introduction to basic of electronics

7/25/2019 introduction to basic of electronics

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Introduction

To

SIC

ELECTRONICS


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What is EMBEDDED SYSTEM?

Systems to control, monitor or assist the

operation of equipment, machinery or plant.

The term "Embedded" reflects the fact that

they are an integral part of the system they

control.


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Basic electronics

Advance electronics

Software and programming


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EMBEDDED SYSTEM:-


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BASIC ELECTRONICS

MAIN COMPONENTS USED IN BASIC ELECTRONICS:-

RESISTOR

POTENTIOMETER(VARIABLE RESISTOR)

CAPACITOR

DIODE

VOLTAGE REGULATOR

CRYSTAL OSCILLATOR

LED


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RESISTOR

To oppose the flow of electrons ( current).

The symbols are shown below

Resistance is measured in units called Ohm.

1000 ohms is shown as 1k

Resistors can be broadly of two types

Fixed Resistors

Variable Resistors


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FIXED RESISTOR

A fixed resistor is one for which the value of its

resistance is specified and cannot be varied in

general

Different type of fixed resistor:-

1. Carbon film resistor

2. Metal film resistor

3. Ceramic resistor

4. Wire wound resistor


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VARIABLE RESISTOR(POTENTIOMETER)


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CONNECTION OF RESISTOR

SERIES CONNECTION

R total=R1+R2

PARALLEL CONNECTION

R Total = R 1* R 2 / (R 1 + R 2 )


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CAPACITOR

The function of the capacitor is to store electric

charge or in effect electrical energy.

It is very useful as a filter, and for passing ACand blocking DC.

The symbol is


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TYPES OF CAPACITORS

ELECTROLYTIC CAPACITORS:

The important characteristic of electrolytic capacitors is

that they have polarity.

Mainly this type of capacitor is used as a ripple filter in apower supply circuit.

Electrolytic capacitors range in value from about 1F to

thousands of F.


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CERAMIC CAPACITORS

Ceramic capacitors are constructed with materials

such as titanium and barium used as the dielectric.

Internally, these capacitors are not constructed as a

coil, so they can be used in high frequency applications.


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DIODE

Diode is a two-terminal electronic component that

conducts electric current in only one direction.

The most common function of a diode is to allow an

electric current to pass in one direction (called thediode's forwarddirection), while blocking current in

the opposite direction (the reverse direction).


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VOLTAGE REGULATOR(7805)


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VOLTAGE REGULATOR

The voltage regulator IC maintains the output

voltage at a constant value.

7805 is a voltage regulator integrated circuit.

7805 provides +5V regulated power supply

Pin

No

Function Name

1 Input voltage (5V-18V) Input2 Ground (0V) Ground

3 Regulated output; 5V (4.8V-5.2V) Output


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CRYSTAL OSCILLATOR

Crystals used in electronic applications consist

of a quartz wafer held between two metal

plates and housed in a package as shown in

Fig


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L.E.D.

LED stands for Light Emitting Diode.


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LIGHT EMITTING DIODE

It is type of diode i.e. if we connect it in

forward bias it works but in reverse bias it

never works.


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POWER SUPPLY CIRCUIT

We can make power supply using basic

electronics components i.e. rectifier circuit.

introduction to basic of electronics

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