Clock in a bottle

Clock in a bottle

Binary clock built in a glass container Pepco / Poundland SKU 34705101.
It has 13 pieces WS2812B LEDs for displaying binary coded time.

Touching the glass top, the Arduino gets a wake up interrupt from a TTP223 touch sensor, wakes from sleep, reads the time keeping chip DS1302 and displays the time on WS2812 LED chain.
Waits 2 sec, turns off the WS2812 supply, goes back to sleep mode to save the battery.

In this mode, the consumption is about 30 uA, it means that the battery is good for about
50000 working hours (many years theoretically) with a single charge.

The color of the WS2812 is freely adjustable in the Arduino program, the default is red
for the 1, yellow for 2, green 4, blue 8 binary weight. To read the time, you add the weights vertically.

When the charger is connected, the display stays always on.

Preparation: Solder 4-4-3-2 pieces WS2812B PCB-s together, all Vcc and Gnd parallel, DO to next DI. The chain of 13 LEDs is as