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ABSTRACT
Remote controlled Fan Regulator is one of the applications of electronics to increase the facilities of life. Fan is one of the unavoidable Electronic equipment in our day today life. It has become essential element without which people can’t lead a smooth life. The presence of a fan in a house or office is not now considered as a luxury on the other hand it is included in the basic requirement. The uses of new electronic theories have been put down by expertise to increase the facilities given by the existing appliance. Here the facility of ordinary fan is increased by the making it controlled by a remote.
In remote controlled fan regulator we can regulate the speed of the fan by using a remote. Here the variation in the firing angle of triac is used for regulating the speed.
Any button on the remote can be used for controlling speed of the fan. Using this circuit, we can change the speed of the fan from our couch or bed. This circuit is used for controlling the speed of the fan in 5 levels. This innovation can be a success only if people are made aware about its advantages and how user-friendly it is. The circuit can be used to regulate the intensity of light. This innovation finds its use mainly to help old age people who don’t want to walk in order to control the speed of fan. It also finds its use of somebody wants to change the speed while sleeping.
INTRODUCTION
A circuit that allows total control over your equipments without having to move around is a revolutionary concept. Total control over the speed of the fan is a boon to many. This product brings to you this very concept.
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 cheap and affordable, a reliable and easy to maintain system of remote control and durable system irrespective of usage. It adds more comfort to everyday living by removing the inconvenience of having to move around to operate a fan regulator. The system seeks to develop a system that is cost effective while not undermining the need for efficient working.
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 VCRs, 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 Morse 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 carrier frequency of such infrared signals is typically around 36kHz.
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.
One of the primary objectives of an engineer is to endeavor to deliver the best product or the most efficient services at the lowest cost to the end user. The system was found to meet the expected results.
BLOCK DIAGRAM DESCRIPTION
Infrared Receiver Module
Infrared receiver module is used for receiving the signals transmitted by the remote control.
Here, TSOP 1738 is used as infrared receiver Module. It is capable of receiving signals up to 38 KHz.
Monostable Multivibrator
A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. A monostable multivibrator, as its name indicates, has a stable state and a quasi-stable state. An external trigger must be applied to change from the stable state to the quasi-stable state.
Here, two NE 555 ICs are wired as monostable multivibrators. The trigger to the first multivibrator is the signals from the infrared receiver module. This multivibrator is used to delay the clock pulse of the decade counter. The second multivibrator is triggered by the opto coupler.
Decade Counter
In digital logic and computing, a counter is a device which stores (and sometimes displays) the number of times a particular event or process has occurred, often in relationship to a clock signal. Decade counter is a counter that counts through 10 states. It is also known as a mod-10 counter.
Here, CD 4017 is used as decade counter. Here actually ten outputs are there from which five are used (Q0 to Q4), Q5 is not used and Q6 is used to reset. The output of monostable multivibrator(IC1) is used to delay the clock pulse of the decade counter.