1 files changed, 152 insertions, 0 deletions
diff --git a/Electronic_Circuits_by_M._H._Tooley/Chapter12_2.ipynb b/Electronic_Circuits_by_M._H._Tooley/Chapter12_2.ipynb
new file mode 100644
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+++ b/Electronic_Circuits_by_M._H._Tooley/Chapter12_2.ipynb
@@ -0,0 +1,152 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:99e910301f8d94e773f6d9f81e6e674a29d03eeb4decca35ea0a1abf9f727037"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter12-The 555 timer"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex1-pg220"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:12.1\n",
+      "import math\n",
+      "C=100.*10**-9;\n",
+      "t_on=10.*10**-3;\n",
+      "R=(t_on/(1.1*C))/1000.;\n",
+      "print'%s %.2f %s'%(\"R= \",R,\" kohm\");"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "R=  90.91  kohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex2-pg220"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:12.2\n",
+      "import math\n",
+      "C=100.*10**-6;\n",
+      "t_on=60.;\n",
+      "R=(t_on/(1.1*C))/1000.;\n",
+      "print'%s %.2f %s'%(\"R= \",R,\" kohm\");"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "R=  545.45  kohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex3-pg223"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:12.3\n",
+      "import math\n",
+      "##R1=R2=R\n",
+      "prf=10.;\n",
+      "C=1.*10**-6;\n",
+      "R=0.48/(prf*C);\n",
+      "print'%s %.2f %s'%(\"R= \",R,\" ohm\");"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "R=  48000.00  ohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Ex4-pg223"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "##Ex:12.4\n",
+      "import math\n",
+      "prf=50.;\n",
+      "C=100*10**-9;\n",
+      "R=0.72/(prf*C);##in ohms\n",
+      "print'%s %.2f %s'%(\"R= \",R/1000,\" kohm\");"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "R=  144.00  kohm\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file