A Device to Turn Traffic Lights Green

Here’s a story about a hacker who reprogrammed a device called “Flipper Zero” to mimic Opticom transmitters—to turn traffic lights in his path green.

As mentioned earlier, the Flipper Zero has a built-in sub-GHz radio that lets the device receive data (or transmit it, with the right firmware in approved regions) on the same wireless frequencies as keyfobs and other devices. Most traffic preemption devices intended for emergency traffic redirection don’t actually transmit signals over RF. Instead, they use optical technology to beam infrared light from vehicles to static receivers mounted on traffic light poles…

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Hackaday Links: February 12, 2023

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So, maybe right now isn’t the best time to get into the high-altitude ballooning hobby? At least in the US, which with the downing of another — whatever? — over …read more Continue reading Hackaday Links: February 12, 2023→

AI-aided alien search detects 8 “very suspicious” radio signals

It’s estimated that the universe contains hundreds of billions of galaxies, and each galaxy has about that many planets, so the chances are incredibly small that Earth is the only place with life. A new AI system has now scoured millions of radio signa… Continue reading AI-aided alien search detects 8 “very suspicious” radio signals→

Long-lost invisible stellar graveyard revealed by radio telescope duo

Models of the universe predict that supernova remnants should be far more common than they are. Now, a new image from sensitive radio telescopes reveal that the missing remnants are hiding in plain sight.Continue ReadingCategory: Space, ScienceTags: Su… Continue reading Long-lost invisible stellar graveyard revealed by radio telescope duo→

Fast radio burst reveals the Milky Way is emptier than we thought

The intriguing cosmic mystery of fast radio bursts (FRBs) has now shed light (pun intended) on another mystery. By studying the signature of an FRB from a nearby galaxy, astronomers have found that the Milky Way has far less matter than expected.Contin… Continue reading Fast radio burst reveals the Milky Way is emptier than we thought→