LCD-based QR clock

new-take-on-qr-clock

Here’s a new take on the QR clock concept that uses an LCD display. The concept comes from the work [ch00f] put into his two versions of a QR clock (both of which used LED arrays). The time of day is encoded using the Quick Response Code standard. This version generates a new code each second which encapsulates date, hour, minute, and second information. If you look at the image on the left you’ll notice the code is not centered. Take a look at the video after the break and you’ll see that’s because it’s bouncing around the LCD like a screensaver. Watch a little longer and you’ll see the psychedelic effects shown in the image on the right.

A PIC32 is driving the display. It’s connected to a DCF77 radio module which feeds the system atomic clock data. The color plasma effects are used to show when the device has locked onto the radio signal.

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Making a QR clock bigger, cheaper, and better

LEDs

With the massive response and blog cred from his QR Code clock, [ch00f] felt it was time to step up his game and update his design to a proper commercial product. His new QR clock is bigger, brighter, cheaper, and in every way better than the old version, but these improvements came at a cost.

The LED matrices [ch00f] used in his earlier, smaller version weren’t very aesthetically pleasing. He wanted the lights to shine a brilliant white, and also be somewhat attractive when not illuminated. The 8×8 LED arrays [ch00f] picked up from Futurlec had a disgusting yellow coating on each LED that turned light emitted by the blue LEDs inside to a brilliant white. This simply wouldn’t do for a commercial product with [ch00f]‘s name on it, so he turned to the one place in the universe where everything was for sale: alibaba.com.

After some trials and tribulations with component manufacturers in China, [ch00f] had the perfect LED matrix; not too expensive, very good quality control, and something that looked really good when both unpowered and illuminated.

Now that his boards are being spun up, [ch00f] hopes to sell his QR clock on Tindie. Each 24×24 LED matrix should cost less than $100, a pretty good deal if you ask us. He’d like to know if anyone out there has any feature requests, to which we can only say he should get rid of the PCB border. Tiling a few of these displays and controlling them via serial would be much cooler than a QR Code clock.

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