tweaked the analog voltage
diff --git a/aos/crio/hardware/digital_source.h b/aos/crio/hardware/digital_source.h
index 9980bd0..37b2c6f 100644
--- a/aos/crio/hardware/digital_source.h
+++ b/aos/crio/hardware/digital_source.h
@@ -35,7 +35,7 @@
  public:
   // Defaults for the voltages for AnalogTriggers. They work well for digital
   // sensors connected to analog inputs.
-  static const float kDefaultLowerVoltage = 1;
+  static const float kDefaultLowerVoltage = 1.35;
   static const float kDefaultUpperVoltage = 4;
 
   // Will set up the voltages on trigger.