Will you please help me to design a power supply of 12v and 1amp with calculations for selection of right components ?

           As above mentioned i would like to have the basic knowledge regarding the designing power supply.
Here i want the selection criteria for all components of power supply .I would like to have basics of the
calculations or formula regarding selection of values of capacitors used in design.
         Kindly help me please!!!!

rickharris5 years ago
http://www.zen22142.zen.co.uk/Circuits/Power/alarm_psu.htm

http://circuit-diagram.net/power-supply-schematic

http://www.phoenixcomputerlabs.com/All-About-Mixers/7812-7912.html

the other details aren't hard to find.
Homework ?