Download IR based intelligent Automatic washbasin / mirror lamp controller

IR based intelligent Automatic washbasin / mirror
lamp controller with water control
ABSTRCT:
Power supply:
Object Detection using IR light:
The basic idea is to send infra red light through IR-LEDs, which is then reflected
by any object in front of the sensor.
We use an IR emitter LED which emits infrared radiations. The radiations are
reflected by any object or obstacle in its path. IR has a property that it is reflected
by the white line and absorbed by the black surface. Using this principle we
construct a white line follower robot. A white line is drawn on a black surface. The
emitted IR is thus reflected back when sensor comes over a white surface; however
no IR is reflected back in case of black surface. The reflected IR is detected by an
For Details Contact: A.VINAY-9030333433, 0877-2261612
IR receiver photodiode. This is an electrical property of receiver photodiode which
is the fact that a photodiode produce a voltage difference across its leads when it is
subjected to light. When the IR is reflected by white surface the voltage drop
across the cathode of the receiver LED decreases.
We are going to use a very original technique: we are going to use another IRLED, to detect the IR light that was emitted from another LED of the exact same
type! As if it was a photo-cell, but with much lower output current. In other words,
the voltage generated by the LED's can't be - in any way - used to generate
electrical power from light, it can barely be detected. That‟s why as you will
notice in the schematic, we are going to use an Op-Amp (operational Amplifier) to
accurately detect very small voltage changes
Light-emitting diode:
A light-emitting diode (LED) is a semiconductor light source. LEDs are used
as indicator lamps in many devices and are increasingly used for other lighting.
Appearing as practical electronic components in 1962.early LEDs emitted low-
For Details Contact: A.VINAY-9030333433, 0877-2261612
intensity red light, but modern versions are available across the visible, ultraviolet,
and infrared wavelengths, with very high brightness.
When a light-emitting diode is switched on, electrons are able to recombine with
electron holes within the device, releasing energy in the form of photons. This
effect is called electroluminescence and the color of the light (corresponding to the
energy of the photon) is determined by the energy gap of the semiconductor. An
LED is often small in area (less than 1 mm2), and integrated optical components
may be used to shape its radiation pattern. LEDs present many advantages over
incandescent light sources including lower energy consumption, longer lifetime,
improved physical robustness, smaller size, and faster switching. However, LEDs
powerful enough for room lighting are relatively expensive and require more
precise current and heat management than compact fluorescent lamp sources of
comparable output.
Light-emitting diodes are used in applications as diverse as aviation lighting,
automotive lighting, advertising, general lighting, and traffic signals. LEDs have
allowed new text, video displays, and sensors to be developed, while their high
switching rates are also useful in advanced communications technology. Infrared
LEDs are also used in the remote control units of many commercial products
including televisions, DVD players and other domestic appliances. LEDs are also
used in seven-segment display
For Details Contact: A.VINAY-9030333433, 0877-2261612
BLOCK DIAGRAM
POWER
SUPPLY
IR PAIR
LED
For Details Contact: A.VINAY-9030333433, 0877-2261612
Advantages:
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Highly sensitive
Low cost and reliable circuit
Directional counting
Can count up to 99 digits
Error free counting with Monostable triggering
Applications:
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Battle filling industries
Museums
Visitors counting
Cinema theaters
Shopping malls
For Details Contact: A.VINAY-9030333433, 0877-2261612