Arduino Projects

Connecting TM1637 4x7 Segment Display to Arduino

http://tronixstuff.com/2014/12/01/tutorial-using-ds1307-and-ds3231-real-time-clock-modules-with-arduino/

DS3231 RTC Clock Using Non-Rechargeable Batteries

DS3231 RTC Clock with Display

http://www.instructables.com/id/Real-time-clock-using-DS3231-EASY/step3/The-code/

Library

http://www.rinkydinkelectronics.com/library.php?id=73

HC-SR04 UltraSonic Distance Sensor with TM1637 Display

https://codebender.cc/sketch:212841#Distance%20Sensor%20TM1637.ino