Do you have a hard time waking up like I do? TK takes us though a simple Arduino setup that creates a sunrise alarm to help you wake up to a simulated sunrise.

The goal of this module is to teach students about the properties of sound and computing distance with an ultrasonic sensor. The program can also be used to measure the relative distance. This module ...

Ring didn't do anything particularly innovative with its Alarm Security Kit, but this inexpensive DIY system stands out because of its simplicity.