Maker taps Raspberry Pi to turn Wi-Fi Signals into Wall-Art.

Unless you live in a Faraday cage, you're surrounded at all times by invisible radio signals, from Bluetooth and Wi-Fi to cellular traffic. French artist [Théo Champion] has found a way to make that wireless noise visible, with an intense piece of Raspberry Pi-driven art that turns nearby radio activity into light.

https://rootkid.me/works/spectrum-slit

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