Full tutorial on video streaming and motion detecting doorbell made with Arduino. via instructables
Knock knock. Who’s there? A motion detecting smart doorbell that senses when someone is near the door! It will use a webcam to detect motion. When activated, it will play a greeting and then take a photo and email it to someone to let them know who is at the door.
In this tutorial, you will learn how to install and setup a webcam, a USB sound card, a microphone, and a speaker.