If you've ever wondered where that airplane overhead is headed, here's a solution. Adafruit Blog features an open-source desk radar project by maker Danilo Cannas that displays nearby aircraft on a one-inch OLED screen. Built around an E-S-P eight-two-six-six microcontroller and three-D-printed enclosure, it taps into ADS-B signals—the automatic broadcast system that aircraft use to transmit their location, altitude, and flight data. It's an elegant way to bring real-time air traffic into your workspace.

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