2 layers139.7 × 100.3 mm

Achterart
CounterPillow/achterart
An 8-way USB-to-UART converter board based on the CH348 chip
63 parts2
Boards in 2 GitHub repositories, designed in KiCad, that use the ATS080BSM-1E by CTS Electronic Components (-40℃~+85℃ 18pF 60Ω 8MHz ±30ppm ±50ppm HC-49S-SMD Crystals ROHS). See how each wires it, with its parts, size, README and files; the ATS080BSM-1E’s symbol, footprint and pinout are on its own page.