Invisible Wi-Fi signals caught on cameraSubmitted by PWA on Tue, 12/04/2012 - 09:46
Computer icons can give you an idea of your Wi-Fi signal strength. But now Timo Arnall and a team of designers from the Oslo School of Architecture & Design have created a device that can produce a large scale visualisation of the fluctuating Wi-Fi signals around a city (see video above).
Their latest prototype is a four-metre-tall rod, lined with LEDs, that incorporates a microcontroller and a Wi-Fi connector, used to detect surrounding networks. Once the team chooses a network to focus on, a computer program uses the Wi-Fi module to reveal its signal strength, which is displayed by lighting up an appropriate number of LEDs.
The signal reading is updated every three seconds so a changing bar made of lights is produced as the user walks around with the rod. By setting up a locked-off camera with a long exposure, a light painting that looks like a bar graph is produced over time.