4 layers90 × 155 mm

Boards in 1 GitHub repository, designed in KiCad, that use the LM1971M by Texas Instruments (Automatic mute/no-noise switch、Digital programmable gain SOIC-8 Audio Amplifiers ROHS). See how each wires it, with its parts, size, README and files; the LM1971M’s symbol, footprint and pinout are on its own page.
