PhysicalConnectivity/src/main/resources/data/phycon/recipes/switch.json

{
  "type": "minecraft:crafting_shaped",
  "pattern": [
    "ICI",
    "CSC",
    "ICI"
  ],
  "key": {
    "S": {"item": "phycon:silicon_wafer"},
    "C": {"item": "phycon:cable"},
    "I": {"tag": "c:iron_ingots"}
  },
  "result": {
    "item": "phycon:switch"
  }
}