Remote Control Light Circuit Using 555 Timer 4q7243

Mapúa Institute of Technology School of EE-ECE-E Logic Circuits and Switching Theory Laboratory COE117L / B4

Remote Control Light Circuit Diagram Using 555 Timer

By

GARCIA, Kendrick Dale M. GO, Ynehl Carlo S. GOZO, Angelo D. INGATAN, Paul Augustine S. JIMENEZ, Sheena Mariz B.

March 17, 2016

ACKNOWLEDGEMENT

1

We are grateful to our God Almighty who deserve unending praises and thanksgiving, who has been always there to guide us in the completion of this project, and who bestowed upon us all the countless blessings and gift of wisdom, strength, intelligence and integrity that made us able to accomplish this research project successfully. We would like to express our sincere gratitude To Engr. Lorelei Roda, who has been an excellent adviser for this course, for sharing us the knowledge that would be relevant now and in our future someday and for providing us the all learning experiences. Her guidance and assistance helped us all the time of doing this project. We would also like to thank our families, especially our beloved parents who give their unending love, who have always been there beside us, who have been the source of our encouragement and strength in studying, who give their moral and financial to us until the end. We are also thankful to our classmates and friends for their participation, suggestions and words of encouragement to make it all possible. And most especially to each member of the group who gave their time to cooperate, and shared their knowledge, skills and talents for the success of this project.

Table of Contents

2

TITLE PAGE

i

ACKNOWLEDGEMENT

ii

TABLE OF CONTENTS

iii

ABSTRACT

iv

Chapter 1: DESIGN BACKGROUND AND INTRODUCTION Project Setting Statement of the Problem

1

1 Objectives of the Project 2 Scope and Delimitation Definition of

2

3-4 Chapter 2: DESIGN METHODOLOGY AND PROCEDURES Project Development Procedures 5-7 Chapter 3: TESTING, PRESENTATION, AND INTERPRETATION OF DATA Purpose of the Test 8 Procedures to Follow in Conducting Test 8-9 Tabular Presentation Of Gathered Data 9 Analysis and Discussion of Gathered Data

9

Chapter 4: CONCLUSION AND RECOMMENDATION Conclusion Recommendation

10 10

APPENDIX 3

Data Sheets 11 Pictures

11

ABSTRACT You may wonder if it’s possible to control a light using a remote controller. In this circuit, it’ll enable us to turn ON and OFF a light with a remote control. Ever wonder how the television turns on and off just with a push of button via infrared transmitter. A light that can be turned off with just a remote will be very convenient for domestic purposes and also it can be used for various technological adaptations especially in wireless controlling devices.

4

5

Chapter 1

Project Setting There are lots of devices and appliances such as television set, DVD player, or other home appliance that use remote control. Remote control is convenient for it could be used for wireless operations from a specific range of distance and can allow operation of devices that are out of convenient reach for direct operation of controls.

Statement of the Problem In our world today, countless products of technology are running around. Almost everything is designed to make even a simple work be easier for a man. Making devices being remotely controlled is a great idea for it is a big help in many aspects. It is very convenient to have a remotely controlled light for domestic purposes and it can be used for various technological adaptations especially in wireless controlling devices.

The Objectives of the Project



To be able to conduct an activity that can enhance knowledge



about ic(s) 555 timer and D flip-flops. To prove that an infrared transmitter can be used to turn on and



off a light. To understand how the logic works within the integrated circuits.

The Scopes and Delimitations 

We have made use of TSOP, an IR receiver which detects the IR rays from the remote. NE555 is the next important part which produces a clock pulse for toggling the D flip flop. The relay helps to connect any electrical devices to the circuit and you can



control any electrical equipment, not only a light. You must need regulated power supply of 5 volt to do this circuit because TSOP requires 5v. Its voltage should not exceed 5V (This limitation is possible if ever the transformer component is removed from the package.)

Definition of

TSOP (THIN SMALL OUTLINE PACKAGE) -

TSOP 1738 is the Infrared receiver Module widely used in

remote control applications including TV. It is a versatile sensor that receives the coded Infrared pulses from the transmitter and directs the functions of the device. TSOP 1738 sensor is designed to receive IR rays pulsating in the 38 KHz and hence the number 1738. It has a circuitry inside a black colored filter case that prevents the effect of sunlight and other lights on the Photodiode present inside. There is a PIN Photodide inside the module which is the receiver of the Infrared rays from the transmitter. In addition to the Photodiode, there are signal amplifiers, AGC (Automatic Gain Control), and output driver inside the module.

555 Timer -

consist

of

basically

two

comparators,

a

flip-flop,

a

discharge transistor, and a resistive voltage divider. Flipflop is a two-state device whose output that is dependent on input signals can be either a high (set S) or low (reset R) voltage level. Resistive voltage divider is used to set the voltage comparator levels.

7474 D-type Flip-Flops

-

This

device

contains

two

independent

positive-edge-

triggered D-type flip-flops with complementary outputs. The information on the D input is accepted by the flip-flops on the positive going edge of the clock pulse. The triggering occurs at a voltage level and is not directly related to the transition time of the rising edge of the clock. The data on the D input may be changed while the clock is LOW or HIGH without affecting the outputs as long as the data setup and hold times are not violated. A LOW logic level on the preset or clear inputs will set or reset the outputs regardless of the logic levels of the other inputs. Relay -

This is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. It has a coil of wire inside that becomes a temporary magnet when electricity flows through it.

Chapter 2

Project Development Procedures

The project comprises of the basic theories in logic circuits that we have used in the past experiments such as D-type flip-flops, as well as the 555 timer. The circuit contains IC 7474, IC 555, 230v to 6v step down transformer, TSOP IR receiver, BC 187 transistor, diode 1N4007x5, resistors(200k, 100k), relay(6V) and capacitors ( 1uF, 470uF). For the power source, unregulated DC voltage of 6 V is needed. It is connected to the input of 7805 IC which is a three-terminal (input, GND, output) IC regulator with fixed positive output voltage of 5 V DC. It is necessary to use 7805 IC because TSOP and the 7474 IC that will be used require 5 V maximum. The 7805 IC’s output is then connected to the VCC of TSOP. TSOP senses or receives the coded Infrared (38 kHz) pulses from the transmitter or remote and directs the function of the device. For remote circuit, we have made as an extra in case of a problem with the usage of ordinary remotes to switch on and off the supply for the LED. It normally produces an output of 5 V without receiving IR rays. When the module receives IR rays, it sinks the current and the output turns low to zero volts. The output sensor turns high and low alternately. The speed of the transition depends on the bandwidth of the coded pulses.

Its output serves as the trigger voltage input in the pin 2 of 555 IC. Normally its output is 0 V, provided that voltage at the 2nd pin must be greater than 1/3Vcc. When the trigger voltage goes below 1/3 Vcc, the flip-flop inside the 555 IC sets, and the output then jumps to its high level which is 5 V. When the external capacitor connected at pin 6 exceeds 2/3 Vcc, it will reset the flip-flop which in turn switches the output back to its low level (0 V). The output maintains its high level for a period of time determined by the time constant of the RC, and then it returns to 0 V again. The D-flip flop7474 is wired as Toggle mode. The output of 555 is used as the clock generator to the flip-flop. Clk ↓»0 ↑»1 ↑»1

D X 0 1

Q Q 0 1

Q’ Q’

Description Memory

1 0

no change Reset Q » 0 Set Q » 1

When it get a clock pulse, output goes to high and remain in that state until it get next pulse. On receiving next pulse, output goes to low and remain in that state till the next pulse. Output of 7474 is fed to base terminal of BC 187 which is driver transistor. When its base voltage is high, current will flow through the load which is the relay. Relay will energize only when the base voltage of BC 187 is high and connects the 230v AC supply to the bulb or light. Components List

230 V to 6 V step down transformer 7805 voltage regulator TSOP IR receiver IC 555 IC 7474 BC 187 Transistor Diode 1N4007x5 Resistors (220KΩ, 100Ω) Relay (6V) Capacitor (1μF, 470μF) The Schematic Diagram

Chapter 3

Purpose Of The Test

The purpose of this test is to check if the remote control circuit is working properly or if the desired output is attained. Testing the project is necessary to check the errors beforehand and for assurance of the project’s quality. Conducting a test corrects the discrepancy between the actual data gathered and expected outputs.

Procedures To Follow In Conducting A Test The following procedures/steps are required to properly test the project. 1. Check all the connections using continuity test in order to detect open connections. 2. Provide proper grounding and supply for the ICs and for the whole circuit.

Steps in conducting the test: 1. To test if the relay is working, just plug the circuit into a +220V AC source. This package has a transformer that converts the right amount of voltage for the circuit to work. 2. The default state of the output indicator is normally ON. 3. With the remote (that holds the transmitter circuit), press the push-to-make switch to turn OFF or ON the light bulb which can be controlled at a certain maximum range of distance from 3 to 5 meters.

Tabular Presentation Of Gathered Data

Input (remote button) Initial State (Present) Push push again push again

Output (light) OFF ON OFF ON

ON OFF ON OFF

Analysis and Discussion of Gathered Data The output is dependent on what is the present state of the LED. If the LED is normally ON, when the remote button is pressed, it will turn OFF. If the LED is normally OFF, when the remote button is pressed, it will turn ON. When it the circuit get a clock pulse that is indicated by pressing of remote control, the output changes state and remain in that state until it get next pulse. On receiving next pulse output change again and remain in that state till the next pulse. This process will continue. Chapter 4

Conclusion In this project, it has been successfully completed with the results being acceptable. The Remote Control Light Circuit Diagram Using 555 Timer could work using different kinds of remote control that send digitally-coded pulses of infrared radiation. The maximum range

of distance that the prototype could function is satisfiable. The desired operation is obtained.

Recommendation You can definitely expand the main idea of this project to be applicable in other devices, not only in bulbs but also in other devices that require small DC voltage or AC voltage (by means of the relay) to operate. The relay could be used to drive even the bigger devices that require bigger current to operate.

APPENDIX A. Data Sheets of the different components or materials of the group used in the prototype - SEE OTHER PDF DOCUMENTS

B. Pictures of the actual or scaled model of the project prototype

Remote Control Light Circuit

Transmitter Circuit (Remote)