For other interesting ARDUINO PROJECTS here
So far in this series, we’ve had a diverse look at how Arduino can interact with a range of real-world devices from servo motors to ultrasonic range finders, TVs to humidity sensors. Now we'll see if we could get the Arduino to make a few sounds. We’ll actually do a bit better than that — we’ll look at the importance of pulse width modulation (PWM) to microcontrollers by building our own digital audio player called Auduino.
The two versions of our Auduino audio player. The Ethernet shield version (bottom) gives better results with more flash cards.