Time

Alphanumeric GPS Wall Clock

January 26, 2015

This is a GPS controlled clock - a clock you truly never have to set! Using GPS and some formulas, we figure out what day of the week and if we are in or out of daylight savings time.

DeadOn RTC Breakout Hookup Guide

October 6, 2016

An introduction to the DS3234 real-time clock (RTC), example wiring diagrams, and an Arduino library!

Qwiic Real Time Clock Module (RV-1805) Hookup Guide

May 31, 2018

Find out what time it is, even after the power's been out on your project for a while with the Qwiic Real Time Clock (RTC) module.

Real Time Clock Module Hookup Guide

October 6, 2016

A quick introduction to the DS1307 RTC module and a hookup guide for the SparkFun Breakout.

Old Tutorials

Looking for the old, archived tutorials? Head on over to the archived tutorials on the main SparkFun site.
Please be aware that the tutorials you find there are no longer actively maintained.