Make yourself

BUILD IT YOURSELF

To build your own viewer all you need are a few everyday items you can find in your garage, online, or at your local hardware store: cardboard, lenses, magnets, velcro and a rubber band.

DOWNLOAD INSTRUCTIONSFOR MANUFACTURERS

Cardboard

Corrugated cardboard sheet, preferably E Flute (corrugated cardboard comes in a variety of thicknesses called "flutes"), available at many art supply stores and online . For best results, you should look for strong, thin cardboard (sturdy shoe box rather than moving box). Minimum size: 8.75in (22cm) by 22in (56cm), and 0.06in (1.5mm) thickness. Online sources hereand here

Lenses

This is the trickiest component. Lenses that have a 45mm focal distance might work. Biconvex lenses work best because they prevent distortion around the edges.

Magnets

One neodymium ring magnet - likethis or this - and one ceramic disk magnet - like this or this. Approximate size: 0.75in (19mm) diameter and 0.12in (3mm) thickness.

Velcro

Two strips of regular strength adhesive-backed velcro. Approximate size: 0.75in (20mm) by 1.25in (30mm).

Rubber band

One rubber band, to prevent the phone from sliding out. Minimum length of 3.2in (8cm).

NFC tag (optional)

One sticker NFC tag. Program it with the URL cardboard://v1.0.0