Step 1: Materials & Tools
- 2 sheets of 12 x 20 black museum board or something comparable.
- A battery pack from Radioshack that hold 4 AA batteries. (total output 6V)
- 1 (or 2) super bright LEDs. I used two of these https://www.sparkfun.com/products/9658? (They are rated for about 3.15 to 3.99V and max 700mA)
- Since these LEDs draw a lot of current, be sure to make a bundle of resistors in parallel to handle the current, or else things might catch on fire. One bundle of resistors for each LED. I used three 470ohm resistors plus one 4.7ohm. (you want something low around 4.7ohms as the resulting total value. Use any combination, just make sure your math is right.)
- Optional – (If you want it to spin) A pretty torque-y dc motor with some kinda platform for the thing to sit on. I ran it at 3.3V, off of an independent power source.
- laser cutter
- soldering iron
- hot glue gun
Step 2: Laser Cut!
Cut the red lines & score the black lines.
After you cut, you’ll have to poke out the circles with something tiny and sharp.
Step 3: Build It!
- One tip: peel off half the layer of the scored tabs, it’ll make the whole shape fit a lot better when you get to gluing.
- Get to glueing! I used hot glue for a quick fix. You can also use krazy glue of you want, just something fast drying.
- When glueing the second half of the thing, leave one of the panels open without glue so you can get the LEDs in.
Step 4: Wire Up the LEDs and Battery Pack
Solder the resistors to the LED and wire it up to the battery pack.
Step 5: Putting It All Together
(optional: wire up a DC motor with a platform and place the whole dome on it to make it spin.)