From a05acbe0fadf1389b12d9e90c47855546263d524 Mon Sep 17 00:00:00 2001
From: jonnew <jpnewman@mit.edu>
Date: Fri, 21 Dec 2018 12:14:04 -0500
Subject: [PATCH] Fixed swapped resistor values on Howland circuit

- 9k and 10k resistors where swapped on the Howland current source
porition of the estim circuit on headstage-256 and headstage-64
- Also, I added an optional 1/10 Vcoax path to one of the analog inputs
on headstage-256 to allow the host to monitor supply voltage over long
cables.
---
 headstage-64.brd            |  32 ++++++++++++++++----------------
 headstage-64.sch            |   4 ++--
 headstage-64_schematic.pdf  | Bin 130 -> 130 bytes
 headstage-64_via-reduce.brd |   4 ++--
 headstage-64_via-reduce.sch |   4 ++--
 5 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/headstage-64.brd b/headstage-64.brd
index 84089a8..c61e7b5 100644
--- a/headstage-64.brd
+++ b/headstage-64.brd
@@ -9,13 +9,13 @@
 </settings>
 <grid distance="0.1" unitdist="mm" unit="mm" style="lines" multiple="1" display="yes" altdistance="0.1" altunitdist="mm" altunit="mm"/>
 <layers>
-<layer number="1" name="Top" color="4" fill="1" visible="yes" active="yes"/>
-<layer number="2" name="GND1" color="13" fill="1" visible="yes" active="yes"/>
-<layer number="3" name="Route2/PWR" color="11" fill="9" visible="yes" active="yes"/>
-<layer number="4" name="GND2" color="1" fill="4" visible="yes" active="yes"/>
-<layer number="5" name="Route3" color="41" fill="1" visible="yes" active="yes"/>
-<layer number="6" name="GND3" color="1" fill="8" visible="yes" active="yes"/>
-<layer number="7" name="AGND/PWR" color="4" fill="8" visible="yes" active="yes"/>
+<layer number="1" name="Top" color="4" fill="1" visible="no" active="yes"/>
+<layer number="2" name="GND1" color="13" fill="1" visible="no" active="yes"/>
+<layer number="3" name="Route2/PWR" color="11" fill="9" visible="no" active="yes"/>
+<layer number="4" name="GND2" color="1" fill="4" visible="no" active="yes"/>
+<layer number="5" name="Route3" color="41" fill="1" visible="no" active="yes"/>
+<layer number="6" name="GND3" color="1" fill="8" visible="no" active="yes"/>
+<layer number="7" name="AGND/PWR" color="4" fill="8" visible="no" active="yes"/>
 <layer number="8" name="Route8" color="1" fill="2" visible="no" active="no"/>
 <layer number="9" name="Route9" color="4" fill="2" visible="no" active="no"/>
 <layer number="10" name="Route10" color="1" fill="7" visible="no" active="no"/>
@@ -25,11 +25,11 @@
 <layer number="14" name="Route14" color="1" fill="6" visible="no" active="no"/>
 <layer number="15" name="Route15" color="4" fill="6" visible="no" active="no"/>
 <layer number="16" name="Bottom" color="1" fill="1" visible="yes" active="yes"/>
-<layer number="17" name="Pads" color="2" fill="1" visible="yes" active="yes"/>
-<layer number="18" name="Vias" color="10" fill="1" visible="yes" active="yes"/>
-<layer number="19" name="Unrouted" color="14" fill="1" visible="yes" active="yes"/>
-<layer number="20" name="Dimension" color="15" fill="1" visible="yes" active="yes"/>
-<layer number="21" name="tPlace" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="17" name="Pads" color="2" fill="1" visible="no" active="yes"/>
+<layer number="18" name="Vias" color="10" fill="1" visible="no" active="yes"/>
+<layer number="19" name="Unrouted" color="14" fill="1" visible="no" active="yes"/>
+<layer number="20" name="Dimension" color="15" fill="1" visible="no" active="yes"/>
+<layer number="21" name="tPlace" color="7" fill="1" visible="no" active="yes"/>
 <layer number="22" name="bPlace" color="7" fill="1" visible="yes" active="yes"/>
 <layer number="23" name="tOrigins" color="15" fill="1" visible="no" active="yes"/>
 <layer number="24" name="bOrigins" color="15" fill="1" visible="no" active="yes"/>
@@ -37,7 +37,7 @@
 <layer number="26" name="bNames" color="7" fill="1" visible="no" active="yes"/>
 <layer number="27" name="tValues" color="7" fill="1" visible="no" active="yes"/>
 <layer number="28" name="bValues" color="7" fill="1" visible="no" active="yes"/>
-<layer number="29" name="tStop" color="7" fill="3" visible="yes" active="yes"/>
+<layer number="29" name="tStop" color="7" fill="3" visible="no" active="yes"/>
 <layer number="30" name="bStop" color="7" fill="6" visible="yes" active="yes"/>
 <layer number="31" name="tCream" color="7" fill="4" visible="no" active="yes"/>
 <layer number="32" name="bCream" color="7" fill="5" visible="no" active="yes"/>
@@ -47,7 +47,7 @@
 <layer number="36" name="bGlue" color="7" fill="5" visible="no" active="yes"/>
 <layer number="37" name="tTest" color="7" fill="1" visible="no" active="yes"/>
 <layer number="38" name="bTest" color="7" fill="1" visible="no" active="yes"/>
-<layer number="39" name="tKeepout" color="4" fill="11" visible="yes" active="yes"/>
+<layer number="39" name="tKeepout" color="4" fill="11" visible="no" active="yes"/>
 <layer number="40" name="bKeepout" color="1" fill="11" visible="no" active="yes"/>
 <layer number="41" name="tRestrict" color="4" fill="10" visible="no" active="yes"/>
 <layer number="42" name="bRestrict" color="1" fill="10" visible="no" active="yes"/>
@@ -1985,8 +1985,8 @@ einem neuen Namen ab.</description>
 <element name="U1" library="jonnew" package="CP_16_27-L" value="ADA4062-4ACPZ-R7" x="-3.49" y="5.22" rot="MR0"/>
 <element name="R4" library="jonnew" package="0201T" value="10k, 0.1%" x="0.64" y="3.51" rot="MR0"/>
 <element name="R5" library="jonnew" package="0201T" value="10k, 0.1%" x="-1.34" y="6.58" rot="MR0"/>
-<element name="R1" library="jonnew" package="0201T" value="10k, 0.1%" x="-1.34" y="5.72" rot="MR90"/>
-<element name="R11" library="jonnew" package="0201T" value="9k, 0.1%" x="-3.89" y="7.52" rot="MR0"/>
+<element name="R1" library="jonnew" package="0201T" value="9k, 0.1%" x="-1.34" y="5.72" rot="MR90"/>
+<element name="R11" library="jonnew" package="0201T" value="10k, 0.1%" x="-3.89" y="7.52" rot="MR0"/>
 <element name="R2" library="jonnew" package="0201T" value="1k, 0.1%" x="-1.44" y="3.8" rot="MR180"/>
 <element name="R12" library="jonnew" package="0201T" value="100" x="-3.89" y="8.08" rot="MR180"/>
 <element name="R8" library="jonnew" package="0201T" value="10k, 0.1%" x="-5.86" y="4.532" rot="MR180"/>
diff --git a/headstage-64.sch b/headstage-64.sch
index 2d6fbda..0fd8f29 100644
--- a/headstage-64.sch
+++ b/headstage-64.sch
@@ -6812,8 +6812,8 @@ Source: amp_227161.pdf</description>
 <part name="U1" library="jonnew" deviceset="QUAD-OPAMP_14PIN" device="_CP_16_27_L" value="ADA4062-4ACPZ-R7"/>
 <part name="R4" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
 <part name="R5" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
-<part name="R1" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
-<part name="R11" library="jonnew" deviceset="R" device="_0201T" value="9k, 0.1%"/>
+<part name="R1" library="jonnew" deviceset="R" device="_0201T" value="9k, 0.1%"/>
+<part name="R11" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
 <part name="R2" library="jonnew" deviceset="R" device="_0201T" value="1k, 0.1%"/>
 <part name="R12" library="jonnew" deviceset="R" device="_0201T" value="100"/>
 <part name="R8" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
diff --git a/headstage-64_schematic.pdf b/headstage-64_schematic.pdf
index f4bb9b91e394be7c390a8b91caefc30b784382f3..6faa751594e1979227c502d6c125c134d7405313 100644
GIT binary patch
delta 83
zcmWN{yAgmO3;@uxWeP`tB;>P$O9T?{tnDnBz>)RUZ*6OP`S9x5vl>mLfT>fg0g8@v
f3Ok`U#p+BbG4xN?B5YJp=~IHK+}D%45et_O!$}rH

delta 83
zcmV~$yAgmO3;@uxWeP{g4@h=!i3Gx(wVfpsII{2UV;^6;nk{4OBGoO3c&0}mqJfrG
ekts7Z7&=Z};?Q$7TsYJx0XUWCe)BYLVC4tDrxua`

diff --git a/headstage-64_via-reduce.brd b/headstage-64_via-reduce.brd
index 3c71aca..22838cb 100644
--- a/headstage-64_via-reduce.brd
+++ b/headstage-64_via-reduce.brd
@@ -1985,8 +1985,8 @@ einem neuen Namen ab.</description>
 <element name="U1" library="jonnew" package="CP_16_27-L" value="ADA4062-4ACPZ-R7" x="-3.49" y="5.22" rot="MR0"/>
 <element name="R4" library="jonnew" package="0201T" value="10k, 0.1%" x="0.64" y="3.51" rot="MR0"/>
 <element name="R5" library="jonnew" package="0201T" value="10k, 0.1%" x="-1.34" y="6.58" rot="MR0"/>
-<element name="R1" library="jonnew" package="0201T" value="10k, 0.1%" x="-1.34" y="5.72" rot="MR90"/>
-<element name="R11" library="jonnew" package="0201T" value="9k, 0.1%" x="-3.89" y="7.52" rot="MR0"/>
+<element name="R1" library="jonnew" package="0201T" value="9k, 0.1%" x="-1.34" y="5.72" rot="MR90"/>
+<element name="R11" library="jonnew" package="0201T" value="10k, 0.1%" x="-3.89" y="7.52" rot="MR0"/>
 <element name="R2" library="jonnew" package="0201T" value="1k, 0.1%" x="-1.44" y="3.8" rot="MR180"/>
 <element name="R12" library="jonnew" package="0201T" value="100" x="-3.89" y="8.08" rot="MR180"/>
 <element name="R8" library="jonnew" package="0201T" value="10k, 0.1%" x="-5.86" y="4.532" rot="MR180"/>
diff --git a/headstage-64_via-reduce.sch b/headstage-64_via-reduce.sch
index 2d6fbda..0fd8f29 100644
--- a/headstage-64_via-reduce.sch
+++ b/headstage-64_via-reduce.sch
@@ -6812,8 +6812,8 @@ Source: amp_227161.pdf</description>
 <part name="U1" library="jonnew" deviceset="QUAD-OPAMP_14PIN" device="_CP_16_27_L" value="ADA4062-4ACPZ-R7"/>
 <part name="R4" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
 <part name="R5" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
-<part name="R1" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
-<part name="R11" library="jonnew" deviceset="R" device="_0201T" value="9k, 0.1%"/>
+<part name="R1" library="jonnew" deviceset="R" device="_0201T" value="9k, 0.1%"/>
+<part name="R11" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>
 <part name="R2" library="jonnew" deviceset="R" device="_0201T" value="1k, 0.1%"/>
 <part name="R12" library="jonnew" deviceset="R" device="_0201T" value="100"/>
 <part name="R8" library="jonnew" deviceset="R" device="_0201T" value="10k, 0.1%"/>