Minecraft wiki entry for Comparator_update_detector, associated text: 1 What it detects
2 Types of CUD Switches
2.1 Chest based
2.1.1 Using Ocelot
2.2 Cauldron based
2.3 Redirecting based
2.4 Item frame based
3 Variations
3.1 T-CUD
4 Why and how it works
5 History
6 References