It’s very simple to build a centriphone. All the things you need to build a centriphone you’ll find at your home.
What you’ll need:
- 2 PET-Bottles
- 1 key ring
- some cord (about 3 m)
- an old phone case
STEP 1: BUILDING YOUR GRIP
Take a hairdryer and heat up the plastic bottle. When it gets soft, compress the bottle until it looks like the bottle you see in the picture above.
Now take your key ring and put it on the bottle until it is placed under the cap.
STEP 2: MAKING SOME KNOTS
Take some cord and tie something like this. You’ll have to make some holes in the case, so you can slip the cord through. The center of gravity should be between the camera and middle of the case. Adjust it so you can’t see the knot on the camera.
For better results you also could use fishing line instead of normal cord.
STEP 3: ADDING A WING
With the cord you stabilized 2 of the 3 axes. For the third one you have to add a wing. In my first construction we made a wing out of card stock. The bottle-wing worked better. It is also no problem if it gets wet from the snow.
Cut the bottle as shown above (cutting template on right panel). The parts A & B must be squeezed between cell phone and cases.
1: approx. 3 cm
2: approx. 2 cm longer than the width of your phone
It’s recommendable to make some holes (“3”) at the end of the cut “2” so it doesn’t tear open.
STEP 4: SWINGING IT
For my video I used a Sony XPERIA Z3 compact. A big benefit is, that the phone is waterproof. For phones which are not waterproof I recommend a waterproof case.
For filming I activate the Touch lock-Feature because I didn’t want the phone to stop recording.
check out my centriphone-Videos
For the first video I used my rig with a card stock wing and no key ring.
In the improved version I replaced the card stock with a PET-bottle and added a key ring.