Good Luck Is Just One Click Away

There is an old superstition that says talking about your good fortune can jinx it, unless you knock on wood to keep the bad luck away. That's easy enough to do when you're sitting at a wooden desk, but what happens when there isn't any wood nearby? Designers Shashwath Santosh and Nithin Eluvathingal have come up with a technological solution to this problem. Their internet-connected Knock on Wood machines let you knock on a piece of wood anywhere in the world, without actually having to touch it.

The hardware behind each Knock on Wood machine is fairly simple. An ESP32-based controller with a dot matrix display is connected to a servo motor that physically knocks on a wooden surface. The device connects to the internet over Wi-Fi, allowing it to receive commands from people who might be thousands of miles away.

You know you want to press it (📷: S....

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