An LED is the device shown above. Besides red, they can also be yellow, green and blue. The letters LED stand for Light Emitting Diode.
http://www.iguanalabs.com/1stled.htm
Depicts the step-by-step process by which the transistors of an integrated circuit are made.
http://www.virlab.virginia.edu/VL/Semiconductor_science/IC_process/IC_process.htm
explanation of the assembling process of a sample circuit.
http://www.hobby-elec.org/e_sampl.htm
Resistors, Coils, Capacitors, Printed Wiring Boards, Diodes, Relays, Transistors, Wiring materials, Integrated Circuits
http://www.hobby-elec.org/e_parts.htm
convenient tools needed when you make electronic circuits.
http://www.hobby-elec.org/e_tool.htm
procedure of the electronic circuits making
http://www.hobby-elec.org/e_process.htm