These steps will show you how to make your own Mobius Lantern with color changes.
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Step 1: Collect Your Materials!
You will need the following materials:
-- string or transparent fishing line
-- tricolor LED
-- http://arduino.cc/en/Main/ArduinoBoardDiecimila or other microcontroller
-- battery pack, at least 5V
-- approx. 10-100 ohm resistor calculate the value of your resistor here based on the materials you have available
In addition, you may need:
-- transparent tape
-- cutting board
-- cutting knife
Step 2: Assemble Your Circuit!
-- Solder wires to the leads on the LED. There should be one pad for each (red, green, and blue). There will also be a pad for the common cathode (ground). Solder the 100 Ohm resistor to the wire attached to the ground.
-- The ground wire will attach to the ground pin on the Arduino. The other three wires must be attached to pins labeled PWM on the Arduino. In our case those will be pins 9, 10, and 11.
-- Attach the battery to the top of the Arduino.
-- Tie string to the three holes on the Arduino board and tie them in the center above the board so that it hangs parallel to the ground.
Step 3: Program Your Arduino!
Program your Arduino with the code from this tutorial Arduino tutorial. We increased the fading speed.
Step 4: Cut the Mylar!
You can be creative with the size and shape of the strips. The attached cutting files are suggestions.
If you have access to a laser cutter:
-- upload the dxf files included here to the drawing program you use
-- cut them out on the laser cutter
If you do not have access to a laser cutter:
-- print out the pdf files included here as templates
-- place the mylar on a cutting board
-- stick the templates onto the mylar
-- use scissors or a cutting knife to cut out the shapes
Step 5: Assemble Your Lantern - 1!
-- Take the first strip of mylar (the widest one) and twist it once and then fold the tab under and over to secure it
-- Take the second strip of mylar (medium or thin) and wrap it around the loop you've just made, sliding it through the slit in the wide trip, secure as above
-- (optional) Take the third strip of mylar (wide or narrow) and repeat as above
Step 6: Assemble Your Lantern - 2!
-- Insert the board into the lantern near the top of the thicker strip
-- Make a small hole at the top of your lantern
-- Push the string through the hole and secure with a knot above and below the hole
Step 7: Enjoy the Glow!!!!
A sampling of the color changes can be seen in the photo below. Try rearranging the strips, adding more strips of different widths, and different thicknesses of Mylar for different effects.