diff --git a/dimmer.ipynb b/dimmer.ipynb
new file mode 100644
index 0000000..f2354fc
--- /dev/null
+++ b/dimmer.ipynb
@@ -0,0 +1,94 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "source": [
+    "\r\n"
+   ],
+   "metadata": {}
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "source": [
+    "from dimmer import Dimmer\r\n",
+    "import matplotlib.pyplot as plt\r\n",
+    "import numpy as np\r\n",
+    "\r\n",
+    "dimmer = Dimmer(frec=1, amp=1)"
+   ],
+   "outputs": [],
+   "metadata": {}
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "source": [
+    "print(f'Duty 100%           = {dimmer.convert_duty_rms(100):.4f} v')\r\n",
+    "print(f'Rms  220v           = {dimmer.convert_rms_duty(220):.4f} %')\r\n",
+    "print(f'amplitud            = {dimmer.amplitud}')\r\n",
+    "print(f'convert_duty_rms    = {dimmer.convert_duty_rms(100)}')\r\n",
+    "print(f'convert_rms_duty    = {dimmer.convert_rms_duty(0.7)}')\r\n",
+    "print(f'frequency           = {dimmer.frequency}')\r\n",
+    "print(f'solve_tint_for_duty = {dimmer.solve_tint_for_duty(100)}')\r\n",
+    "print(f'time_interrupt      = {dimmer.time_interrupt}')\r\n",
+    "print(f'v_dimmer            = {dimmer.v_dimmer(0.1)}')\r\n",
+    "print(f'_v_sine             = {dimmer._v_sine(0.1)}')\r\n",
+    "print(f'vrms_num            = {dimmer.vrms_num()}')\r\n",
+    "print(f'vrms_simbolic       = {dimmer.vrms_simbolic()}')"
+   ],
+   "outputs": [
+    {
+     "output_type": "stream",
+     "name": "stdout",
+     "text": [
+      "Duty 100%           = 70.7107 v\n",
+      "Rms  220v           = 31112.6984 %\n",
+      "amplitud            = 1\n",
+      "convert_duty_rms    = 70.71067811865476\n",
+      "convert_rms_duty    = 98.99494936611664\n",
+      "frequency           = 1\n",
+      "solve_tint_for_duty = 0.0\n",
+      "time_interrupt      = 0.5\n",
+      "v_dimmer            = 0\n",
+      "_v_sine             = 0.5877852522924731\n",
+      "vrms_num            = 0.0\n",
+      "vrms_simbolic       = 0.0\n"
+     ]
+    }
+   ],
+   "metadata": {}
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "source": [],
+   "outputs": [],
+   "metadata": {}
+  }
+ ],
+ "metadata": {
+  "orig_nbformat": 4,
+  "language_info": {
+   "name": "python",
+   "version": "3.9.1",
+   "mimetype": "text/x-python",
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "pygments_lexer": "ipython3",
+   "nbconvert_exporter": "python",
+   "file_extension": ".py"
+  },
+  "kernelspec": {
+   "name": "python3",
+   "display_name": "Python 3.9.1 64-bit ('env': venv)"
+  },
+  "interpreter": {
+   "hash": "a4046a09f199e48e61396275ea0e14da7d6ee49ffd95343aa82a9cc54eb636e7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
\ No newline at end of file
diff --git a/dimmer.py b/dimmer.py
new file mode 100644
index 0000000..2d72f6a
--- /dev/null
+++ b/dimmer.py
@@ -0,0 +1,76 @@
+import numpy as np
+from scipy.optimize import bisect
+
+
+class Dimmer:
+    def __init__(self, frec, amp, time_int=0) -> None:
+        self.frequency      = frec
+        self.amplitud       = amp
+        self.time_interrupt = time_int
+        self._periode       = 1 / frec
+        
+        
+    def _v_sine(self, t):
+        omega = 2 * np.pi * self.frequency
+        return self.amplitud * np.sin(omega * t)
+    
+    def v_dimmer(self, t):
+        per  = self._periode
+        tint = self.time_interrupt
+        
+        if (0 <= t and t < tint):
+            return 0
+        elif (tint <= t and t < 0.5 * per):
+            return self._v_sine(t)
+        elif (0.5*per <= t and t < 0.5*per + tint):
+            return 0
+        elif (0.5*per + tint <= t and t < per):
+            return self._v_sine(t)
+    
+    def vrms_num(self):
+        t_series = np.arange(0, self._periode, self._periode / 200)
+        v_series = [self.v_dimmer(t) for t in t_series]
+        v_sum    = 0
+        for i in v_series:
+            v_sum = v_sum + i**2
+        rms = np.sqrt(v_sum / len(v_series))
+        return rms
+    
+    def vrms_simbolic(self):
+        amp, omega = self.amplitud, 2 * np.pi * self.frequency
+        per, tint  = self._periode, self.time_interrupt
+        T1, T2     = 0, per
+
+        def sine_integrate(t):
+            int_a    = amp ** 2
+            int_b    = t / 2
+            int_c    = (np.sin(2*t*omega) / (4*omega))
+            sine_int = int_a * (int_b - int_c)
+            return sine_int
+
+        rms_a  = 1 / (T2 - T1)
+        rms_b1 = sine_integrate(T2 / 2)
+        rms_b2 = sine_integrate(tint)
+        rms_b  = (rms_b1 - rms_b2) * 2
+        rms    = np.sqrt(rms_a * rms_b)
+        return rms
+    
+    def convert_rms_duty(self, vrms):
+        vrms_max  = np.sqrt(2) * 0.5 * self.amplitud
+        vrms_duty = 100 * vrms / vrms_max
+        return vrms_duty
+    
+    def convert_duty_rms(self, vrms_duty):
+        vrms_max = np.sqrt(2) * 0.5 * self.amplitud
+        vrms     = vrms_duty * vrms_max
+        return vrms
+    
+    def solve_tint_for_duty(self, duty_perc):
+        def function(tint, bias=0):
+            self.time_interrupt = tint
+            vrms_max  = np.sqrt(2) * 0.5 * self.amplitud
+            vrms_duty = self.vrms_simbolic() / vrms_max
+            return vrms_duty - bias
+        root = bisect(function, 0, self._periode * 0.5, args=(duty_perc / 100))
+        return root
+    
\ No newline at end of file