This is a Nixie Tube watch!
It is powered by an Artemis module from Sparkfun. The cool part about the module is that it integrates an Apollo 3 uController that is capable of super low power ML processing, an integrated BLE antenna, RF shield, and a few other integrated parts.
I included an PDM microphone so that I can speak to the watch and have it perform functions, such as set the time, or activate a front mounted super bright LED.
Other features include:
BQ40Z80 battery fuel gauge IC
FTDI231x IC to program over USB
Numerous LED's for status.
180V power supply
Way too much battery (24+hours always on)
3D printed enclosure
The boards were designed by me, made by JLCPCB with all the extra bells and whistle options they offer, and then assembled by me using a stencil, solder paste, tweezers and a toaster oven. Lastly, the code is written in the Arduino platform and uploaded through the USB connection