Introduction: ~12VAC to 12VDC Converter Circuit
That's my individual idea :)
Step 1: Parts:
1N4007 diodes x4
470uF 25V electrolytic capacitor x1
stabilizer 7812 x1
fuse 150mA 250V or 600mA 250V x1
fuse socket x1
transformer ~220-230V 50Hz or 60Hz to ~12V/100mA x1
switch x1