From c39a594eb2929e50dfdef059fbc4285db743761f Mon Sep 17 00:00:00 2001
From: Jack MapelLentz <8261330+jltml@users.noreply.github.com>
Date: Mon, 23 Mar 2026 18:08:51 -0400
Subject: [PATCH 1/2] Replace broken link with archive.org link

---
 notebooks/3/Proportional-Integral-Control.ipynb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/notebooks/3/Proportional-Integral-Control.ipynb b/notebooks/3/Proportional-Integral-Control.ipynb
index 37036429..9d2c1097 100644
--- a/notebooks/3/Proportional-Integral-Control.ipynb
+++ b/notebooks/3/Proportional-Integral-Control.ipynb
@@ -86,7 +86,7 @@
     "    + \\underbrace{K_I \\int^t_0 e(t') dt'}_{\\text{integral}}\n",
     "    + \\underbrace{K_D \\frac{d}{dt}e(t)}_{\\text{derivative}}$$\n",
     "\n",
-    "The [excellent cartoon](https://www.northeastern.edu/landherr/stem-comics/science-comic-pid-controls/) explains the P, I, and D terms as different boxing styles."
+    "The [excellent cartoon](https://web.archive.org/web/20241110063726/https://www.northeastern.edu/landherr/stem-comics/science-comic-pid-controls/) explains the P, I, and D terms as different boxing styles."
    ]
   },
   {

From 4a59f92762becb994989125d7171266c88738a4f Mon Sep 17 00:00:00 2001
From: Jack MapelLentz <8261330+jltml@users.noreply.github.com>
Date: Mon, 23 Mar 2026 18:27:34 -0400
Subject: [PATCH 2/2] Fix tiny grammatical error

---
 notebooks/3/Proportional-Integral-Control.ipynb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/notebooks/3/Proportional-Integral-Control.ipynb b/notebooks/3/Proportional-Integral-Control.ipynb
index 9d2c1097..4980502d 100644
--- a/notebooks/3/Proportional-Integral-Control.ipynb
+++ b/notebooks/3/Proportional-Integral-Control.ipynb
@@ -86,7 +86,7 @@
     "    + \\underbrace{K_I \\int^t_0 e(t') dt'}_{\\text{integral}}\n",
     "    + \\underbrace{K_D \\frac{d}{dt}e(t)}_{\\text{derivative}}$$\n",
     "\n",
-    "The [excellent cartoon](https://web.archive.org/web/20241110063726/https://www.northeastern.edu/landherr/stem-comics/science-comic-pid-controls/) explains the P, I, and D terms as different boxing styles."
+    "This [excellent cartoon](https://web.archive.org/web/20241110063726/https://www.northeastern.edu/landherr/stem-comics/science-comic-pid-controls/) explains the P, I, and D terms as different boxing styles."
    ]
   },
   {