✨ IN17 Clock

IN17 Nixie tube clock with internal DC-DC converter, random melody alarm and temperature/humidity sensor

Easy-to-find parts

The project does not use components that are difficult to buy (except for nixie tubes themselves). Even the DC-DC HV converter is driven by the Arduino itself using BJTs-based driver without third-party MOSFET drivers, and the HV transformer is wound on an old CFL choke.

Required parts:

• 4x IN-17 (ИН-17) Nixie tubes (or any other that you can find)
• 2x Neon bulbs for separator (from an old power switches)
• DS3231 RTC module
• DHT31 temperature + humidity sensor (can be replaced with different one but requires modifying code)
• 2x 74HC595 shift registers
• 1x ATmega328P (from an old Arduino UNO)
• 16MHz crystal oscillator
• Passive buzzer
• Old CFL for choke
• Any 20-90V MOSFET (for driving HV transformer). Mine is P75N02 (25V 75A)
• 19x (10 + 4 + 4 + 1) 13003 BJTs from an old CFLs (for multiplexing nixies and separator)
• A bunch of capacitors, resistors, buttons and common BJTs (BC547, BC557, etc.)

🏗️ Getting started

🚧 README in progress...