HDD power on/off from PC via arduino nano

Youtube video:

1. Making hardware part: https://youtu.be/gbGgRGde1ME

2. Making software part: https://youtu.be/tIniV0m-ixA

R.Lab_HDDPower_part1_rus.pdf - device assembly, Russian language.

HddPowerCtrl.ino - Adruino source file.

QtHddPower/ - folder with Qt project for software control power.