INDEXIntroduction Circuit diagram Working principleDescriptionComparision with otherApplicationDisadvantagesReference

IntroductionWe know now a days technology so

improving that workload of man is decrease.On sitting on sofa we operate T.V, Fan ,A.C.& other equipments.

On same fashion we construct here receiving circuit which operate on Infrared remote.

Any remote can be used for this circuit there is no restriction that use specific remote.

We can operate any device by remote provided that this circuit must placed in that device.

The range of remote is 36fts in this range when you push the button device gets on-off according to our requirement.

Circuit diagram

C7

0.1uf

C4

0.1uf

C5 0.22uf0.01uf

C3

0.1uf

C8 2.2ufC6 100uf

C2 1uf

C1 100uf

R1

1k

R3

10k

R10

18k

R11

100k

R2

1k

R5

150k

R9

5.6k

R7

220k

R8

47ohm

R4

100k

Q1

bel187

123

IFRLED

D2

in4007

Q2

BC558

12

J7v+ v-

12

J8

relay

Q4

BC547

12345678 9

10

14

1615

131211

cd4027

1234

5678

u2

NE555R6

150k

C10 100uf1 2 3

u378L05

WORKINGThe remote control generates IR rays .Generated signals are received by IR module TSOP

1738.IR module has 3 pins,pin1 is connected to

ground,pin2 is connected to power supply,output is taken from pin3,c7 c8 are used to minimise effect of noise.

IC 555 is used to provide pulses to IC 4027 through transistor.

After getting pulse IC 4027 will generates logic high signal,which is further given to relay through transistor

Relay works as switch and after receiving signal from IC4027 ,it gets on if input is logic high and vise versa.

This signal is connected to load which can be on off depending on condition of relay.

IC CD-4027Pin diagram.

Functional diagram.

DESCRIPTION

The HEF4027B is a dual JK flip-flop which is edge-triggered and features independent set direct(SD), clear direct (CD), clock (CP) inputs and outputs(O,O). Data is accepted when CP is LOW, and transferredto the output on the positive-going edge of the clock. The active HIGH asynchronous clear-direct (CD) and set-direct(SD) are independent and override the J, K, and CP inputs.The outputs are buffered for best system performance.Schmitt-trigger action in the clock input makes the circuithighly tolerant to slower clock rise and fall times.

Circuit Diagram of 7805

DescriptionBy using voltage regulator IC we can obtain

excellent regulation (in order 0.01%) with good stability and reliability with overvoltage protection.

The input capacitor C1 is used if regulator is located far from power supply filter capacitor .It filters out effects of stray inductance of wire.

To improve transient response output capacitor C0 is used.

It utilizes common ground for input and output and dropout voltage 2v.

Output current up to 1A.Output voltage of 5,6,8,9,10v.Thermal overvoltage protection. Short circuit protection.Output transistor safe operating area

protection.

Specifications

555 timer IC

The 555 Timer IC is an integrated circuit (chip) implementing a variety of timer and multivibrator applications. The IC was designed by Hans R. Camenzind in 1970 and brought to market in 1971 by Signetics (later acquired by Philips). The original name was the SE555 (metal can)/NE555 (plastic DIP) and the part was described as "The IC Time Machine".[1] It has been claimed that the 555 gets its name from the three 5 kΩ resistors used in typical early implementations,[2] but Hans Camenzind has stated that the number was arbitrary.[3] The part is still in wide use, thanks to its ease of use, low price and good stability.

Depending on the manufacturer, the standard 555 package includes over 20 transistors, 2 diodes and 15 resistors on a silicon chip installed in an 8-pin mini dual-in-line package (DIP-8).[4] Variants available include the 556 (a 14-pin DIP combining two 555s on one chip), and the 558 (a 16-pin DIP combining four slightly modified 555s with DIS & THR connected internally, and TR falling edge sensitive instead of level sensitive).

Ultra-low power versions of the 555 are also available, such as the 7555 and TLC555.[5] The 7555 requires slightly different wiring using fewer external components and less power.

The 555 has three operating modes:Monostable mode: in this mode, the 555 functions as

a "one-shot". Applications include timers, missing pulse detection, bouncefree switches, touch switches, frequency divider, capacitance measurement, pulse-width modulation (PWM) etc

Astable - free running mode: the 555 can operate as an oscillator. Uses include LED and lamp flashers, pulse generation, logic clocks, tone generation, security alarms, pulse position modulation, etc.

Bistable mode or Schmitt trigger: the 555 can operate as a flip-flop, if the DIS pin is not connected and no capacitor is used. Uses include bouncefree latched switches, etc.

Nr. Name Purpose

1 GND Ground, low level (0 V)

2 TRIG A short pulse high-to-low on the trigger starts the timer

3 OUT During a timing interval, the output stays at +VCC

4 RESETA timing interval can be interrupted by applying a reset pulse to low (0 V)

5 CTRL Control voltage allows access to the internal voltage divider (2/3 VCC)

6 THRThe threshold at which the interval ends (it ends if the voltage at THR is at least 2/3 VCC)

7 DISConnected to a capacitor whose discharge time will influence the timing interval

8 V+, VCC The positive supply voltage which must be between 3 and 15 V

Relay

A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism, but other operating principles are also used. Relays find applications where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another.

Relays found extensive use in telephone exchanges and early computers to perform logical operations. A type of relay that can handle the high power required to directly drive an electric motor is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protection relays".

TSOP 1738DescriptionThe TSOP17.. – series are miniaturized receivers forinfrared remote control systems. PIN diode andpreamplifier are assembled on lead frame, the epoxypackage is designed as IR filter.The demodulated output signal can directly bedecoded by a microprocessor. TSOP17.. is thestandard IR remote control receiver series,

supportingall major transmission codes.

Description Component list

Part Description Quantity

CD4027 1 piece

IC 78L05 Voltage regulator 1 piece

IC NE555 1 piece

BC 547 transistor 1 piece

BC558 transistor 1 piece

BEL 187 transistor 1 piece

IN4007 Silicon diode 1 piece

Semiconductors:

Part Description Quantity

1K 2 pieces

10K 1 piece

100K 3pieces

150K 1 piece

220K 1 piece

47Ω 1 piece

5.6K 1piece

18K 1piece

Resistor:.

Part Description Quantity

100uf ,25v electrolyte 3pieces

1uf,50v electrolyte 1piece

0.1kpf ceramic 3pieces

2.2uf ,50v electrolyte 1piece

0.22kpf ceramic 1piece

0.01kpf ceramic 1piece

Capacitor:.

Miscellaneous:-

T.V sensor (TSOP 1738)

Relay 12v

LED

Comparision with other technologyThe IR remote control circuit described here can

be used for any on-off function.Advantage of it is that this circuit is absolutely free

from ambient light interference and control range of about 10 meters without use of any focusing lens.

Another main advantage of this circuit lies in fact that it can easily converted into multichannel remote control by simply changing output pin number that is connected to reset pin of IC 4027 and taking more outputs from corresponding output pins of IC 4027.

ApplicationIt is use for on /off the load ex. Fan ,Radio,

Lamp etc.It is used in space due to electromechanism.

DisadvantagesWhen any type of interfere is occurred at that

time output may be affected.Range of distance can not be increased

beyond specific limit.Sometimes sensor working affected by noise.