Power Supply

Welcome to electroz blog, thank you for visiting my blog, now I will discuss about how to make power supply, to reduce voltage from 220 volts AC to 3 volts DC - 12 volts DC.  where Power Supply is required for various types of instruments that require low voltage, cooler pad, such as to prevent the notebook because the heat is too long and will also reduce the work load a notebook for use at home. A device power supply that will be made this very simple because does not require too many components and is very easy to make goods that  required are: 
1.  1 ampere transformator
2.  Electrolyte Condenser 1000 micro f /25 volt 
3. 1 ampere bridge diode 
4. 2 meter cable high voltage current required to rotate three fan cooler pad is 9 volt. Equipment that is needed is tin solder and a screwdriver, pliers. solder our first heat and then we find the location of low voltage transformers that are needed, namely at the point 0 volt and 9 volt AC current, the second point is connect to input diode foot bridge, and put both feet out diode bridge connected to electrolyte condenser, which flow diode output this is changed to DC current, then we install the power cable voltage to 220 volt transformer to the point 0 volt and 220 volt. live pair of output currents transformer earlier with a 9 volt cable to connect the cable cooler pad. it's easy right? try survived thanks.