FYP Final Year Projects Videos

Students Project: Infrared remote control fan regulator

Students Project: Infrared remote control fan regulator

Infrared remote control fan regulator project by  NFC Institute of Engineering and Fertilizer Research students

Group members

  • Sohaib ud din ahmed
  • Muhammad rizwan
  • Awais karim
  • Ali aoun bukhari

Infrared remote control fan regulator


This project presented an easy design and execution of a remote controlled fan regulator. It enables the user to control a fan regulator from around 5 meters away.

Button on the remote can be used for controlling speed of the fan. There are three functional buttons at the remote; they are used for three different speeds. When a button was pressed on the remote control, the infrared light emitting diode then transmits the signal to the infrared sensor. The fan then produced an output in accordance to the action commanded by the remote control. The circuit was used to control the speed of the bracket fan for three levels. The system was broken down into simpler functional blocks namely; infra-red transmitter (remote control), infra-red receiver, micro controller, relays, and fan. Theories of design, construction, and equations were clearly expressed in this write-up which clarified how materials were used for the entire project.


We would like to express our profound gratitude to all who contributed to the success of this project, especially to mr.awais anjum for their constant guidance, encouragement, advice and support.

Most of all, our greatest appreciation goes to the almighty Allah for giving us life, strength and encouragement, right from the beginning and to the end of this project.


Remote control facilitates the operation of fan regulators around the home or office from a distance. It provides a system that is simple to understand and also to operate, a system that would be reliable and easy to maintain and durable irrespective of its usage. It adds more comfort to everyday living by removing the inconvenience of having to move around to operate a fan regulator.

The first remote control, called “lazy bones” was developed in 1950 by zenith Electronics Corporation (then known as zenith Radio Corporation). The device was developed quickly, and it was called “zenith space command”, the remote went into production in the fall of 1956, becoming the first practical wireless remote control device.

Today, remote control is a standard on electronic products, including vicars, cable and satellite boxes, digital video disc players and home audio players. In the year 2000, more than 99 percent of all TV set and 100 percent of all VCR and DVD players sold are equipped with remote controls.

The average individual these days probably picks up a remote control at least once or twice a day.

Basically, a remote control works in the following manner, a button is pressed. This completes a specific connection which produces a code line signal specific to that button. The transistor amplifies the signal and sends it to the led which translates the signal into infrared light. The sensor on the appliance detects the infrared light and reacts appropriately.

The remote control’s function is to wait for the user to press a key and then translate that into infrared light signals that are received by the receiving appliance.

The aim of this work is to design and construct a remote control for a fan regulator. The remote control device sends an infra-red beam, which is received by the infra-red sensor on the regulator and the speed of the fan is increased or decreased.

Problem statement

The remote control technology which is basically controlling an object from a distance provides flexible, effective and accident free way of controlling appliances or systems. It is inconvenient having to move around to change the setting of a fan regulator in accordance to the temperature of the room, hence, the need for a remote control technology.


The purpose of this project is to:

Design a remote control that is portable in size and a regulator (receiver) that responds only to the infra-red signal transmitted by the remote control. Control the speed of a bracket fan in three levels.

Significance of study

This work will enable people to operate their fans from a distance. For example, when feeling tired or lazy to get up from their couches and also whilst in bed one can easily reach out his/her remote to control or operate the fan within a specific distance. In other words, it will add more comfort to everyday living, as the inconvenience of having to move around to operate a fan regulator is removed. It will also help the aged and the disabled to control their fan without stress.

Principles of infrared operation

Since infrared (ir) remote controls use light, they require line of sight to operate the destination device. The signal can, however, be reflected by mirrors, just like any other light source. If operation is required where no line of sight is possible, for instance when controlling equipment in another room or installed in a cabinet, many brands of ir extenders are available for this on the market. Most of these have an ir receiver, picking up the ir signal and relaying it via radio waves to the remote part, which has an ir transmitter mimicking the original ir control.

Infrared receivers also tend to have a more or less limited operating angle, which mainly depends on the optical characteristics of the phototransistor. However, it is easy to increase the operating angle using a matte transparent object in front of the receiver.

Advantages of this project

  • this circuit is simple to use and efficient.
  • it is small in size.
  • it is cheap and hence very economical.
  • it can be assembled with ease.


Firstly we design a remote control, by using infrared transmitting IC pt2248. The circuit diagram and parts list I given below.


Parts list

  • pt 2248
  • 3 volt battery
  • switch
  • 47uf 16volts
  • transistor (c557)
  •  infrared led
  • led
  • resistance (180 ohms)
  • crystals (455 kHz)
  • diode (1n4148)
  • capacitors (120p)
  • touch buttons (10)

PCB design of the remote

Final diagram of our remote control

We make a receiver circuit of this remote system and attach it to a bracket fan winding. The circuit diagram of receiver and parts list is given below

Parts list

  • regulator 7805
  • diode 1n4007
  • battery 12 volts
  • capacitor 47uf 16 volts (3)
  • infrared receiver
  • green led
  • resistances 3.3k (as require)
  • resistance 39k (2)
  • capacitor 102p
  • transistor c 3198
  • resistance 47 ohm

Circuit diagram of controller circuit

Final pcb design

Final representation of the project

Project in action

Coding for atmel 89c51

#include <at89x51.h>

Void main (void)






While (1)







Else if(p3_1==1)





Else if(p3_2==1)





Else if(p3_3==1)







With the knowledge of new techniques in ‘electronics’ we are able to make our life more comfortable. One such application of electronics is used in this project. Remote controlled fan regulator is one of the applications of electronics to increase the facilities of life. It gives one the ability to control the speed of his/her fan from a distance within the specification.

The same circuit finds its use in many more applications. By this the intensity of light can be controlled using a remote. The intensity of light can be controlled in five levels from off position to maximum intensity possible.

So it finds, it use as a night lamp by keeping the intensity of lamp in low level. The circuit also finds its use for switching on and off any electronic circuitry. So it is very useful or a real help to old age and physically challenged people, since they can control the speed from the place where they are sitting.

We hope this project serves something good in our homes.


It is our wish for someone to take up this project and improve upon it. Especially, the packaging of the remote control which was not properly done due to lack of materials. It also requires very little or no maintenance, that is why its use should be encouraged in our homes.

This innovation can be a success only if people are made aware about its advantages and how user-friendly it is.

Download attachments: Infrared remote control fan regulator