diff --git a/picar/SunFounder_PCA9685/PCA9685.py b/picar/SunFounder_PCA9685/PCA9685.py
index 1b4ecce..b659080 100644
--- a/picar/SunFounder_PCA9685/PCA9685.py
+++ b/picar/SunFounder_PCA9685/PCA9685.py
@@ -52,7 +52,7 @@ def _debug_(self,message):
     
     def setup(self):
         '''Init the class with bus_number and address'''
-        self._debug_('Reseting PCA9685 MODE1 (without SLEEP) and MODE2')
+        self._debug_('Resetting PCA9685 MODE1 (without SLEEP) and MODE2')
         self.write_all_value(0, 0)
         self._write_byte_data(self._MODE2, self._OUTDRV)
         self._write_byte_data(self._MODE1, self._ALLCALL)
@@ -119,14 +119,14 @@ def _check_i2c(self):
             for address in tmp_addresses:
                 if address != '--':
                     addresses.append(address)
-        print("Conneceted i2c device:")
+        print("Connected i2c device:")
         if addresses == []:
             print("None")
         else:
             for address in addresses:
                 print("  0x%s" % address)
         if "%02X" % self.address in addresses:
-            print("Wierd, I2C device is connected, Try to run the program again, If problem stills, email this information to support@sunfounder.com")
+            print("Weird, I2C device is connected, Try to run the program again, If problem persists, email this information to support@sunfounder.com")
         else:
             print("Device is missing.")
             print("Check the address or wiring of PCA9685 Server driver, or email this information to support@sunfounder.com")
@@ -176,7 +176,8 @@ def write_all_value(self, on, off):
 
     def map(self, x, in_min, in_max, out_min, out_max):
         '''To map the value from arange to another'''
-        return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min
+        # need to map to int to avoid returning float with Python3 division operator
+        return int((x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min)
 
     @property
     def debug(self):
diff --git a/picar/SunFounder_PCA9685/README.md b/picar/SunFounder_PCA9685/README.md
index ec0c2b3..d247598 100644
--- a/picar/SunFounder_PCA9685/README.md
+++ b/picar/SunFounder_PCA9685/README.md
@@ -29,7 +29,7 @@ SunFounder is a technology company focused on Raspberry Pi and Arduino open sour
 This is the code for SunFounder PCA9685.
 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
 
-This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied wa rranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.