nailed is a one pixel camera on your nail.
it carries an IC with 16Kb of flash memory to save input from a color sensor and play it back on the RGB LED

prior at https://yair.cc/nld/

ATtiny1634

SK6812

some info on the data pins and protocol of ws2812

he main difference between the two drivers is that the SK6812 has voltage-independent color and brightness over a wide voltage range, which means that the colors of the LEDs should not be affected by a drop in the supply voltage as much as they are on the WS2812B.source
SK6812 SK6812SIDE SK6812MINI
datasheet datasheet

TCS3414

pdf, guide arduino

pintout >

VEML6040

24LC32AFT

32-Kbit I2C Serial EEPROM, pdf

24LC16BT

as space on the nail is at premium we will currently use thin wires to power each nail.

Schema