How do you ensure a millennial will always be late? Get them an analog wristwatch! Horrible, cringey dad jokes aside, most of us rely on digital clocks these days. Heck, it’s possible you don’t even own a dedicated clock or watch, and you just use your smartphone like a normal person. But, digital doesn’t always mean “easy to read.” If you want to make sure you’re the only one who can tell the time, you could build Tobias’ BCD Binary Wrist Watch.
Binary clocks and wristwatches are hardly new, and geeks have been using them to prove their dedication to the lifestyle for decades. But, this is one of the most stylish ones we’ve ever seen. The shape is reminiscent of a classic Casio F-91W, and the sleek design is very attractive. It has three functions that can be displayed on the surface-mount LEDs: time, date, and stopwatch.
All of the circuitry is built into a custom-designed PCB, and runs off of an ATtiny1617 microcontroller. That’s ideal because it consumes very little power. Tobias used capacitive touch buttons built into the PCB to keep the design as minimal as possible, and to keep the BOM (Bill of Materials) tight. The PCB and components fit nicely into a compact 3D-printed case, and that’s topped off with a good ol’ fashioned nylon wrist band. Of course, you’re still going to need to learn how to read the time in binary.