2 layers34.9 × 54.6 mm

Boards in 1 GitHub repository, designed in KiCad, that use the LM317AH by Texas Instruments (-40℃~+125℃@(Ta) 1 1.25V~37V 1.5A 40V 80dB@(120Hz) Adjustable Over Current Protection、Over Temperature Protection Positive TO-39-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS). See how each wires it, with its parts, size, README and files; the LM317AH’s symbol, footprint and pinout are on its own page.
