The keychain-mounted TV-B-GONE can secretly switch off televisions in public places.
When Mitch Altman created the TV-B-Gone he envisioned a simple, keychain-mounted device that could surreptitiously switch off the annoyingly loud TVs in public places. But he was pleasantly surprised to find out that electronics enthusiasts had turned his invention into a hat, incorporated it into a mobile phone, modified it into a long-range “sniper” model, and tweaked it to provide more power output. These innovations led him to make the device open source, allowing anyone to build or hack their own model.
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