Layout: Get started on PCB layout

Hardware/KiCad/DIY_Router.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 0,
+    "active_layer": 2,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
@@ -53,7 +53,7 @@
       "board_outline_area",
       "ly_points"
     ],
-    "visible_layers": "ffffffff_ffffffff_fffffff7_ffffffff",
+    "visible_layers": "ffffffff_ffffffff_fffffff5_ffffffff",
     "zone_display_mode": 0
   },
   "git": {

Hardware/KiCad/DIY_Router.kicad_pro

@@ -69,7 +69,13 @@
           "thermal_relief_spoke_width": 0.5
         }
       },
-      "diff_pair_dimensions": [],
+      "diff_pair_dimensions": [
+        {
+          "gap": 0.0,
+          "via_gap": 0.0,
+          "width": 0.0
+        }
+      ],
       "drc_exclusions": [],
       "meta": {
         "version": 2
@@ -203,7 +209,11 @@
           "td_width_to_size_filter_ratio": 0.9
         }
       ],
-      "track_widths": [],
+      "track_widths": [
+        0.0,
+        0.254,
+        0.508
+      ],
       "tuning_pattern_settings": {
         "diff_pair_defaults": {
           "corner_radius_percentage": 80,
@@ -230,7 +240,12 @@
           "spacing": 0.6
         }
       },
-      "via_dimensions": [],
+      "via_dimensions": [
+        {
+          "diameter": 0.0,
+          "drill": 0.0
+        }
+      ],
       "zones_allow_external_fillets": false
     },
     "ipc2581": {
@@ -668,7 +683,7 @@
         "uuid": "e7060ada-4117-4611-abe2-1a97a47c74c4"
       }
     ],
-    "used_designators": "J1,U6,SW1-4,TP2-7,R19,R23-25,#PWR1,#PWR55,#PWR68-70,#PWR74,#PWR79,D2",
+    "used_designators": "#PWR1,#PWR70,#PWR80-81,R2",
     "variants": []
   },
   "sheets": [