Mobile Phone Repair
MOBILE REPAIR ENGINEER DEMO SLIDES
This Presentation Contains Demo Slides of the Mobile Repairing Course
Electricity - What is it?
General definition of electricity
Electricity is a general term that refers to a variety of phenomena resulting from
The presence electrons.
Flow of electric charge.
Generation of Electricity
• Electric current generation - whether from fossil fuels, nuclear, renewable fuels, or other sources is usually based on the:
Introduction to diode
– A diode is the simplest possible semiconductor device, A diode allows current to flow in one direction but not the other. You may have seen turnstiles at a stadium or a subway station that let people go through in only one direction. A diode is a one-way turnstile for electrons.
– When you put N-type and P-type silicon together as shown in this diagram, you get a very interesting phenomenon that gives a diode its unique properties.
– Even though N-type silicon by itself is a conductor, and P-type silicon by itself is also a conductor, the combination shown in the diagram does not conduct any electricity. The negative electrons in the N-type silicon get attracted to the positive terminal of the battery. The positive holes in the Ptype silicon get attracted to the negative terminal of the battery. No current flows across the junction because the holes and the electrons are each moving in the wrong direction.
Frequency Modulation (FM)
Simple Basic Digital Logic Gates
– Simple digital logic gates can be made by combining transistors, diodes and resistors. – Example of a Diode-Resistor Logic (DRL) AND gate and a Diode Transistor Logic (DTL) NAND gate.
Uses of Oscilloscopes
– Oscilloscopes are commonly used to observe the exact wave shape of an electrical signal. – In addition to the amplitude of the signal, an oscilloscope can show distortion, the time between two events and relative timing of two related signals.
– Oscilloscopes are used in the
This Presentation Contains Demo Slides of the Mobile Repairing Course
Electricity - What is it?
General definition of electricity
Electricity is a general term that refers to a variety of phenomena resulting from
The presence electrons.
Flow of electric charge.
Generation of Electricity
• Electric current generation - whether from fossil fuels, nuclear, renewable fuels, or other sources is usually based on the:
Introduction to diode
– A diode is the simplest possible semiconductor device, A diode allows current to flow in one direction but not the other. You may have seen turnstiles at a stadium or a subway station that let people go through in only one direction. A diode is a one-way turnstile for electrons.
– When you put N-type and P-type silicon together as shown in this diagram, you get a very interesting phenomenon that gives a diode its unique properties.
– Even though N-type silicon by itself is a conductor, and P-type silicon by itself is also a conductor, the combination shown in the diagram does not conduct any electricity. The negative electrons in the N-type silicon get attracted to the positive terminal of the battery. The positive holes in the Ptype silicon get attracted to the negative terminal of the battery. No current flows across the junction because the holes and the electrons are each moving in the wrong direction.
Frequency Modulation (FM)
Simple Basic Digital Logic Gates
– Simple digital logic gates can be made by combining transistors, diodes and resistors. – Example of a Diode-Resistor Logic (DRL) AND gate and a Diode Transistor Logic (DTL) NAND gate.
Uses of Oscilloscopes
– Oscilloscopes are commonly used to observe the exact wave shape of an electrical signal. – In addition to the amplitude of the signal, an oscilloscope can show distortion, the time between two events and relative timing of two related signals.
– Oscilloscopes are used in the