diff --git a/examples/ACS712_20_AC_DEMO/ACS712_20_AC_DEMO.ino b/examples/ACS712_20_AC_DEMO/ACS712_20_AC_DEMO.ino
index d8f2b61..1fc7b0e 100644
--- a/examples/ACS712_20_AC_DEMO/ACS712_20_AC_DEMO.ino
+++ b/examples/ACS712_20_AC_DEMO/ACS712_20_AC_DEMO.ino
@@ -54,5 +54,5 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/ACS712_20_AC_SAMPLING_DEMO/ACS712_20_AC_SAMPLING_DEMO.ino b/examples/ACS712_20_AC_SAMPLING_DEMO/ACS712_20_AC_SAMPLING_DEMO.ino
index 6693d86..778a887 100644
--- a/examples/ACS712_20_AC_SAMPLING_DEMO/ACS712_20_AC_SAMPLING_DEMO.ino
+++ b/examples/ACS712_20_AC_SAMPLING_DEMO/ACS712_20_AC_SAMPLING_DEMO.ino
@@ -49,4 +49,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_average/ACS712_20_AC_average.ino b/examples/ACS712_20_AC_average/ACS712_20_AC_average.ino
index ec8ba82..1ca24e8 100644
--- a/examples/ACS712_20_AC_average/ACS712_20_AC_average.ino
+++ b/examples/ACS712_20_AC_average/ACS712_20_AC_average.ino
@@ -41,7 +41,7 @@ void loop()
   uint32_t start = millis();
   for (int i = 0; i < 100; i++)
   {
-    //  select sppropriate function
+    //  select appropriate function
     //  average += ACS.mA_AC_sampling();
     average += ACS.mA_AC();
   }
@@ -56,4 +56,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_compare/ACS712_20_AC_compare.ino b/examples/ACS712_20_AC_compare/ACS712_20_AC_compare.ino
index f31cfb0..6882896 100644
--- a/examples/ACS712_20_AC_compare/ACS712_20_AC_compare.ino
+++ b/examples/ACS712_20_AC_compare/ACS712_20_AC_compare.ino
@@ -47,4 +47,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_low_pass/ACS712_20_AC_low_pass.ino b/examples/ACS712_20_AC_low_pass/ACS712_20_AC_low_pass.ino
index 453eb39..68179fc 100644
--- a/examples/ACS712_20_AC_low_pass/ACS712_20_AC_low_pass.ino
+++ b/examples/ACS712_20_AC_low_pass/ACS712_20_AC_low_pass.ino
@@ -38,16 +38,16 @@ void setup()
   Serial.print("Amp/Step: ");
   Serial.println(ACS.getAmperePerStep(), 4);
 
-  value = ACS.mA_AC();  // get good initial value
+  value = ACS.mA_AC();             //  get good initial value
 }
 
 
 void loop()
 {
-  //  select sppropriate function
+  //  select appropriate function
   float mA = ACS.mA_AC_sampling();
-  // float mA = ACS.mA_AC();
-  value += weight * (mA - value);  // low pass filtering
+  //  float mA = ACS.mA_AC();
+  value += weight * (mA - value);  //  low pass filtering
 
   Serial.print("weight: ");
   Serial.print(weight);
@@ -61,4 +61,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_midPoint_compare/ACS712_20_AC_midPoint_compare.ino b/examples/ACS712_20_AC_midPoint_compare/ACS712_20_AC_midPoint_compare.ino
index 90df1d6..c2cee54 100644
--- a/examples/ACS712_20_AC_midPoint_compare/ACS712_20_AC_midPoint_compare.ino
+++ b/examples/ACS712_20_AC_midPoint_compare/ACS712_20_AC_midPoint_compare.ino
@@ -51,4 +51,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_midPoint_performance/ACS712_20_AC_midPoint_performance.ino b/examples/ACS712_20_AC_midPoint_performance/ACS712_20_AC_midPoint_performance.ino
index d608a11..5f4211f 100644
--- a/examples/ACS712_20_AC_midPoint_performance/ACS712_20_AC_midPoint_performance.ino
+++ b/examples/ACS712_20_AC_midPoint_performance/ACS712_20_AC_midPoint_performance.ino
@@ -71,4 +71,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_AC_suppress_noise/ACS712_20_AC_suppress_noise.ino b/examples/ACS712_20_AC_suppress_noise/ACS712_20_AC_suppress_noise.ino
index 2ff3063..f3e8683 100644
--- a/examples/ACS712_20_AC_suppress_noise/ACS712_20_AC_suppress_noise.ino
+++ b/examples/ACS712_20_AC_suppress_noise/ACS712_20_AC_suppress_noise.ino
@@ -70,4 +70,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_DC/ACS712_20_DC.ino b/examples/ACS712_20_DC/ACS712_20_DC.ino
index 4a39206..45455ed 100644
--- a/examples/ACS712_20_DC/ACS712_20_DC.ino
+++ b/examples/ACS712_20_DC/ACS712_20_DC.ino
@@ -3,9 +3,10 @@
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo to measure mA DC
 //     URL: https://github.com/RobTillaart/ACS712
-
+//
 //  use with Arduino Serial Plotter
 
+
 #include "ACS712.h"
 
 
@@ -41,4 +42,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_DC_DEMO/ACS712_20_DC_DEMO.ino b/examples/ACS712_20_DC_DEMO/ACS712_20_DC_DEMO.ino
index c5de255..7d95a74 100644
--- a/examples/ACS712_20_DC_DEMO/ACS712_20_DC_DEMO.ino
+++ b/examples/ACS712_20_DC_DEMO/ACS712_20_DC_DEMO.ino
@@ -52,5 +52,5 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/ACS712_20_DC_external_ADC/ACS712_20_DC_external_ADC.ino b/examples/ACS712_20_DC_external_ADC/ACS712_20_DC_external_ADC.ino
index 8c2c4b7..fd042d0 100644
--- a/examples/ACS712_20_DC_external_ADC/ACS712_20_DC_external_ADC.ino
+++ b/examples/ACS712_20_DC_external_ADC/ACS712_20_DC_external_ADC.ino
@@ -3,9 +3,8 @@
 //  AUTHOR: Rob Tillaart
 // PURPOSE: demo to measure mA DC with external ADC
 //     URL: https://github.com/RobTillaart/ACS712
-
+//
 //  see also ACS712_ESP32_external_ADC.ino
-
 //  use with Arduino Serial Plotter
 
 #include "ACS712.h"
@@ -56,4 +55,4 @@ uint16_t testADC(uint8_t p)
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_determine_form_factor/ACS712_20_determine_form_factor.ino b/examples/ACS712_20_determine_form_factor/ACS712_20_determine_form_factor.ino
index d0f8576..43ad1d2 100644
--- a/examples/ACS712_20_determine_form_factor/ACS712_20_determine_form_factor.ino
+++ b/examples/ACS712_20_determine_form_factor/ACS712_20_determine_form_factor.ino
@@ -52,4 +52,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_20_mV_noise_level/ACS712_20_mV_noise_level.ino b/examples/ACS712_20_mV_noise_level/ACS712_20_mV_noise_level.ino
index 9fadb09..f42f278 100644
--- a/examples/ACS712_20_mV_noise_level/ACS712_20_mV_noise_level.ino
+++ b/examples/ACS712_20_mV_noise_level/ACS712_20_mV_noise_level.ino
@@ -44,4 +44,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_ESP32_external_ADC/ACS712_ESP32_external_ADC.ino b/examples/ACS712_ESP32_external_ADC/ACS712_ESP32_external_ADC.ino
index f49b03a..8c043a5 100644
--- a/examples/ACS712_ESP32_external_ADC/ACS712_ESP32_external_ADC.ino
+++ b/examples/ACS712_ESP32_external_ADC/ACS712_ESP32_external_ADC.ino
@@ -19,7 +19,7 @@
 #define SENSOR_ACS712_ADSPIN    1
 
 
-//  explicit params for demo
+//  explicit parameters for demo
 ADS1015 ads1015(ADS1015_ADDRESS, &Wire);  //  ADS1015 == 12 bit
 
 
diff --git a/examples/ACS712_I2C_display/ACS712_I2C_display.ino b/examples/ACS712_I2C_display/ACS712_I2C_display.ino
index 770671a..9e42132 100644
--- a/examples/ACS712_I2C_display/ACS712_I2C_display.ino
+++ b/examples/ACS712_I2C_display/ACS712_I2C_display.ino
@@ -54,15 +54,15 @@ void setup()
   Serial.print("ACS712_LIB_VERSION: ");
   Serial.println(ACS712_LIB_VERSION);
 
+  Wire.begin();
+
   lcd.begin(16, 2);
   lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
   lcd.setBacklight(BL_ON);
 
   lcd.clear();
 
-
   ACS.autoMidPoint();
-
 }
 
 
@@ -87,4 +87,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/ACS712_detectFrequency/ACS712_detectFrequency.ino b/examples/ACS712_detectFrequency/ACS712_detectFrequency.ino
index 6df4e01..5c83c26 100644
--- a/examples/ACS712_detectFrequency/ACS712_detectFrequency.ino
+++ b/examples/ACS712_detectFrequency/ACS712_detectFrequency.ino
@@ -45,5 +45,5 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/RMS_by_sampling/RMS_by_sampling.ino b/examples/RMS_by_sampling/RMS_by_sampling.ino
index 2f9248f..0dafad3 100644
--- a/examples/RMS_by_sampling/RMS_by_sampling.ino
+++ b/examples/RMS_by_sampling/RMS_by_sampling.ino
@@ -52,4 +52,4 @@ float mA_AC_sampling(float frequency, float mVperStep, float mVperAmpere, uint8_
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --