RE: REMOTE CONTROL HOME APPLIANCES
||REMOTE CONTROL HOME APPLIANCES
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“REMOTE CONTOL FOR HOME APPLIANCE” provides a unique method to control high powered devices easily. It could be implemented in firms, hospitals as well as homes to ensure safe wireless control over devices.
Thanks to the advancement in the field of electronics, where most of the manually controlled systems are getting replaced with sophisticated electronic circuits. Specially designed electronic circuits can be developed control high powered as well as low powered devices. The technology used here is the infrared wave communication.
1.1. INTRODUCTION TO INFRARED WAVE:
The discovery of infrared radiation is ascribed to William Herschel, the astronomer, in the early 19th century. Herschel published his results in 1800 before the Royal Society of London. Herschel used a prism to refract light from the sun and detected the infrared, beyond the red part of the spectrum, through an increase in the temperature recorded on a thermometer. He was surprised at the result and called them "Calorific Rays". The term 'Infrared' did not appear until late in the 19th century.
Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red light to violet. "Near infrared" light is closest in wavelength to visible light and "far infrared" is closer to the microwave region of the electromagnetic spectrum. The longer, far infrared wavelengths are about the size of a pin head and the shorter, near infrared ones are the size of cells, or are microscopic.
1.2. INTRODUCTION TO IR REMOTE CONTROL SYSTEM:
In modern electronics, electronics remote control system is well known system. Infrared remote control kits available in the market are quite expensive and it some one wishes to assemble one, their IC’s may not be easily available. More over for simple ON-OFF function such as controlling a lamp or fan we do not need very complex circuit.
The IR remote control circuit using photodiode and phototransistor sensor suffer from major drawback of being affected by ambient light and a very low range.The IR remote control circuit described here can be used for any simple ON-OFF function. This system has memories application than other remote control system.
. T.V REMOTE CONTROL
A remote control is a component of an electronics device, most commonly a television set, used for operating the television device wirelessly from a short line-of-sight distance.
The remote control can be contracted to remote or controller. It is known by many other names as well, such as converter clicker, flipper, the tuner, the changer, or the button. Commonly, remote controls are Consumer IR devices used to issue commands from a distance to televisions or other consumer electronics such as stereo systems, DVD players and dimmers. Remote controls for these devices are usually small wireless handheld objects with an array of buttons for adjusting various settings such as television channel, track number, and volume. In fact, for the majority of modern devices with this kind of control, the remote contains all the function controls while the controlled device itself only has a handful of essential primary controls. Most of these remotes communicate to their respective devices via infrared (IR) signals and a few via radio signals.
DECADE COUNTER IC 4017 :-
CD4017 is a 5 stage divide by 10 Johnson counter with 10 decoded outputs and a carry out bit. This counter is cleared to these zero count, by a logical “1” on their reset line. These counters are advanced on the positive edge of the clock signal when the clock enable signal is in the logical “0” state.