GPS-synchronized-clock

GPS-synchronized-clock

Simple clock that always shows the correct time. GPS reception required.

Selection between summer time and winter time must be done manually.

Only a few components and easy to build even on a breadboard

Built around an ATMEGA328P chip or board

To fit the glass dome, use an Arduino Mini Pro 5V version 

or 

ATMEGA328P chip supply voltage 5V

The LED matrix is not 3.3V compatible.

When using the ATMEGA328P chip, use the following settings:

Bootloader: "No bootloader"

Clock: "Internal 8MHz"

No impact on your finances

Ideal for Arduino beginners

Serial communication

I2C communication

SPI communication

Analog input

Digital input

Interrupt subroutine

Use of a 2-dimensional array

Nice end result

For the program and some building tips see:

https://github.com/thieu-b55/GPS-synchronized-clock