This is the WORST Monitor Ever...ON PURPOSE!
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E-Paper Clock Displays Things In A Battery-Friendly Manner
Clock builds are a hacker staple, and many overflow with power-thirsty LEDs and network features. This build from [mattwach] takes quite the opposite approach, sipping away at its batteries thanks to an e-paper based design.
The build relies on a small Waveshare e-paper module which only requires power when the display is actually changing. When static, the display needs no electricity, and this helps save a great amount of power compared to OLED or LCD-based clocks.
An Atmega328p is the heart of the build, running off a 32.768 KHz clock crystal for a combination of precise timekeeping and low power draw. Time is ensured to be both precise and accurate thanks to a GPS module which allows the clock to sync to satellite time when powered up. It's a common way to sync clocks to a high-quality time source. Most of the time, though, the GPS is kept powered down to save the 30-100 mA that the module typically draws when in use.
Other features include a temperature, humidity, and pressure sensor, with ambient pressure graphed over time. There's also notification of sunrise and sunset times, along with the current phase of the moon. It's all wrapped up in a case tastefully manufactured using 3D printed parts and some wooden CNC-cut panels for a nice rustic look.
With the e-paper display and the microcontroller configured for low-power operation, the clock will run for around 6 months on four AAA cells. Overall, it's a nifty little clock that will provide the time, date, and other information without the need for an Internet connection. Video after the break.
Sunlight-Based Life Clock Predicts Your Darkest Hour
The past year has been quite a ride for everyone on Earth. But you never know which day is going to be your last, so you might as well live a little, eh? This clock doesn't actually know when you'll kick off, either. But just for fun, it predicts the number of years remaining until you go to that hackerspace in the sky by hazarding a guess that's based on your current age and the latest life expectancy tables. Don't like the outcome? It's completely randomized, so just push the button and get a set of numbers: the age you might die, and the percentage of life elapsed and remaining.
We love the design of this calculated doom clock, and it's quite simple inside -- an Arduino Pro Mini outputs the graph on an 2.9″ e-paper display, and both are powered with a 5.5 V solar panel. Just suction cup that puppy to the window and you'll get automatic updates about your impending demise on sunny days, and none on cloudy days.
Want a more realistic picture of your mortality? Here's a clock that counts down to your 80th birthday.
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