Initial design for hatlet and hatlet-dongle

.gitignore

@@ -44,6 +44,7 @@ Cargo.lock
 *.sch-bak
 *~
 _autosave-*
+\#auto_saved_files#
 *-save.pro
 *-save.kicad_pcb
 *-cache.dcm

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "kicad-projects/libs/racklet-kicad-lib"]
 	path = kicad-projects/libs/racklet-kicad-lib
 	url = ../racklet-kicad-lib.git
+[submodule "kicad-projects/libs/kicad-pmod"]
+	path = kicad-projects/libs/kicad-pmod
+	url = git@github.com:chiplet/kicad-pmod.git

kicad-projects/hatlet-dongle/README.md

@@ -0,0 +1,26 @@
+# hatlet-dongle
+
+hatlet-dongle is a small adapter board that allows you to connect a hatlet to a development host PC without a full backplane. In essence, it is a backplane-side breakout board of the racklet backplane connector with:
+- USB type C connector for D+/D- and +5VSB power input,
+- Banana jacks for supplies
+  - +12V SBC supply
+  - +5V SBC supply
+  - +5VSB management power supply
+  - ground
+
+A pin jumper is used to select the source of the +5VSB supply between:
+- USB type C connector
+- Banana jack
+
+## Pictures
+<table>
+    <tr>
+        <th>Front</th>
+        <th>Back</th>
+    </tr>
+    <tr>
+        <td><img alt="hatlet-dongle front view" src=./pictures/hatlet-dongle-0.1.0-front-alpha.png></td>
+        <td><img alt="hatlet-dongle back view" src=./pictures/hatlet-dongle-0.1.0-back-alpha.png></td>
+    </tr>
+</table>
+

kicad-projects/hatlet-dongle/fp-lib-table

@@ -0,0 +1,4 @@
+(fp_lib_table
+  (version 7)
+  (lib (name "racklet")(type "KiCad")(uri "${KIPRJMOD}/../libs/racklet-kicad-lib/racklet.pretty")(options "")(descr ""))
+)