/products/raspberry-pi/b/blog/posts/piface-relay-tricks-metronome-playing-middle-aGordon of WiringPi and drogon.net has created a nifty metronome demo program for the PiFace: www.youtube.com/watch Here's the source code: And the installation instructions: As you'll notice in the above instructions, Gordon has figur...en-USTelligent Community 12