websnik / callisto

A desk clock that uses a Russian IV-18 VFD tube

Callisto

Callisto is a digital clock that uses a Russian IV-18 vacuum fluorescent tube for the display. The clock uses an ESP32 to automatically sync time.

The name Callisto was chosen so that the name could be displed on an 8-digit seven-segment display.

Features:

• Sync time, retrieved using WiFi
• Automatically switch to daylight saving time
• Clock display settings configured using web browser
• Automatic shutoff during night hours in order to decrease energy usage and extend tube life
• Auto-dimming based on ambient light conditions

Special thanks

The software and hardware design of the clock was stolen from heavily inspired by the following projects:

• Ice Tube Clock by Lady Ada
• Flora-ESP8266 by mcer12