Wireless IR Switch_1

8/14/2019 Wireless IR Switch_1

http://slidepdf.com/reader/full/wireless-ir-switch1 1/37

INTRODUCTION

Now a day, everyone wants to control their appliance wirelessly (i.e. remote control).

Here is a simple tested and inexpensive remote control switch utilizing reading

available components.

Here is a Simple Infrared controlled Switch. It can be operated using the IR remote.

The Load can be any AC operated device which can be connected to the relay. The

load turns on for three minutes then goes off. It can be used to switch on the lamp in

the room.



BLOCK DIAGRAM

Transmitter:

Reciever:



CIRCUIT DIAGRAM

Transmitter:

Receiver:



COMPONENTS REQUIRED

IR SwitchComponent Transmitter Circuit Cost

Refrence Value Qnt.

Capacitor C1 100uF 1

Resistor R1 330E 1

Diode D1 IR LED 1

IC U1 7805 1

Misc. BT1(Battery & connector wire) 9V 1

SW1 Push Sw. 1

CONNECTOR & WIRE 2PIN 1

PCB 2"x2" 1

Stud 2

HardSheet 3"x3" 1

Screue 1" 2

Total

Reciver Circuit

Component Refrence Value Qnt. Cost

Resistor R1 1M 1

R2 180E 1

R3 330E 1

R4 10K 1

RV1 10K 1

Diode D1 Photo Diode 1

D2,D3,D4,D5,D6 1N4148 5

D7 1N4007 1

LED1,LED2 RED 2

Transistor Q1 BC547 1

IC U1 LM358 1

U2 4017 1

Misc. BT1(Battery & connector wire) 9V 1

K1 (Relay) 12V 1

P1TerminalBlock 1

IC BASE 8PIN 1

IC BASE 16PIN 1

PCB 4"x4" 1

CONNECTOR & WIRE 2PIN 1Stud 4



Hard Sheet A5 1

Screue 1" 4

Total



COMPONENT DESCRIPTION

LM358

The LM358 is a great, easy-to-use dual-channel opamp. Opamps have so many

applications we figured we should probably carry at least one in a DIP package.

LM358 applications include transducer amplifiers, DC gain blocks and all the

conventional opamp circuits.

If you're looking for a good, standard opamp the LM358 should fill most of your

needs. It can handle a supply of 3-32VDC and source up to 20mA per channel. This

opamp is great if you need to operate two individual opamps from a single power

supply. Comes in an 8-pin DIP package.

Features:

Two internally compensated op-amps

Internally frequency compensated for unity gain

Large DC voltage gain: 100 dB

Wide bandwidth (unity gain): 1 MHz (temperature compensated)

Single supply: 3V to 32V

or dual supplies: 1.5V to ?16V



INFRA RED DIODES (IR LED’S/IR SENSORS)/ PHOTODIODE

The main difference between LED and IR LED is that IR LED emits Infrared

Radiations, which we cannot see by our visible eye. The second difference is that IR

LED takes a lot of current and damage fastly than LED's. We can use IRLED with

photo diode as a sensor, which makes less prone to external light effects compared

to LDR+LED combination.

NOTE: IR LED becomes heated fast. Remember that IR LED always creates too

much problems, most of the time it won't lit, that means the voltage across IR LED

should be>2V for it to lit('lit' means produce IR radiations).

IR transmitter emits invisible light, detected by only mobile camera.i.e you can use

mobile camera to check whether IR transmitter is working or not.

PHOTODIODE:

A photodiode is a type of photodetector capable of

converting IR light into either current or voltage, depending

upon the mode of operation. A photodiode is designed to

operate in reverse bias.

Note: Resistance of the IR receiver reduces as IR radiations fall on it.

How to find polarity of an IR Tx. /Rx.?

The criteria to find the polarity of an ir sensor are simple as that of an LED. There are

2 methods:

Positive leg of the IR sensor is longer than the negative one.



Negative terminal is thicker inside the plastic covering.

Connections for IR Transmitter:

Transmitter is connected as a simple LED as it also emits light, though it is invisible.

It is connected in series with a 100Ω/330Ω resistance, as small as possible and

given voltage supply across its ends. The resistance attached with this IR Led is kept

small enough to increase its transmission power.

Connections for IR receiver:

IR receiver is connected in series with a 1MΩ resistance and connecting the supply

across its ends. The output is taken from the center of the sensor and resistance

with respect to ground.

YOU CAN MAKE FOLLOWING ROBOTS USING IR SENSORS

Obstacle detector

Door Interrupter

Autonomous Line follower

Robot Autonomous

Edge detector robot

Autonomous Obstacle detector robot

Autonomous Wall follower robot, etc.



BATTERY

Battery is a device consisting of one or more

electrochemical cells that convert stored

chemical energy into electrical energy.

There are two types of batteries:

Primary batteries (disposable batteries),

which are designed to be used once and

discarded,

Secondary batteries (rechargeable

batteries), which are designed to be

recharged and used multiple times.

Battery Ratings:

Batteries carry all sorts of ratings and specifications. Traditionally, the two most

important specifications are per-cell voltage and amp-hour current.

VOLTAGE

The voltage rating of a battery is fairly straightforward. If the cell is rated for 1.5 V,

when new, it puts out a bit more. Over time it will drop down to the rate value, give or

take. That “give or take” is more important than you may think because few batteries

actually deliver their rated voltage throughout their life span. Most rechargeable

batteries are recharged 20 to 30 percent higher than their specified rating.

Most batteries are considered dead when their power level reaches 80 percent of

their rated voltage. That is, if the cell is rated at 6 V, it’s considered dead when it puts

out only 4.8 V.

CAPACITY

The capacity of a battery is rated as amp-hour current. This is the amount of power,

in amps or milliamps, the battery can deliver over a specified period of time.

Symbol:



RESISTOR

FIXED AND VARIABLE

DESCRIPTION

A resistor is an electrical component, which has been manufacture

with a specified amount of resistance. The resistors can conduct

current in both the directions. The resistors may be connected in an

electric circuit without concern for lead polarization. The resistors are

used mainly for two purposes, namely controlling the flow of electric

current and providing desired amounts of voltage in electric in electric

or electronic circuits.

Resistor specifications

The resistors are specified in terms of their resistance values, tolerance

power rating and thermal stability.

Tolerance is the allowed variation permitted in the normal or marred

value or the resistor.

Power Rating of a resistor is given by the maximum wattage it can

dissipate, without excessive heating.

The power rating is proportional to the square of a current,

therefore current must not be higher than its safe value. If the current

exceeds the safe value, the resistance will burn out.

Thermal Stability of a resistor is indicated by the temperature

coefficient specification, which is usually expressed in parts per million

per degree centigrade (+ ppm/C).

The smaller value of temperature coefficient will have less

variation in the resistance value.

TYPES OF RESISTOR,

FIXED RESISTOR

The fixed resistors are those whose do not change with the variation in applied voltage,

temperature and light intensity. Such resistors are available in various shapes and sizes.

Ordering Number

RESISTOR

Packaging

RESISTOR



The fixed resistors are of the following types:

CARBON COMPOSITE MATERIAL

These resistors are made by mixing carbon powder and insulating binders to

produce the desired value of resistance. The resulting resistance values are within + 10% of

the desired value. The resistors with + 5% tolerance are also obtained through special

techniques.

CARBON FILM RESISTOR

These resistors are cheaper than carbon composition resistors. They have good

stability, wide operating frequency range and low noise.

METAL FILM RESISTOR

There resistors are made by depositing a very thin layer of metal on a ceramic or

glass rod. The metal film is spiral cut to the desired resistance. These resistors have

tolerances ranging from + 0.025% to 2%, of the desired value.

WIRE WOUND RESISTOR

There resistors are made by winding resistive wire such as nichrome (a nicklet-

chromium alloy) on a ceramic film. The wire is then coated with an isolative material, which

is either a vitreous enamel or silicon ceramic material. The wire-wound resistor are costly as

compared to other types of resistor. But these resistor have excellent electrical properties

such as low noise, good time stability and good overload (high current) characteristics. The

wire-wound resistors are suitable for use in d.c. and audio-frequency applications. They

cannot be used in high frequency applications due to the inductance and capacitance

present in the resistor.



VARIABLE RESISTOR

There resistor, like fixed resistor, are used to control flow and

provide desired amounts of voltage in electric circuits. But unlike fixed

resistors, the resistance value of variable linear resistors can be varied

from 0 to a specified value.

The variable resistors are of the following three types.

Variable wire-wound

There resistor are made in chrome wire wound on a

ceramic core and covered with an isolative coating. An

adjustable tap b rides the exposed wire which makes

electrical contact with the wire

Potentiometer

Its outer terminals are fixed and the middle terminal is

variable. The variation is provided by a wiper connected to a

control shaft. When a control shaft is moved, the wiper moves

over a resistive element. This movement provides a

continuous variation in resistance between the middle

terminal and either outside terminal.

Trimmer

These are used in electronic circuits to trim the circuit to

the required operating conditions by inserting a small screw

driver into a slot and turning one or more times.

The materials used in the construction of a trimmer

are carbon composition, carbon film cermet and wire. The

trimmers are available for resistance values ranging from 50

to 5M \, with a power rating from 1/4 to 3/4 watt.

RESISTOR COLORE CODING

Ordering Number

RESISTOR

Packaging



±

101st

Band X

3rd

Band

2nd

Band 4th

Band



Industrial Type Designation:

In industrial type designation, the first two digits

represent the significant figure and third digit gives

the number of zeros to follow.

For resistance value less than 10 ohms, letter G

substituted in place of third digit signifies a

decimal multiplier of 0.1 (example 27G=2.7ohms).

Another digit following the resistance value

code gives percentage tolerance.

5 ±5% 1 ±10% 2 ±20%

The wattage rating is expressed by two letters

preceding the resistance value code.

BB

1/8 watt CB

1/4 watt

EB1/2 watt GB1 watt

HB2 watt GM3 watt

HM4 watt

The operational temperature range is 0ºC to +70ºC for commercial grade and -25ºC to +85ºC for

industrial grade components.

CB 272 5

2.7K, ±5%, ¼ watt

EB 564 1

560K, ±10%, 1/2watt

BB 27G 5

2.7ohm, ±5%, 1/8watt

GM 101 1

100 ohm, ±10%, 3watt

GB 105 2

1M,±20%, 1 watt



Capacitor

Function

Capacitors store electric charge. They are used with resistors in timing circuit because it takes time

for a capacitor to fill with charge. They are used to smooth varying DC supplies by acting as a

reservoir of charge. They are also used in filter circuits because capacitors easily pass AC (changing)

signals but they block DC (constant) signals.

Capacitance

This is a measure of a capacitor's ability to store charge. A large capacitance means that more charge

can be stored. Capacitance is measured in farads, symbol F. However 1F is very large, so prefixes are

used to show the smaller values.

Three prefixes (multipliers) are used, µ (micro), n (nano) and p (pico):

µ means 10-6

(millionth), so 1000000µF = 1F

n means 10-9

(thousand-millionth), so 1000nF = 1µF

p means 10-12

(million-millionth), so 1000pF = 1nF

Capacitor values can be very difficult to find because there are many types of capacitor with

different labelling systems!

Polarised capacitors (large values, 1µF +)



Examples: Circuit symbol:

Electrolytic Capacitors

Electrolytic capacitors are polarised and they must be connected the correct way round, at least one

of their leads will be marked + or -. They are not damaged by heat when soldering.

There are two designs of electrolytic capacitors; axial where the leads are attached to each end

(220µF in picture) and radial where both leads are at the same end (10µF in picture). Radial

capacitors tend to be a little smaller and they stand upright on the circuit board.

It is easy to find the value of electrolytic capacitors because they are clearly printed with their

capacitance and voltage rating. The voltage rating can be quite low (6V for example) and it should

always be checked when selecting an electrolytic capacitor. If the project parts list does not specify a

voltage, choose a capacitor with a rating which is greater than the project's power supply voltage.

25V is a sensible minimum for most battery circuits.

Tantalum Bead Capacitors



Tantalum bead capacitors are polarised and have low voltage ratings like electrolytic capacitors.

They are expensive but very small, so they are used where a large capacitance is needed in a small

size. Modern tantalum bead capacitors are printed with their capacitance, voltage and polarity in

full. However older ones use a colour-code system which has two stripes (for the two digits) and a

spot of colour for the number of zeros to give the value in µF. The standard colour code is used, but

for the spot, grey is used to mean × 0.01 and white means × 0.1 so that values of less than 10µF can

be shown. A third colour stripe near the leads shows the voltage (yellow 6.3V, black 10V, green 16V,

blue 20V, grey 25V, white 30V, pink 35V). The positive (+) lead is to the right when the spot is facing

you: 'when the spot is in sight, the positive is to the right'.

For example: blue, grey, black spot means 68µF

For example: blue, grey, white spot means 6.8µF

For example: blue, grey, grey spot means 0.68µF

Unpolarised capacitors (small values, up to 1µF)

Examples:



Circuit symbol:

Small value capacitors are unpolarised and may be connected either way round. They are not

damaged by heat when soldering, except for one unusual type (polystyrene). They have high voltage

ratings of at least 50V, usually 250V or so. It can be difficult to find the values of these small

capacitors because there are many types of them and several different labelling systems Many small

value capacitors have their value printed but without a multiplier, so you need to use experience to

work out what the multiplier should be

For example 0.1 means 0.1µF = 100nF.

Sometimes the multiplier is used in place of the decimal point:

For example: 4n7 means 4.7nF.

Capacitor Number Code

A number code is often used on small capacitors where printing is difficult:

the 1st number is the 1st digit,

the 2nd number is the 2nd digit,

the 3rd number is the number of zeros to give the capacitance in pF.

Ignore any letters - they just indicate tolerance and voltage rating.

For example: 102 means 1000pF = 1nF (not 102pF!)

For example: 472J means 4700pF = 4.7nF (J means 5% tolerance).



Capacitor Colour Code

A colour code was used on polyester capacitors for many years. It is now obsolete, but of course

there are many still around. The colours should be read like the resistor code, the top three colour

bands giving the value in pF. Ignore the 4th band (tolerance) and 5th band (voltage rating).

For example:

brown, black, orange means 10000pF = 10nF = 0.01µF.

Note that there are no gaps between the colour bands, so 2 identical bands actually

appear as a wide band.

For example:

wide red, yellow means 220nF = 0.22µF.

Polystyrene Capacitors

Colour Code

Colour Number

Black 0

Brown 1

Red 2

Orange 3

Yellow 4

Green 5

Blue 6

Violet 7

Grey 8

White 9



This type is rarely used now. Their value (in pF) is normally printed without units. Polystyrene

capacitors can be damaged by heat when soldering (it melts the polystyrene!) so you should use a

heat sink (such as a crocodile clip). Clip the heat sink to the lead between the capacitor and the joint.

Real capacitor values (the E3 and E6 series)

You may have noticed that capacitors are not available with every possible value, for example 22µF

and 47µF are readily available, but 25µF and 50µF are not! Why is this? Imagine that you decided to

make capacitors every 10µF giving 10, 20, 30, 40, 50 and so on. That seems fine, but what happens

when you reach 1000? It would be pointless to make 1000, 1010, 1020, 1030 and so on because for

these values 10 is a very small difference, too small to be noticeable in most circuits and capacitors

cannot be made with that accuracy. To produce a sensible range of capacitor values you need to

increase the size of the 'step' as the value increases. The standard capacitor values are based on this

idea and they form a series which follows the same pattern for every multiple of ten.TheE3 series (3

values for each multiple of ten)

10, 22, 47, ... then it continues 100, 220, 470, 1000, 2200, 4700, 10000 etc.

Notice how the step size increases as the value increases (values roughly double each time).The E6

series (6 values for each multiple of ten)

10, 15, 22, 33, 47, 68, ... then it continues 100, 150, 220, 330, 470, 680, 1000 etc.

Notice how this is the E3 series with an extra value in the gaps.

The E3 series is the one most frequently used for capacitors because many types cannot be made

with very accurate values.

Variable capacitors



Variable capacitors are mostly used in radio tuning circuits and they

are sometimes called 'tuning capacitors'. They have very small

capacitance values, typically between 100pF and 500pF

(100pF = 0.0001µF). The type illustrated usually has trimmers built in

(for making small adjustments - see below) as well as the main

variable capacitor.

Many variable capacitors have very short spindles which are not

suitable for the standard knobs used for variable resistors and rotary

switches. It would be wise to check that a suitable knob is available

before ordering a variable capacitor. Variable capacitors are not

normally used in timing circuits because their capacitance is too small to be practical and the range

of values available is very limited. Instead timing circuits use a fixed capacitor and a variable resistor

if it is necessary to vary the time period.

Trimmer capacitors

Variable Capacitor Symbol

Variable Capacitor

Trimmer Capacitor Symbol



Trimmer capacitors (trimmers) are miniature variable capacitors.

They are designed to be mounted directly onto the circuit board and

adjusted only when the circuit is built.

A small screwdriver or similar tool is required to adjust trimmers.

The process of adjusting them requires patience because the

presence of your hand and the tool will slightly change the

capacitance of the circuit in the region of the trimmer!

Trimmer capacitors are only available with very small capacitances, normally less than 100pF. It is

impossible to reduce their capacitance to zero, so they are usually specified by their minimum and

maximum values, for example 2-10pF.

Trimmer Capacitor



LED / IR LED

LIGHT-EMITTING DIODE / INFRARED LIGHT-EMITTING DIODE

DESCRIPTION

Light-emitting diodes (LEDs) use compound semiconductor materials

such as gallium arsenide or indium phosphide. The relevant symbol is

illustrated in Figure. When forward current passes, light is emitted

from the junction.

The color of the light depends on the semiconductor material

used for the diode and the brightness is approximately proportional to

the size of forward current.

As indicated by its name, the LED is a diode that emits light. A

diode is a device that allows current to flow in only one direction.

Almost any two conductive materials will form a diode when placed in

contact with each other.

When electricity is passed through the diode the atoms in one

material (within the semiconductor chip) are excited to a higher energy

level. The atoms in that first material have too much energy and needto release that energy. The energy is then released as the atoms shed

electrons to the other material within the chip. During this energy

release light is created. The color of the light from the LED is a function

of the ingredients (materials) and recipes (processes) that make up the

chip.

Applications

Outdoor Displays

Optical Indicators

Backlighting

Marker Lights

Ordering Number

LED 3mm, LED 5mm,

IR LED

Packaging

LED 3mm / LED 5mm



LIST OF MATERIAL USED FOR LED MANUFACTURING AND COLOR OF LED

NOTE: - Abbreviations for

materials: Al, aluminum;As, arsenic; C, carbon; Ga,

gallium; In, indium; N,

nitrogen; P, phosphorus; Si,

silicon. Oblique stroke

indicates one

semiconductor on a

substrate of another; for

example GaAsP/GaAs

means gallium –arsenic –

phosphorus on gallium

arsenide.



APPLICATION CIRCUIT DIAGRAM

1. Basic circuit diagram

2. Rectifier Circuit



PCB LAYOUT

Transmitter:

Receiver:



PCB MANUFACTURING PROCESS

PCB:

A printed circuit board (PCB) mechanically supports and electrically connects

electronic components using conductive tracks, pads and other features etched

from copper sheets laminated onto a non-conductive substrate.

Advantages of PCB:

The size of component assembly is reduced with a corresponding

decrease in weight.

Quantity production can be achieved at lower unit cost.

Component wiring and assembly can be mechanized.

Circuit characteristics can be maintained without introducing variation in

inter-circuit capacitance.

They ensure a high level of repeatability and offer uniformity of electrical

characteristics from assembly to assembly.

Inspection time is reduced because printed circuitry eliminates the

probability of error.

Printed wiring personnel require minimal technical skills and training.

PCB Design and Fabrication Process:

The major steps in the PCB design and fabrication process are as follows:

1. Design and test the prototype circuit—by hand;

2. Capture the circuit’s schematic—using OrCAD Capture or similar software;



3. Perform the physical layout of the circuit—using OrCAD Layout or similar

software;

4. Fabricate, populate and test the PCB—done by ECE shop personnel or similar

personnel.

1) Prototyping

With a basic idea in mind, a circuit schematic is developed and analyzed to

ensure the desired functionality and performance. When creating a circuit for

PCB production, a designer would also select specific components at this time.

Commonly, the next step is to prototype and to test the circuit. It is also possible

to use the schematic capture software along with related software to simulate the

circuit without building it on a prototyping board.

2) Schematic Capture

Schematic capture software comes in several forms. Schematic capture allows

the PCB designer to create an electronic schematic. This electronic schematic

contains more information than its paper relatives. For example, every part



symbol in Capture contains information telling what footprint the symbol is

associated with. (Footprints are the symbols used in layout software to define the

physical design of each component.)

Capture parts symbols are used in a symbolic manner. Thus, the part symbol on

Capture’s screen does not show what the actual physical component looks like. It

does allow the designer to connect all the components in a circuit and to test the

workings of the circuit by exporting files to other software. For our purpose,

Capture provides the starting point for creating a physical layout in layout

software.

3) Physical Layout

A blueprint of a house tells the size of lumber to use, as well as the dimensions of

the living room wall and the dimensions of the window cut into it. It gives all the

physical information necessary to build the house. Physical layout software can

be thought of as a “blueprint” for a PCB.

There are several programs available for doing physical layout. The basic

building blocks used in Layout are footprints. A footprint contains all the physical

dimensions related to a particular part. For example, a 14-pin dip footprint defines

where each of the 14 drill holes are to be located, as well as associated

information, such as text defining the part number of the component.

In Layout the footprints of the various parts are placed and then routed. Routing

refers to defining where the copper interconnects in the circuit will be located.

Interconnects are coppe paths on the surface of the PCB that connect one pin to

another. Interconnects are also known a “routes” or “traces”.



4) Physical Creation of PCB

PREPARATION OF SCREEN:

Nylon bolting cloth (Silk screen cloth) is stretched and attached to a wooden

frame. Photosensitive chemical (silcot-6) and ammonium bicarbonate is spread

on cloth and dried in total darkness. The screen is exposed to UV light and is

developed in water.

PRINTING:

The screen is placed on suitable copper laminated sheet on copper side and

circuit black printing ink (acid resistant paint) is spread on it. After printing the

PCB should be allowed to dry for at least 10 hrs. in a dust proof chamber.

ETCHING:

The removal of excess copper on the copper laminated PCB apart from the

printed circuit is known as etching. Generally PCB is placed in F3C13 solution

and kept for one hour.

DRILLING:

Under this operation drilling should be done as per circuit lay with the suitable drill

and high speed machine. Drilling should always be done from copper side to

avoid possibility of coming out of copper circuit and chipping out of Bakelite.

GREEN MAKING:

It is done with special epoxy paint and special thinner is requited for cleaning the

screen. It provides as better and also prevents frequency overlapping between

the tacks at high frequency operation.



TINNING:

It is an electroplating process (tin plating) done to increases the conductivity of

the conducting medium and to avoid oxidizing effect.

COMPONENT MOUNTING:

All components are mounted at their respective position as per the components

layout. Proper precautions should be taken during mounting process.

SOLDERING:

Soldering is a process in which two or more metal items are joined together by

melting and flowing a filler metal (solder) into the joint, the filler metal having a

lower melting point than the workpiece.

A soldered connection ensures metal continuity. The soldering process involves:

Melting of the flux which in turn removes the oxide films on the metal to be

soldered. Melting the solder which removes the impurities. The solder partially

dissolve of the metal in the connection. The solder cools and fuses wit the metal.

The soldering techniques involves knowledge of:

Soldering iron

Soldering wire

Soldering procedure

Replacing components

Knowledge of good and bad soldering joints.

Disordering techniques



Soldering iron is an essential tool for soldering. A. Soldering iron should

give sufficient heat a melt solder by heat transfer when the iron tip is

applied to a connection to be soldered. The selection of the soldering iron

can be made as regard to its tips size shape and wattage.

The soldering material is used to join together two or more metals at

temperatures below their melting point. The solder alloy consists of Lead

(37%) and Tin (63%). The continuous connection between two metal joint

is made by solder materials.

Flux is a material used to aid soldering process. Flux is needed to scratch

away the small film of oxide on the surface of metals to be soldered.

SOLDERING PROCEDURE

The soldering procedure involves selection of soldering iron cleaning of components

to be soldered and cleaning of the PCB to be soldered. The soldering iron should be

selected according to the job and should be powerful enough to provide heat. The tip

of the soldering iron should be selected as per the space available for soldering. The

component that has to be soldered should be properly bent and its leads should

properly inserted in the PCB. Before. If one has already identified the fault

component, then one should not try to remove or desolder the component. The

components should simply be cut and taken out.

DESOLDERING TECHNIQUES

By using a disordering wick : Disordering wick is made of fine copper wire mesh.

When this is applied to the heated components, the molten solder gets attached to

the wire mesh by capillary action.



By using a disordering pump: Disordering pump has a suction pump. The nozzle of

the disordering pump is kept to the heated component. The molten solder is sucked

by a spring action. Insertion in the PCB, the lead should be properly cleaned. After

component has been inserted it can be soldered. The oxide on the PCB can be

removed by using flux, sandpaper.

REPLACEMENT OF COMPONENT

In case of single sided PCB, the component to be removed can be disordered with

the help of iron and flux. The only precaution that has to be taken is that track should

not break while removing. In case of Through Hole PCB, care has the to be taken so

that component while removing does not damaged the Through Hole. In this case

the component is soldered on one side and the lead flows through the hole to the

other sides, so disordering and removing becomes very difficult and required

practice.



ADVANTAGES & DISADVANTAGES

ADVANTAGES

No false triggering.

Low Cost.

It provides digital output.

Blind spot monitors

DISADVANTAGES

Range is limited to 1feet (can be increase by using TSOP1738)

Work on lone of sight.



APPLICATIONS

Car Parking System

Intruder Sensor

Object Sensor



References

www.google.com

www.datasheetcatlog.com

www.intractable.com

www.electronics4u.com

http://www.google.com/


http://www.datasheetcatlog.com/


http://www.intractable.com/


http://www.electronics4u.com/






Wireless IR Switch_1

Documents

Transcript of Wireless IR Switch_1