Added speaker with R2R DAC, mic and minor improvements

schematic.kicad_sch

@@ -5,6 +5,151 @@
   (paper "A4")
 
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@@ -516,25 +661,90 @@
         )
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@@ -881,6 +1141,109 @@
     )
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+    (property "Value" "Microphone(Must be with preamp!!!)" (at 142.24 95.1865 0)
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@@ -909,6 +1272,159 @@
     )
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@@ -963,6 +1479,31 @@
     )
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@@ -991,6 +1532,159 @@
     )
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     (instances
       (project "schematic"
         (path "/e61cadf2-d4a8-4a80-a850-59bde3b9a069"
@@ -1021,6 +1715,31 @@
     )
   )
 
+  (symbol (lib_id "power:Earth") (at 119.38 116.84 90) (unit 1)
+    (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced)
+    (uuid ec19f6be-8c6b-468c-9b17-1bf56e100a6e)
+    (property "Reference" "#PWR07" (at 125.73 116.84 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "Earth" (at 123.19 116.84 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Footprint" "" (at 119.38 116.84 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "~" (at 119.38 116.84 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (pin "1" (uuid ddd0526a-638f-4200-95d4-c8b38731c134))
+    (instances
+      (project "schematic"
+        (path "/e61cadf2-d4a8-4a80-a850-59bde3b9a069"
+          (reference "#PWR07") (unit 1)
+        )
+      )
+    )
+  )
+
   (sheet_instances
     (path "/" (page "1"))
   )