USB bronze bell striking clock (with Arduino)

Step 7 The clapper

This is the final picture of the modified relay: first remove the cover from the realy with a pair a small cutters. Be careful not to damage the bobbin core. Depending on the internal physical implementation of the relay, tha moving anchor may move horizontally or vertically: the best thing is to try it with a battery. It also helps testing the relay coil for damage.
The relay pictured is not the one I finally used because I ended up gluing the anchor to the coil...
The clapper is built from a small chunck of thin steel wire. On one end a hook holds a small screw, the other end is L-shaped to be glued on the relay's anchor.
Test the assembly again when the glue has dried - it should take a couple of minutes. Don't overdo with the glue !