BASICS OF

ELECTRONICS

CONTENTS

Theory topics • Power supply

• Sensors (LDR,TDR,IR)

• Current Driver

• Relay

• Motors

• Wireless (DTMF)

• Introduction to microcontroller

Practical Demonstrations• Power supply

• Automatic light dimmer & Temperature indicator & Object Sensing

• 230v controlling using relay

• Motor controlling using (DTMF)

POWER SUPPLY

Power Supply

Block diagram of power supply

Circuit diagram

TRANSFORMER

DIODE

Positive Output Negative Output

Regulator IC

Filter Capacitor

Adapters

SENSORS

&

COMPONENTS

LDR

LDR

TDR

IR Sensor pair

IR Sensor pair

IR Sensor pair

PNP NPN

TRANSISTER

LED

GENERAL

ELEMENTS

Soldering

Relays

Relay

Relay

Relay Application

CURRENT DRIVER

CURRENT DRIVER

IC L293D

It is a motor driver IC.

It has internal clamp diodes

Output current 600mA per channel.

Supply Voltage range of 4.5 V to 36 V.

Dual Half H-Bridge Drive.

Driver IC

Driver IC

Electric motor: machine that converts electricity into a

mechanical motion (rotations).

MOTORS TYPES

STEPPER MOTOR SERVO MOTOR DC MOTOR

Gear DC MOTOR

Practical Demo • Power supply

• Automatic light dimmer & Temperature

indicator & Object Sensing

• 230v controlling using relay

• Motor controlling using (DTMF)

WIRELESS

TSOP

RF 434 Module

DTMF

DTMF IC 8870

ADC

8870 FUNCTIONAL TABLE

How DTMF signal can be Received ???

TWO WAYS TO Rx DTMF

1.DTMF signal can be taken from speaker and using microphone to convert sound waves to electrical signals …… tedious work.

2.The other way is through earphone jack

Embedded System

MICROCONTROLLERS

Generalized Block Diagram of Simple Robot

Thank U !