From cee9756dd76ee4d4e4a415d2a94a686af04307f9 Mon Sep 17 00:00:00 2001
From: Stephen J Carpenter <sjc@carpanet.net>
Date: Wed, 18 Mar 2026 15:38:59 -0400
Subject: [PATCH] Bobbin Update

Broke out parameters and defined primary/secondary as json
presets.
---
 bobbin.json | 31 +++++++++++++++++++++++++++++++
 bobbin.scad | 13 +++++++++----
 2 files changed, 40 insertions(+), 4 deletions(-)
 create mode 100644 bobbin.json

diff --git a/bobbin.json b/bobbin.json
new file mode 100644
index 0000000..a7ce74a
--- /dev/null
+++ b/bobbin.json
@@ -0,0 +1,31 @@
+{
+    "fileFormatVersion": "1",
+    "parameterSets": {
+        "Secondary": {
+            "CoreGap": "0",
+            "LegDiameter": "16",
+            "LegLength": "30.399999999999999",
+            "NumberCoils": "1",
+            "ShieldDiameter": "26",
+            "ShieldThick": "2",
+            "YokeHeight": "12.140000000000001",
+            "YokeLen": "28",
+            "render_fa": "0.40000000000000002",
+            "render_fn": "0",
+            "render_fs": "0.40000000000000002"
+        },
+        "Primary": {
+            "CoreGap": "0",
+            "LegDiameter": "16",
+            "LegLength": "30.399999999999999",
+            "NumberCoils": "1",
+            "ShieldDiameter": "26",
+            "ShieldThick": "2",
+            "YokeHeight": "12.140000000000001",
+            "YokeLen": "28",
+            "render_fa": "0.40000000000000002",
+            "render_fn": "0",
+            "render_fs": "0.40000000000000002"
+        }
+    }
+}
diff --git a/bobbin.scad b/bobbin.scad
index e1b2851..089a6cd 100644
--- a/bobbin.scad
+++ b/bobbin.scad
@@ -5,12 +5,17 @@ use <BOSL/joiners.scad>
 use <./core_uy1658-60.scad>
 use <./legs.scad>
 
-/* [Options] */
+/* [Coil(s)] */
+
+ShieldDiameter=44;
+ShieldThick=.6;
+NumberCoils=10;
+
+/* [Core] */
 
 LegLength=30.40;
 LegDiameter=16;
 CoreGap=0;
-NumberCoils=10;
 YokeHeight = 12.14;
 YokeLen=28.00;
 
@@ -47,7 +52,7 @@ module bobbin_joiners(ld=LegDiameter, ll=LegLength, lb=YokeHeight, tg=CoreGap, l
 	}
 }
 
-module bobbin(ld=LegDiameter, ll=LegLength, lb=YokeHeight, tg=CoreGap, lc=.15, t=.4, sn=NumberCoils+1, st=.6, sd=50, wcd=3, orient=ORIENT_X, align=V_CENTER) {
+module bobbin(ld=LegDiameter, ll=LegLength, lb=YokeHeight, tg=CoreGap, lc=.15, t=.4, sn=NumberCoils+1, st=ShieldThick, sd=ShieldDiameter, wcd=3, orient=ORIENT_X, align=V_CENTER) {
 	bl=2*(ll-lb) + tg;
 	inner=ld+2*lc;
 	outer=inner+2;
@@ -83,7 +88,7 @@ module bobbin(ld=LegDiameter, ll=LegLength, lb=YokeHeight, tg=CoreGap, lc=.15, t
 }
 
 legx = (YokeLen + LegDiameter)/2;
-right(legx) bobbin(sn=2, sd=26.3, st=2, orient=ORIENT_XNEG);
+//right(legx) bobbin(sn=2, sd=26.3, st=2, orient=ORIENT_XNEG);
 left(legx) bobbin();
 %core(gap=0);
 //left(20+20) rotate([90,0,0]) snaps();