Light Puzzle




Light Puzzle is an interactive light display. User can change the position of the light and line patterns by attaching and detaching the plates.
The lights will only light up if all lines are aligned together in one straight line.

Step 1: MaterialsTools

- cardboard/ foamboard
- 9 LEDs (different colours preferable)
- 9 1K� resistors
- conductive tape
- tape
- wire
- cables
- one 1.5 volts battery with the holder

- scissors
- plier

Step 2: Step1

1. Cut the cardboard/foamboard into 9 pieces.
2. Draw the line patterns.
  • Two lines intersect with each other on the front part of the cardboard/foamboard.
  • Two lines intersect with each other on the back part of the cardboard/foamboard.
  • The lines from both sides should not be drawn on the same position.
  • Front: TOP LEFT, Back: BOTTOM RIGHT.
  • Front: BOTTOM LEFT, Back: TOP RIGHT.
  • Front: BOTTOM RIGHT, Back: TOP LEFT.
3. Mount the LED in the center of the each cardboard/foamboard.

Step 3: Step2

1. Stick the conductive tape according to the drawn lines. (2 lines in front and 2 lines at the back).
Front --> with LED head on the surface
Back --> with LED legs on the surface
2. Connect the long leg of the LED with a resistor.
3. The other side of the resistor leg should go through the board and touch the conductive tape on the front part (you can tape it using conductive tape).
4. The short leg of the LED should touch one of the conductive tape on the back part (you can tape it using conductive tape).

Step 4: Step3

1. Test the LED with a 1.5 volts battery.
  • (+) on any of the front lines and (-) on any of the back lines.
2. Create another LED plate (the same steps as the first one).
3. Connect both front lines and back lines together. (Rotate the plate so that both lines (front and back) meet with the other plate).

Step 5: Step4

1. Create 9 pieces of LED plate.
2. Attach a bent wire on every end of the conductive tape (front and back), 8 in total for one plate.

Step 6: Step5

1. Make hooks to hang one plate to another.
2. Patterns of lines can be changed by rotating the plates but a line from one plate to another should be aligned in one straight line.
3. A 1.5 volts battery is connected to one of the plates.



    • Epilog X Contest

      Epilog X Contest
    • Tape Contest

      Tape Contest
    • Pocket Sized Contest

      Pocket Sized Contest

    10 Discussions


    Reply 9 years ago on Introduction

    Now, that you said it, yeah, it's like a 2D Rubik's cube, where we have to align the squares. Thanks for pointing that out, never thought about it that way. :D


    9 years ago on Introduction

    That would be possible, you could have magnets that could complete the the circuit and clip the wooden nodes together! Great Instructable!

    2 replies

    Reply 9 years ago on Introduction

    True. The wire hangers are a bit difficult when it comes to attaching and detaching the plates. Thank you for the suggestion! :D


    9 years ago on Introduction

    Cool concept. I'd love to see it recreated as a tabletop game, made out of wood or transparent plastic.

    1 reply

    Reply 9 years ago on Introduction

    Thank You! That would be a good idea. Thanks for the suggestion :D