For the most part, the build is what you would expect: a 16×8 LED Matrix display driven by a TLC5920 LED driver, with an Arduino that uses a DS1307 RTC (real-time clock) with a coin cell ...

so whipped up a neat design using analog meters to display the time. The build relies on that old stalwart, the Arduino Uno, to run the show. It’s hooked up to a DS3231 real-time clock module so ...

Read more: Battery Brands Ranked From Worst To Best The Arduino Uno Rev3 is ... WiFi's onboard Real Time Clock (RTC). While the main supply can power the RTC, you may need to use a separate ...