This good-looking clock appears to be made out of a block of wood with LED digits floating underneath. In reality, it is a block of PLA plastic covered with wood veneer (well, [androkavo] calls it veneer, but we think it might just be a contact paper or vinyl with a wood pattern). It makes for a striking effect, and we can think of other projects that might make use of the technique, especially since the wood surface looks much more finished than the usual 3D-printed part.
You can see a video of the clock in operation below. The clock circuit itself is nothing exceptional. Just a MAX7218 LED driver and a display along with an STM32 ARM processor. The clock has a DHT22 temperature and humidity sensor, as well as a speaker for an alarm.
Setting the clock is a breeze since it offers a WiFi interface, thanks to an ESP8266, of course. There’s also a vibration sensor to cut off the alarm. You could change the software to suit if you wanted to handle things differently. For example, we might make the vibration sensor snooze, and require the user to access the web page to turn the alarm off just to make sure we were really awake.
Contact paper is available in lots of finishes, so this technique could turn a 3D-printed box into a box with a solid color, a marble pattern, or even simulated carbon fiber.