1 files changed, 76 insertions, 53 deletions
diff --git a/hardware/analog_io.kicad_sch b/hardware/analog_io.kicad_sch
index 1320a55..f8ea502 100755..100644
--- a/hardware/analog_io.kicad_sch
+++ b/hardware/analog_io.kicad_sch
@@ -6,7 +6,7 @@
 
   (title_block
     (title "Analog signal transformation")
-    (date "2023-08-08")
+    (date "2023-08-15")
     (company "bitgloo")
     (comment 1 "Released under the CERN Open Hardware Licence Version 2 - Strongly Reciprocal")
   )
@@ -448,17 +448,14 @@
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@@ -466,6 +463,9 @@
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@@ -473,10 +473,6 @@
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@@ -745,6 +737,10 @@
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@@ -807,12 +803,8 @@
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 11759ad9-6dd7-41a3-871a-342ee2b5fb5b)
   )
-  (text "Operational amplifier options:\n - TLV9162: Good for input, low GBW for output\n - OPA1678: Good for output, low stock\n - TL972: Good balance as choice for both (12MHz)\n - MC33078D: Also a good choice for both (15MHz)\n\nInput requires GBW between 8-15MHz; output requires >14.7MHz"
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-    (effects (font (size 1.27 1.27)) (justify left bottom))
-    (uuid 1298cbaa-a693-47ae-987b-082155ee1893)
-  )
-  (text "Low-pass RC filter\nto increase drop beyond Fc" (at 154.94 48.26 0)
+  (text "Optional low-pass RC filter\nto increase attenuation beyond Fc"
+    (at 154.94 48.26 0)
     (effects (font (size 1.27 1.27)) (justify left bottom))
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@@ -829,7 +821,7 @@
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   )
-  (text "Inverting amplifier\nG = 0.5, Offset = 1V\n0-2V output for MCU"
+  (text "Inverting amplifier\nG = 0.5, Offset = VDDA/2\n0-VDDA output for MCU"
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     (effects (font (size 1.27 1.27)) (justify left bottom))
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-  (text "Low-pass RC filter\nto increase drop beyond Fc" (at 66.04 97.79 0)
+  (text "Optional low-pass RC filter\nto increase attenuation beyond Fc"
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-  (text "Low-pass RC filter\nto increase drop beyond Fc" (at 64.77 151.13 0)
+  (text "Optional low-pass RC filter\nto increase attenuation beyond Fc"
+    (at 64.77 151.13 0)
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@@ -945,22 +939,22 @@
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+  (symbol (lib_id "Device:R_US") (at 121.92 54.61 90) (unit 1)
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-    (property "Footprint" "Resistor_SMD:R_0603_1608Metric" (at 108.204 56.134 90)
+    (property "Footprint" "Resistor_SMD:R_0603_1608Metric" (at 122.174 53.594 90)
       (effects (font (size 1.27 1.27)) hide)
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-    (property "Part Number" "RT0603DRE0720KL" (at 107.95 57.15 0)
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@@ -1082,19 +1076,19 @@
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+  (symbol (lib_id "power:GND") (at 59.69 67.31 0) (unit 1)
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+    (property "Value" "GND" (at 59.69 72.39 0)
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+      (effects (font (size 1.27 1.27)) hide)
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+    (pin "2" (uuid f70bbb94-75ed-40c7-b89a-218c6d65c5b8))
+    (instances
+      (project "DSP PAW add-on board"
+        (path "/c291319b-d76e-4fda-91cc-061acff65f9f/684072e7-f538-4528-bfb8-b14c31b5b1f0"
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+        )
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+
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@@ -1495,19 +1518,19 @@
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