You can set the adaptor to sync mode with ./nlmidi02 -SYNC (note the CAPS) so that sync mode remains when the adaptor is removed. You should then be able to use it with any USB-MIDI host.
However, in most cases, that will be a PC. USB with its host/client architecture is a PC technology.Of course you can sync it to an other device through the PC. I haven't tried sync yet, but I could for example play mGB with a USB-MIDI keyboard attached to the PC.
What I was trying to do is let nanoloop receive midi clock from lsdj (that modified lsdj version by trash80s). But when I just connect my midi/usb cable on the nano midi adapter, nanoloop goes crazy on the sync screen, running the steps randomly.
If there is some demand, I can try to make a real MIDI-adaptor with the same functionality as the USB version.
I believe that would be highly appreciated by the community, once a lot of people don't know or don't have the patience for building an arduinoboy.