Quantity   Component name
1 × Arduino UNO As controller
1 × Grove - Base Shield To connect grove modules to an Arudino
1 × Grove - OLED To display the time
1 × Grove - Button I/O device
1 × Grove - Ultrasonic Ranger To detect if some guy sit in the front of your monitor
1 × 8mm Acrylic board Make the stand
1 × Some screws and nuts Assembly