2.1.3 transistor (transistor). Transistor is a semiconductor device that can control the flow of electrons. Use function Signal amplifier power supply, on/off signal, control voltage, the electrical signal, or to mix fixed (modulate) etc. Operation of the transistor with the control valve is working with the incoming electrical signal to adjust the size of the outbound prepaid electricity coming from the power supply.Transistor consists of a semiconductor material, with at least three electrical connectors in order to connect to the circuit. External Voltage or current input to the transistor pair of terminals, there will be a result of changes in the current flowing through the transistor, another pair of terminals in because the energy that is controlled (output) is higher than the energy that is used in the control (input) transistor can extend the signal. Some of the transistor current is made up of many separate, but there are also found embedded in the circuit Panel.2.1.4 the resistance or the Sisters (resistor). It is a type of electrical device that has the ability to resist the flow of electricity. Made by wire resistance, or charcoal, carbon, etc., that is, if it has a lot of resistance. Electric current that flows through it.
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