esp32-nixie-clock

A smart nixie clock capable of automatically setting time and adjusting for timezones / summer time transitions.

Features

Smart

• Time is set automatically through a web API
• A webapp is provided to adjust wifi settings, timezone, backlights and display sleeping times

The wifi settings are managed by esp32-wifi-manager.

A modern dispay driver

• SPI based driver
• No multiplexing of nixies
• No relying on old nixie drivers

Each pin is fully driven by its individual 300V NPN transistor.

A robust high voltage converter

• A modern flyback converter with top of the line controller
• No 555, no old 34063 trickery

The nixie clock is powered by a LT3757 controller and a big 1:10 transformer. The design can be found here. The last thing you need is for your clock to catch fire!

Repository structure

• bom: Bill of Materials for the PCBs
• nixie_clock_code: An esp-idf project to compile and flash on an ESP32
• pcb: PCB source files and renders for the clock
• pictures: A placeholder for the pictures you are seeing in this readme file
• schematics: Electronics schematics for the clock

Photos

Clock in its environment

The clock face PCB

The logic board PCB