CH32V003 Matchbox Clock

Clock in matchbox size with touch control

(The CH32V003 is a new chip, if you prefer the Arduino Mini version, see https://www.thingiverse.com/thing:6302260)

Binary clock, it has 16 pieces WS2812B arranged in a 4x4 matrix display showing binary coded time.

Touching the top, the CH32V003 gets a wake up interrupt from a TTP223 touch sensor, wakes from sleep, reads the RTC chip PCF8563 and displays the time on WS2812 chain. Waits 2 sec, turns off the WS2812 supply and goes back to sleep mode to save the battery. In this mode, the consumption is about 20 uA, it means that the battery is good for 30000 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 (purple) 8 binary weight. To read the time, you add the weights vertically.

Display: The matrix of 16 WS2812B LEDs in series is available on Aliexpress. Connect 3 wires, Gnd, Vcc, DI data. The 470uF