12 x 680R resistor ~ 0.1$
2 x 15pF capacitor ~ 0.01$
1 x 100nF capacitor ~ 0.001$ lol
3 x micro switches ~ 1.5$
1 x small Copper Clad Board ~ 2$
1 x COMS 3V CR2032 battery ~ 1.5$
so.. about 10-15$ for everithing..

U can download PCB layout it in lay6 format, Sprint-Layout 6 program can open it.
There is also a brain.HEX file - u should use it to install firmware on the AVR controller =) U can make it with Atmel AVR JTAGICE development tool or so..

Instructions
Use button 1 to enter setup mode ad switch to the next row (hours->ten min->one min).
Button 2 will increment data in selected row.
Button 3 exit the setup and switches modes POV -> Binary clock.

To use Flashlight u need to push button 1 and button 3 together.

After 15 seconds all leds goes OFF, to save battery life. Press button 2 to wake up.