diff --git a/examples/Analog_input/Analog_input_0_10V/Analog_input_0_10V.ino b/examples/Analog_input/Analog_input_0_10V/Analog_input_0_10V.ino
index 9305875..4a81400 100644
--- a/examples/Analog_input/Analog_input_0_10V/Analog_input_0_10V.ino
+++ b/examples/Analog_input/Analog_input_0_10V/Analog_input_0_10V.ino
@@ -20,7 +20,7 @@
 using namespace machinecontrol;
 
 float res_divider = 0.28057;
-float reference = 3.3;
+float reference = 3.0;
 
 void setup() {
   analogReadResolution(16);
diff --git a/examples/Analog_input/Analog_input_4_20mA/Analog_input_4_20mA.ino b/examples/Analog_input/Analog_input_4_20mA/Analog_input_4_20mA.ino
index 167de2d..6c9b614 100644
--- a/examples/Analog_input/Analog_input_4_20mA/Analog_input_4_20mA.ino
+++ b/examples/Analog_input/Analog_input_4_20mA/Analog_input_4_20mA.ino
@@ -21,7 +21,7 @@ using namespace machinecontrol;
 
 #define SENSE_RES 120
 
-float reference = 3.3;
+float reference = 3.0;
 
 void setup() {
   analogReadResolution(16);
diff --git a/examples/Analog_input/Analog_input_NTC/Analog_input_NTC.ino b/examples/Analog_input/Analog_input_NTC/Analog_input_NTC.ino
index d15149c..cada7d0 100644
--- a/examples/Analog_input/Analog_input_NTC/Analog_input_NTC.ino
+++ b/examples/Analog_input/Analog_input_NTC/Analog_input_NTC.ino
@@ -26,7 +26,7 @@ using namespace machinecontrol;
 
 #define REFERENCE_RES 100000
 
-float reference = 3.3;
+float reference = 3.0;
 float lowest_voltage = 2.7;
 
 void setup() {