After my girlfriend successfully completed Portal 1, both of us were craving to have one of those cute, little turrets on our desks. We came up with Kinder Eggs (http://en.wikipedia.org/wiki/Kinder_Surprise ) because they roughly fit the ellipsoid shape and are very stable. Unfortunately the turret cannot shoot but instead of that it's equipped with an LED that lights up if you pinch the two antennas on top.
Read on and discover how you can build your own turret for your desk. Feel free to comment if you have any questions :)
Edit: I've noticed there is another rather similar instructable around. We did not steal or copy anyone's ideas, we came up with these turrets on our own.
Step 1: What Materials/tools Do You Need?
Materials (length specifications include enough buffer):
- an empty Kinder Egg of the newer series, i.e. not the ones that consist of two parts (see images for reference)
- a 28cm and a 16cm part of black, solid copper wire with a diameter of approx. 2mm (incl. coating)
- one spoke reflector
- a 5mm LED in your favourite colour
- an LED holder (ours came from an indicator LED of an old PC – take a look at the images)
- a CR2032 coin cell battery holder (from the mainboard of the PC - use duct tape if you can't get hold of one)
- two 5cm parts of thin, solid copper wire to be used as antennas and as the switch
- acrylic colours
- skilled and/or thin fingers!
- a pair of combination pliers
- a paint brush
- a soldering gun
- a wire stripper
- a round file
- a small nail
Step 2: Make Holes
Step 3: They Come in Hundreds of Designer Colours...
After two layers of colour the yellow plastic didn't shine through anymore, but you might want to put a third layer on top.
While the colour dries you can already take care of the soldering part in the next step.
Step 4: Soldering
Test whether your LED is plugged in the right way.
Step 5: Creating the Legs
- bend one end of the shorter wire to a tight, little spiral followed by a 180° turn in the opposite direction (we suggest taking a clarifying look at the images)
- bend the longer wire in half while creating a loop with your thumb (images, again :D)
The loop will keep the whole leg structure in place because it adds pressure from above.
We recommend widening the holes for the wires now, if you haven't done that before.
Push the non-spirraled side of the hind leg from the inside of the turret through the corresponding hole to the outside. Secure the spiral in the bottom centre of the turret, then push both forelegs through their holes (again, from the inside to the outside). Estimate how much of the cable you can push out to leave the loop at the top of the egg if it's closed.
Sculpt the wires in a way that they match the shape of the egg and press them hard to the bottom so they keep the hind leg in place.
Your turret should now resemble ours on the third image.
Do your best in sculpting the outside legs (google for reference images) then head for shortening the wires. You will most likely discover now why it's so easy to knock them over in the game. ;)
Step 6: Putting It All Together
The only thing left to do is to pinch off three 1cm parts of spoke reflector with the pliers. Clip them onto the legs (or paint them before, if necessary).
Step 7: There You Are :)
Remember to comment if you have annotations or problems with this project.
If you're motivated, you may try to realise one (or more?) of the following ideas:
Try adding a small headphone loudspeaker to the turret. This would even work without ugly cables coming out of the turret – because you can misuse the legs as the two contacts required for the speaker. :) Build some sort of “dock” with two separated metal surfaces, connect a 3,5mm audio jack to them, strip the tip of the legs a bit and solder the speaker to the legs inside.
You could also just outsource the battery with this dock and have your turret's LED light up as soon as it gets electricity on its legs – that would definitely simplify changing the battery.
Or try making the LED music reactive: Just combine the turret, the dock idea from above and a music reactive LED instructable.
Post a comment if you've done so, we're happy to see your creations. :)