March 3, 2021

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This Slimline Word Clock Uses Laser Etching to Keep Things Simple

Judging by the tips we get, it seems like the popularity of word clocks has perhaps started falling off lately. But back at peak word clock, we were seeing dozens of designs, some better than others. This simple but classy word clock seems to benefit from all that prior art, making the design just about as simple as it can get while still looking great.

The main tool for [t0mg]’s build is a laser cutter, which is a great choice for keeping the design simple. The tricky part of word clocks is getting the “word search” matrix executed cleanly, and we’ve seen everything from laser-cut wood to inkjet prints, and even commercially produced PCBs, used for the job. [t0mg] opted instead to spray paint a piece of glass and etch away the characters with the laser, which results in superb text quality. Etching the underside of the glass also has the advantage of protecting the paint layer while giving the finished clock a glossy face that really looks nice. Under the template lie layers of MDF that hold the Neopixel strips and act as light guides, while an ESP32 and RTC perform timekeeping and LED-driving duties. [t0mg] finished off the clock with a nice web interface to set the clock, change the colors, and perform maintenance functions. The video below shows the software in use.

We really think this clock looks great, and for those with access to a laser cutter, it seems like a great way to go about building your own.