Wall Clock – Smart Clock for your Desktop

It’s been so long time I was looking for a clock app or night stand to use across my devices when they are idle to display the time and some useful information. But unfortunately most of the existing application only available on few platforms and does not offer the useful information to the end users.

In past couple of years I have tried to make unique clock applications on Windows Phone platform. The feedback usually I got from the users was encouraging me to make it more efficient and user friendly and keep adding features until I got different type of review from one of the users. The main point of the reviewer was, in the time where the clock is displayed on every device, why the end user have to lunch an application just to see the time. That was the time it made me think about the existing clock applications and how it can be improved to fit in to the people’s life.

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QR clock is unreadable by humans and computers alike


The clock is a perfect technology. For just a few dollars, you can buy a digital wristwatch and chronometer able to keep extremely accurate time for years without winding a spring or replacing a battery. Anything ‘improvement’ on the design of a clock only makes it harder to read, a feature exploited by the very 1337 binary clocks we see from time to time. [Ch00f] decided it was time to give way to the march of progress and build a completely unreadable clock. He came up with a QR code clock that is unreadable by humans and cellphones alike.

The hardware is built around nine 8×8 LED matrix panels resulting in a 24 x 24 pixel display, perfect for displaying a 21 pixel square QR code. The LED drivers are a standard multiplexed affair, but this project really shines in the firmware department.

The microcontroller [Ch00f] used – an ATMega328 –…

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