Building the rectifier
The rectifier turns the AC output into useful DC power. You need 4 diodes for this. Snip the legs on two of the to about 1cm on the side with the black line, and three to about 1cm on the side without the black line. Bend the long pieces over to connected them all together (see photos). Solder them all together, then solder the three wires to where the two diodes are connected together. When you've finished the rectifier together, you can add the output wires. I used about a meter of bell wire, you can adjust this to suit your needs.