Stages

3-43-Way SwitchesTurn the light on and off from both the bottom and the top of the stairs

Power off

Parts

This stage can be solved with wiring alone.

Goals

  • S1 (bottom of the stairs) toggles L1, whichever way S2 is set
  • S2 (top of the stairs) toggles L1, whichever way S1 is set

Rules

  • Don't burn out the LED (25 mA max)
  • No short circuits
B13VS1S2R1100ΩL1Red−+abab+−

Selected

Press a terminal (the small ◯) to start a wire. Press where you want to bend to place corners, and finish on another terminal or on a wire. Press the middle of a wire and then somewhere else to draw a branch from there. You can drag parts and wires to move them. When you are ready, press "Run!" to turn on the power, and try the switches while it is on.

Line mode

Keys

W
Draw wire
R
Rotate
M
Move
G
Drag
Del
Delete
⌘Z
Undo
⌘⇧Z
Redo
Enter
Run
Home
Fit
H
Hint

Wheel to zoom, right-drag to pan