The most popular RTC for the Arduino is the DS1307. However, it does have some drawbacks, the most notable of which is that its operating voltage is 5v, ... 0 comments on “ MAX DS1339 RTC real time ...

He’s made a real-time-clock module controlled by a rubidium frequency standard, ... and GPS module together with an ATMega32U4 miniature Arduino-compatible board and an LCD display.

[Kenneth Finnegan] quenches our clock-a-day compulsion with his Arduino based binary timepiece. The clock uses a 5×7 LED matrix as a display and shows month, day, and time. He sourced a DS3232… ...

Maker Michael Klements has built a unique electromechanical clock using a little Arduino hardware, code, and 28 servos, ... The Arduino Uno reads the time from a DS1302 real-time clock (RTC) ...

Adapter for Arduino Micro/Nano, RTC real time clock and NPS nixie power supply modules are included. Before buying, read project description.” Watch this video on YouTube .

The idea here is to use a cheap clock from IKEA, wire in a bunch of LEDs, connect and Arduino, and then use the 1Sheeld to trigger color changes depending on the traffic time between two points.

The Arduino uses latitude and longitude to help decide when to click on the lights, so it's incredibly accurate. Otherwise, the build just includes an on/off switch, a Tiny RTC, a time adjustment ...