PCB:
Electronic circuits in schools and industry are 
        normally manufactured through the use of PCBs (Printed Circuit Boards). 
        The boards are made from glass reinforced plastic with copper tracks in 
        the place of wires. Components are fixed in position by drilling 
        holes through the board, locating the components and then soldering them 
  in place. The copper tracks link the components together 
        forming a circuit.
                                           
 
The two diagrams below show the track side of a PCB (normally the 
        underneath side) and the component side (normally the top side) of the 
        same circuit. The relay and integrated circuit are ready to be placed in 
        position and soldered.
Hardwork Can Never Ever Fails...
Best Luck....
 
 
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