Small 244 KB PDF schematic for the USB board of the Stanford project, also tagged ZHXS, marked as a RAMP release. The name does not state the brand or model.

Mainboard schematic from the Stanford (ZHXS) project, labelled RAMP, a 1.23 MB PDF. No brand, model or board number is given in the name, so check the title block inside…

LED board schematic from the Stanford (ZHXS) project, RAMP release, in a 342 KB PDF. The name gives no brand or model, only the project codename.