1. IR REMOTE CONTROLLED
DIMMER
UNDER GUIDANCE OF-
Er. SUDHIR KUMAR
ASST. PROFESSOR
DEPT. OF ELRCTRONICS ENGINEERING
SUBMITTED BY-
AKSHAYA RANJAN MISHRA (210113)
RAJU SHARMA (210118)
MANOJ PRABHAKAR CHAURASIA(210139)

2.  IR remote control dimmer is a device which is
used to dime the light as per requirement.
 It is microcontroller based device.
 It is controlled by IR remote.
 Today we are using many devices in our home
to improve our life and this is another example
on how you can enhance a simple procedure
like switching the lights on /off.
INTRODUCTION

3. BLOCK DAGRAM OF IR CONTROLLED
DIMMER

4. DIMMER
 Dimmers are devices used to vary the brightness of a
light.
 It is decreasing or increasing the RMS voltage
and, hence, the mean power to the lamp.
 It is possible to vary the intensity of the light output.

5. TYPE OF DIMMER
 Rheostat dimmer
 Saltwater dimmer
 Coil-rotation transformer
 Autotransformer dimmer

6. INFRARED
 Infrared (IR) light is electromagnetic radiation with
longer wavelengths than those of visible light.
 Its wavelength ranges from 700nm-1mm.
 Infrared radiation is used for short and medium range
communications and control.
 Some systems operate in diffuse mode also called
scatter mode. This type of system can function when
the source and destination are not directly visible to
each other.

7. BLOCK DIAGRAM OF IR TRANSMITTER

8. PIC 16F628 microcontroller is used.
PIC16F628 is 8 bit microcontroller.
It has program memory of 256.
Data memory is 16(bytes).
It has 4 i/o ports.
USED MICROCONTROLLER

9. CIRCUIT DIAGRAM OF IR CONTROLLED
DIMMER

10. Infra-Red light: cheapest way to remotely control a
device within a visible range .
Almost all audio and video equipment are now
controlled by IR.
IR CONTROL

11. IR MODULATION
 Modulation: To make our signal stand out above the
noise.
 With modulation we make the IR light source blink in a
particular frequency. (30– 60 KHz)
 The IR receiver will be tuned to that frequency, so it can
ignore everything else.

12.  Detection Diode: IR signal is picked up.
 Amplifier & Limiter: Signal is amplified and limited by
the first 2 stages. The limiter acts as an AGC circuit to get
a constant pulse level.
 Band Pass Filter: Tuned to the modulation frequency of
the handset unit.
 Detector, Integrator and Comparator: To detect the
presence of the modulation frequency. If this modulation
frequency is present the output of the comparator will be
low.
IR RECEIVER

13. USED IN-
 HOME
 OFFICE
 HOTELS
 AIRPORTS & AIRPLANCES
 METROS TRAINS
 BUSSES
APPLICATION

14. IR remote control signal is implemented using
microcontroller and its application is successfully
demonstrated for home applications.
 The system is quite cheap, reliable and easy to
operate.
 Due to use of MCU the work presented in this
article can further be extended for web.
CONCLUSION