4 layers28 × 28 mm

Boards in 1 GitHub repository, designed in KiCad, that use the F0502-B-15-15T-R by XFCN (-25℃~+85℃ 0.3mm 0.5mm 1.5mm 15P Bottom Contact Hinged Lid Surface Mount, Right Angle SMD,P=0.5mm,卧贴 FFC, FPC (Flat Flexible) Connector Assemblies ROHS). See how each wires it, with its parts, size, README and files; the F0502-B-15-15T-R’s symbol, footprint and pinout are on its own page.
