USB bronze bell striking clock (with Arduino)

Step 3 Parts needed

-Arduino (mine is a "Duemilanove" with an ATMega 328 chip. Any other Arduino should do.
-Some 100mils breadboard to host the bronze bell "shield", as hardware to go on Arduino is called.
-One small 5V relay. This shall be hacked into an electric bell clapper.
-One low power NPN transistor. I used a 2SC1815 scrapped from a VCR.
-One 1000 Ohm resistor. Scrapped from same VCR.
-One small silicon diode (1N4148 is the most likely to be scrapped from anywhere)
-Strip of 100mils spaced Berg connector
-Small/medium/large/very large bronze bell. Depends on the relay (clapper) size and on how much annoying you want this rig to be. The clapper should be easily removable, better if its end inside the bell is threaded.
-A suitably long screw to fit the thread inside the bell
-Some thin steel wire for the clapper
-Cyanoacrylate or equivalent fast drying, strong glue
-Small nut and bolt to complete the clapper
-Tools : pliers, small cutters, solder
-Black/coloured paper and paper glue if you want to add a little finesse.
-You'll also need a PC running Arduino developers kit, available for free at http://arduino.cc and Processing developers kit available for free at http://processing.org
-USB cable

In the picture  the electronic components. The orange relay is not the one I finally used.