diff --git a/src/main/java/frc/robot/Constants.java b/src/main/java/frc/robot/Constants.java
index 56a69fb..ed93730 100644
--- a/src/main/java/frc/robot/Constants.java
+++ b/src/main/java/frc/robot/Constants.java
@@ -13,6 +13,8 @@
 
 package frc.robot;
 
+import static edu.wpi.first.units.Units.Inches;
+import static edu.wpi.first.units.Units.Volts;
 import static edu.wpi.first.units.Units.Inches;
 import static edu.wpi.first.units.Units.Meters;
 import static edu.wpi.first.units.Units.Rotations;
@@ -30,6 +32,7 @@
 import edu.wpi.first.units.measure.AngularVelocity;
 import edu.wpi.first.units.measure.Distance;
 import edu.wpi.first.units.measure.Velocity;
+import edu.wpi.first.units.measure.Voltage;
 import edu.wpi.first.wpilibj.RobotBase;
 import frc.lib.W8.mechanisms.rotary.RotaryMechanism.RotaryMechCharacteristics;
 
@@ -85,6 +88,7 @@ public class HopperConstants {
     public static final Distance MIN_DISTANCE = Inches.of(0.0);
     public static final Distance MAX_DISTANCE = Inches.of(15.0);
     public static final Distance STARTING_DISTANCE = Inches.of(0.0);
+    public static final Voltage VOLTAGE = Volts.of(12.0);
   }
 
   public class Ports {
diff --git a/src/main/java/frc/robot/subsystems/hopper/Hopper.java b/src/main/java/frc/robot/subsystems/hopper/Hopper.java
index 039e7e1..28635d7 100644
--- a/src/main/java/frc/robot/subsystems/hopper/Hopper.java
+++ b/src/main/java/frc/robot/subsystems/hopper/Hopper.java
@@ -1,16 +1,21 @@
 package frc.robot.subsystems.hopper;
 
 import edu.wpi.first.wpilibj2.command.SubsystemBase;
-import frc.lib.W8.mechanisms.flywheel.FlywheelMechanism;
+import frc.lib.W8.mechanisms.rotary.RotaryMechanism;
+import frc.robot.HopperCOnstants;
 
 public class Hopper extends SubsystemBase {
 
-    private FlywheelMechanism _io;
+    private RotaryMechanism _io;
 
-    public Hopper(FlywheelMechanism io) {
+    public Hopper(RotaryMechanism io) {
         _io = io;
     }
 
+    public void runHopper() {
+        _io.runVoltage(HopperConstants.VOLTAGE);
+    }
+
     @Override
     public void periodic() {