Link an old UPS to a QNAP NAS

I wanted to have my ancient UPS (uninterruptible power supply) to be able to shut down my NAS when the power goes out.

Mike Pijl

Quantity		Component name
1	×	Arduino Nano
1	×	Assorted connectors & bits of wire
1	×	USB cable to connect Arduino to NAS
1	×	A separate power supply for the Arduino