Eric Rogers] is a radar-systems engineer who just happens ... There are some bugs in the system right now. The Arduino has something of an ADHD problem, losing interesting and going to sleep ...

In the real world, missile systems use advanced radars ... To supply targeting data for the launcher, an Arduino Uno uses an ultrasonic sensor pair mounted atop a servo. As the servo rotates ...

If so, Make Projects user Clement Storck built a simple Arduino powered notification system that sends him a text message and an email with a photo every time someone rings the doorbell.