2012 concludes, let’s look back at all the cool Arduino projects that we’ve featured on the site. There were a ton! We’ve been big fans of the Arduino since its release, and there arehundreds of posts on the blog as a testament to this love affair–with more to come in 2013! Go head this out!!! http://blog.makezine.com/2012/12/28/best-of-arduino/
Connect an amplified listener with an in-car FM transmitter, and you've got a wireless bug. Place the circuit in a hollowed-out book with the microphone concealed by the dust cover, and you've got a super-sneaky covert listening device! Tune in via a FM radio receiver set to the correct frequency, and you'll be able to hear through walls.