It doesn't take long for Arduino users to discover the analogue inputs, and one example of this is the basic VU meter by Instructables user "siemenwaters". By simply measuring the audio signals presented to analogue pins A2 and A4, the levels are displayed using custom characters on a standard HD44780-interface LCD module. It's easy to make and can be visually-appaling (and also a nice match for the spectrum analyser from last week). Here's a quick demonstration:
For the Arduino sketch and notes, visit the project page. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
Instead of building your own LCD module onto a breadboard, save time and move forward with the Freetronics LCD & Keypad shield which contains a bright 16x2 character LCD and five buttons that can be read from only one analog input pin: