This video shows my DIY Motorized roller curtain. It is driven by a stepper motor. An Arduino Nano is used to read IR signals from an old TV remote and control the roller curtain.
EasyEDA project with schematic and PCB layout:
https://easyeda.com/Axbri/roller-curtain-controller
Arduino code:
http://brinkeby.se/downloads/MotorizedRollerBlindCodeV1.zip
3D printed STL parts:
http://brinkeby.se/downloads/MotorizedRollerBlindSTLpartsV1.zip