Month: April 2011

Make: Projects – CD / Suction Cup Status Dial

Make: Projects – CD / Suction Cup Status Dial

When I tried Jason’s trick for myself, however, I found that, while the hole in an optical disc does fit nicely over the hub of a hardware-store suction cup, all the cups I could find had this molded-in groove to accommodate a wire hook. This groove prevents the CD from fitting snugly around the hub, and allows it to spin too freely. If you only have two states you want to indicate (e.g. clean or dirty dishes), it’s really not a problem. But if you want better resolution, the fit needs to be snug so the dial can’t “drift.”

So I’ve added a bit of craft foam that fits down in the groove and secures the CD in place, and doubles as a pointer. This design adds just enough friction: The CD is easy enough to turn, but not so easy that it won’t stay where you put it.

I’ve included a printable version of the label I made for my own “returning at” sign, which can accurately indicate 96 separate states (any 15 minute interval in the 24 hours of a day), but the design could easily be adapted to other purposes.

Untouched By Human Hands

Untouched By Human Hands

I spent most of 2008 researching my novel For the Win, which is largely set in the factory cities of South China’s Pearl River Delta. If you own something stamped MADE IN CHINA (and you do!), chances are it was made in one of these cities, where tens of millions of young women have migrated […]