README.md
STM32 and USB-C Based Nixie Clock

A <![CDATA[]]>Nixie<![CDATA[]]> clock that's powered by USB-C and based on a STM32 microcontroller. Designed schematic, layout, and firmware from scratch! Fun mix of retro tech with modern electronics. Main Features:
  - Custom 5V to 180V boost converter that operates in discontinous conduction mode to power the Nixie tubes
  - USB-C Power input + bootloader
  - Push button dial that's used to set time and interface with the menu
  - Used high voltage shift registers to run the tube display
  - STM32F100 micro controller with abysmal flash storage ... because that's all that was in stock during the great covid parts shortage of 2021 when I started this project

Mostly Finished Product




Still would like to add a walnut enclosure and a nice wodden knob for the push button dial
80/20 rule in full force


Layout






4 Layer board


Schematics

5V to 180V Boost Converter



Full Schematics

<![CDATA[]]>Full Schematics here
<![CDATA[]]>

Bringup/Development




Bring up of HV shift register driver with assistance from Merlin