building-redstone

Building Redstone

Critical: Block Placement Order

Support blocks FIRST, then dependent blocks! Blocks drop as items if support doesn't exist.

WRONG: 1.wire 2.button 3.blocks → Wire breaks!
RIGHT: 1.platform 2.walls 3.wire 4.button

Attachment Rules

Block	Support Location
redstone_wire, repeater, comparator, carpet, pressure_plate	Y-1 (below)
redstone_wall_torch, button, wall_sign	Same Y, offset by facing

Wall attachment facing: east→block at X-1, west→X+1, north→Z+1, south→Z-1

MCP Tools

build(commands=[
    "/fill X Y Z X2 Y Z2 stone",           # 1. Support
    "/setblock X Y+1 Z redstone_wire",     # 2. Redstone
    "/setblock X+1 Y+1 Z stone_button[facing=west,face=wall]",  # 3. Attachments
])

Logic Gates

NOT: [in]→[block]→[torch]→[out] — Torch inverts signal OR: Merge two wires at same block AND: Two torches→junction block→inverting torch→output XOR: Two comparators in subtract mode, OR their outputs

See gates.md for implementations.

Memory Circuits

RS Latch: Two torches in feedback loop (Set/Reset) T Flip-Flop: [in]→[dropper↔dropper]→[comparator]→[out] — Toggles state

Timing

Repeater Clock (3 minimum):

build(commands=[
    "/setblock X Y Z repeater[facing=east,delay=1]",
    "/setblock X+1 Y Z repeater[facing=south,delay=1]",
    "/setblock X+1 Y Z+1 repeater[facing=west,delay=1]",
    "/setblock X Y Z+1 redstone_wire",
])

Hopper Clock: [hopper→hopper] with comparator. Timing = items × 0.4s

Piston Door (2x2)

build(commands=[
    "/setblock X Y Z stone_bricks",
    "/setblock X Y+1 Z stone_bricks",
    "/setblock X-1 Y Z sticky_piston[facing=east]",
    "/setblock X-1 Y+1 Z sticky_piston[facing=east]",
    "/setblock X-2 Y Z redstone_wire",
    "/setblock X-2 Y+1 Z redstone_wire",
])

Block States

repeater[facing=north,delay=1-4,locked=false]
comparator[facing=south,mode=compare|subtract]
piston[facing=up,extended=false]
sticky_piston[facing=east,extended=true]
observer[facing=north]  # watches that direction
lever[face=wall,facing=north]
stone_button[face=wall,facing=east]