diff --git a/misc/PullUpWiderstand.kicad_sch b/misc/PullUpWiderstand.kicad_sch
new file mode 100644
index 0000000..d2e4a6e
--- /dev/null
+++ b/misc/PullUpWiderstand.kicad_sch
@@ -0,0 +1,1207 @@
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+		(lib_id "PCM_Elektuur:S-make")
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+	)
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+		)
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+					(reference "#PWR02")
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+			)
+		)
+	)
+	(symbol
+		(lib_id "PCM_SL_Resistors:Resistor")
+		(at 83.82 38.1 90)
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+			(uuid "78538a05-79fb-4d96-8092-83a2edba6db7")
+		)
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+			(project ""
+				(path "/010a0f2a-cf19-430b-ad46-7851a0b6c63a"
+					(reference "PullUpWiderstand")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(sheet_instances
+		(path "/"
+			(page "1")
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+	)
+)
diff --git a/src/01_grundlagen.ipynb b/src/01_grundlagen.ipynb
index 859275d..71b42b1 100644
--- a/src/01_grundlagen.ipynb
+++ b/src/01_grundlagen.ipynb
@@ -593,6 +593,81 @@
     "    print(\"x ist größer als 5\")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "b679354e-d020-4654-894d-38daeaa3a0c4",
+   "metadata": {
+    "editable": false,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "source": [
+    "## Pin Zustände einlesen\n",
+    "\n",
+    "Als nächstes wollen wir den Zustand von Pins einlesen und eine entsprechende Meldung ausgeben.\n",
+    "GPIO 0 ist praktischerweise mit den \"FLASH\" Knopf auf der Platine des Mikrocontrollers verbunden, sodass wir für unseren Test keine extra Schaltung aufbauen müssen.\n",
+    "Als erstes initialisieren wir den Pin als Input Pin."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "41b849d5-8693-4f31-9496-13a903a3e72c",
+   "metadata": {
+    "editable": true,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "eingabe_pin = machine.Pin(0, machine.Pin.IN, machine.Pin.PULL_UP)\n",
+    "eingabe_signal = machine.Signal(eingabe_pin, invert=True)"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "245cb3e5-46e4-4fe6-ae54-0df98b41b35f",
+   "metadata": {
+    "editable": true,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "source": [
+    "Hier übergeben wir noch einen dritten Parameter an die Pin Funktion.\n",
+    "Dieser dient dazu, die internen Pull-Up Widerstände des Mikrocontrollers für diesen Eingang zu aktivieren.\n",
+    "Neben `machine.Pin.PULL_UP` gibt es auch noch `machine.Pin.PULL_DOWN`, falls man Pull-Down Widerstände nutzen möchte.\n",
+    "Pull-Up und Pull-Down Widerstände sind dazu da, bei geöffnetem Schalter ein eindeutiges Signal an den Mikrocontroller so senden.  \n",
+    "![Pull-Down Widerstand Schaltplan](img/pull-down-resistor.png)\n",
+    "\n",
+    "Nun können wir mit der `value()` Methode es `eingabe_pin` Objekts den Wert des Pins auslesen bzw. mit der gleichen Methode des `eingabe_signals` den invertierten Eingang.\n",
+    "Wir invertieren den Pin in diesem Fall, weil der FLASH Knopf den Eingang des Mikrocontrollers mit Ground (dem Minuspol) verbindet, dadurch wird ein Aus-Signal (0) gelesen wenn der Knopf gedrückt ist.\n",
+    "Genau wie auch bei dem Umkehren der Zustände der LED ist dies auch bei dem einlesen von Pins durch ein `machine.Signal` möglich.  \n",
+    "**Wichtig:** Die nächste Zeile gibt den Zustand des Pins aus zum Zeitpunkt der Ausführung, ihr müsst den Kopf also schon vor der Ausführung drücken, falls ihr den gedrückten Zustand einlesen wollt."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bf1cd20a-a878-449b-8692-527da8ec7800",
+   "metadata": {
+    "editable": true,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "print(eingabe_signal.value())"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "f46a9e10-24ff-4d7f-a31b-3a1c5d47df61",
diff --git a/src/img/pull-down-resistor.png b/src/img/pull-down-resistor.png
new file mode 100644
index 0000000..269fc2e
Binary files /dev/null and b/src/img/pull-down-resistor.png differ