Simple nixie clock using Arduino and IN-12 Часы на ИН-12 и Arduino

Simple nixie clock using Arduino and IN-12 soviet Nixie Indicator Numerical Tubes. K155ID1 chip which is a BCD to decimal driver with high voltage open collector outputs. Fully compatible with well known 74141 IC. Optocouplers: TLP627(F) DS3231 Clock module from aliexpress.com Часы на ИН-12 и Arduino Разработчик Андрей Железняков. Ссылки на его видео и блог со схемой, печатной платой и прошивкой ниже: https://www.youtube.com/watch?v=kF-lz28mFUc&index=19&list=PL9oanB5Th2TXLQ5cNJmOMentez3jgnza7 http://itworkclub.ru/arduino-%D1%87%D0%B0%D1%81%D1%8B-%D0%BD%D0%B0-%D0%B3%D0%B0%D0%B7%D0%BE%D1%80%D0%B0%D0%B7%D1%80%D1%8F%D0%B4%D0%BD%D1%8B%D1%85-%D0%B8%D0%BD%D0%B4%D0%B8%D0%BA%D0%B0%D1%82%D0%BE%D1%80%D0%B0%D1%85/