Arduino Real Time Alarm Clock DS3231 with TM1638. Arduino Clock with Battery backup (real time clock), Time, Date, Alarm, Temperature, TM1638 seven segment module output and input, Display Sleep mode.

First Method In the Arduino IDE, navigate to Sketch > Include Library > Manage Libraries Then the Library Manager will open and you will find a list of libraries that are already installed or ready ...

Residential-grade commercial alarm systems are good at a few things but terrible at others, like keeping pace with telephone technology. So what to do when a switch to VOIP renders your alarm system ...