Technology

How-To: RF Shielded Wallet

How-To: RF Shielded Wallet

With short range wireless technology becoming increasing prevalent in the various cards we hold in our wallets, Serge Negrashov decided to make his own radio frequency shielded wallet to block any potential wireless data snoops. He used extremely strong Kevlar-Nomex as the fabric and painted the inside with silver epoxy to give the wallet its shielding quality. If you’re looking for a budget version, he says that regular epoxy with a layer of tin foil might work as well. What do you think of RF shielded wallets? Better safe than sorry or overboard paranoia?

Toilet Paper Printer

Toilet Paper Printer

Built as a submission to “Mach flott den Schrott”, a hardware hacking contest put on by German technology magazine c’t, Mario Lukas’ Toilettenpapier-Drucker (Toilet Paper Printer) combines parts scavenged from surplus CD-ROM drives, an Arduino, and some miscellaneous bits to create a printer with a unique output. Supplied with an RSS or Twitter feed, the device will inscribe up-to-the-minute news on your favorite 2-ply.

Paint Your Circuits with Bare Conductive

At World Maker Faire, I finally got to see paintable circuits in action. Matt Johnson spoke with me about the conductive paint that people were using and showed me a few projects that demonstrate the possibilities. The business cards they brought were printed with a swath of conductive paint suitable for some home experimenting.

Bare Conductive grew out of the founders’ graduate studies at the Innovation Design Engineering Course at the Royal College of Art and Imperial College London. The version of their conductive paints they had at Maker Faire is similar to the skin paint featured in a music video of a few years back.

The paints can be used to create traditional circuits, and for signalling with the Arduino. Since the company has just passed its’ regulatory approvals, we can expect to see many new experiments as the community of users grows.

Getting Started with XBee Internet Gateway (XIG)

The XBee Internet Gateway (XIG) is a Python script for Digi’s ConnectPort wireless to ethernet gateway which lets you connect your XBee wireless modules to the internet fairly easily. Jordan Husney, lead programmer of the XIG project, has started releasing a series videos all about XIG and what you can do with it. In the first video, Jordan introduces XIG and walks through the process of setting up the gateway. The XIG is also discussed in Rob Faludi’s Building Wireless Sensor Networks and is a core component of my own Networked On Air Light project. If you’re looking for a way to put your project online using wireless mesh networking, be sure to check out XIG.