How to Measure Craftable Recipes with a Comparator

Reading Storage with a Comparator

You can monitor how many items are ready to be crafted by attaching a redstone comparator directly to the Crafting Automat. Unlike vanilla storage blocks, the comparator output is tied strictly to the number of complete recipes currently available.

The comparator only reads the items sitting inside the 9 internal storage slots. Items placed directly in the crafting matrix template do not count toward this measurement.

Understanding the Doubling Signal Scale

The redstone power (RP) emitted by the comparator increases logarithmically rather than linearly. Every single unit increase in signal strength represents double the amount of craftable recipes:

• 1 craftable recipe: 1 RP
• 2 craftable recipes: 2 RP
• 4 craftable recipes: 3 RP
• 8 craftable recipes: 4 RP

Each subsequent redstone level requires twice as many full sets of ingredients in the internal storage. You can run this redstone output into indicator lamps to gauge reserve levels or into repeaters to disable supply lines when your reserves reach capacity.