From 0d86b323205171cb3a0c9da1b2c2a5126a78e8bb Mon Sep 17 00:00:00 2001
From: Brendan Haines <brendan.haines@gmail.com>
Date: Sat, 3 Aug 2024 11:07:18 -0600
Subject: [PATCH] working varistor model

---
 .vscode/extensions.json    |   5 ++
 bh.kicad_sym               | 107 +++++++++++--------------------------
 spice/generic/varistor.lib |  10 ++++
 3 files changed, 46 insertions(+), 76 deletions(-)
 create mode 100644 .vscode/extensions.json
 create mode 100644 spice/generic/varistor.lib

diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..71c10b3
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "xuanli.spice"
+    ]
+}
\ No newline at end of file
diff --git a/bh.kicad_sym b/bh.kicad_sym
index cb18e4e..7a952ba 100755
--- a/bh.kicad_sym
+++ b/bh.kicad_sym
@@ -72702,7 +72702,7 @@
 				(hide yes)
 			)
 		)
-		(property "Sim.Device" "SPICE"
+		(property "Sim.Device" "SUBCKT"
 			(at 0 0 0)
 			(effects
 				(font
@@ -72711,7 +72711,34 @@
 				(hide yes)
 			)
 		)
-		(property "Sim.Params" "model=\"A NC--1 NC--2 NC--3 NC--4 NC--5 NC--6 NC--7 NC--8 VARISTOR rclamp=${Value}\""
+		(property "Sim.Library" "common_libraries/spice/generic/varistor.lib"
+			(at 0 0 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Name" "VARISTOR"
+			(at 0 0 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=IN_N 2=IN_P 3=R_P 4=R_N"
+			(at 0 0 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Params" "gain=${VALUE}"
 			(at 0 0 0)
 			(effects
 				(font
@@ -72812,78 +72839,6 @@
 					)
 				)
 			)
-			(pin passive line
-				(at 0 -3.81 90)
-				(length 0) hide
-				(name "~"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-				(number "3"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-			)
-			(pin passive line
-				(at 0 -3.81 90)
-				(length 0) hide
-				(name "~"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-				(number "4"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-			)
-			(pin passive line
-				(at 0 -3.81 90)
-				(length 0) hide
-				(name "~"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-				(number "5"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-			)
-			(pin passive line
-				(at 0 -3.81 90)
-				(length 0) hide
-				(name "~"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-				(number "6"
-					(effects
-						(font
-							(size 1.27 1.27)
-						)
-					)
-				)
-			)
 			(pin passive line
 				(at 0 3.81 270)
 				(length 1.27)
@@ -72894,7 +72849,7 @@
 						)
 					)
 				)
-				(number "7"
+				(number "3"
 					(effects
 						(font
 							(size 1.27 1.27)
@@ -72912,7 +72867,7 @@
 						)
 					)
 				)
-				(number "8"
+				(number "4"
 					(effects
 						(font
 							(size 1.27 1.27)
diff --git a/spice/generic/varistor.lib b/spice/generic/varistor.lib
new file mode 100644
index 0000000..4b62b22
--- /dev/null
+++ b/spice/generic/varistor.lib
@@ -0,0 +1,10 @@
+*BEGIN MODEL VARISTOR
+*//////////////////////////////////////////////////////////////////////
+* (C) Brendan Haines
+*/////////////////////////////////////////////////////////////////////
+.SUBCKT VARISTOR IN_P IN_N R_P R_N PARAMS: gain=1
+*/////////////////////////////////////////////////////
+* .PARAM gain=1
+R R_P R_N {abs(V(IN_P) - V(IN_N)) * gain + 1n}
+.ENDS
+* END MODEL VARISTOR