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International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1971
TOUCH DIMMER SWITCH CIRCUIT
B. Vijay Kumar1, G. Maneswara Rao2, J. Yaswanth Kumar3, S. Hari Krishna4
1,2,3,4Student, Pragati Engineering College, Surampalem, Andhra Pradesh, INDIA
---------------------------------------------------------------------***----------------------------------------------------------------------
Abstract - The past decade has seen significant advancement
in the field of consumer electronics. A Touch Dimmer Switch
Circuit is a simple project, where the dimmer action is
achieved with the help of a Touch Sensor. While a regular
switch is used to simply turn ON or OFF a light, a Dimmer (or
Dimmer Switch) will allow us to control the brightness of the
light. Without a Dimmer Switch, the lightbulbstendtoglowat
full brightness consuming maximumpower. Iffull brightnessis
not required, then Dimmer Switches can be used and save
some energy. With the help of a Dimmer Switch, we can vary
the brightness from fully off to fully on.
Key Words: Micro controller Touch sensor, LED light,
Transistor, Printed Circuit Board.
1. INTRODUCTION
Early dimmers were directly controlled through the manual
manipulation of large dimmer panels. This required all
power to come through the lighting control location, which
could be inconvenient, inefficient and potentially dangerous
for large or high-powered systems, such as those used
for stage lightining.
1.1 Modern Light Dimmers:
Solid-state light dimmers work by varying the "duty cycle"
(on/off time) of the full AC voltage that is applied to the
lights being controlled. For example, if the voltage is applied
for only half of each AC cycle, the light bulb will appear to be
much less bright than when it get thefull ACvoltage,because
it get's less power to heat the filament. Solid-state dimmers
use the brightness knob setting todetermineatwhatpointin
each voltage cycle to switch the light on and off. Typical light
dimmers are built using thyristors and the exact time when
the thyristor is triggered relative to the zero crossings of the
AC power is used to determine the power level. When the
thyristor is triggered it keeps conducting until the current
passing though it goes to zero (exactly at the next zero
crossing if the load is purely resistive, like light bulb). By
changing the phase at which you trigger the triac youchange
the duty cycle and therefore the brightness of the light.
Fig -1: Waveform of dimmer
1.2 Touch Sensor
Different light bulbs need different dimmer switches and
there are different types of Dimmer Switchesavailablein the
market. Some of the commonly found Dimmer Switches are
Slider type and rotary type. In this project, wehavedesigned
a Touch Dimmer Switch using Arduino. The Touch Dimmer
Switch Circuit is implemented using a Touch Sensor. This
sensors are activated with the touch of human skin or a
stylus holding an electrical charge.
Fig -2: Touch Sensor
1.3 Aurdino
In default the Arduino is not equipped with a display to
visualize measuring-data, for example from your
temperature or your pressure Sensor. If you want to get the
data shown you need a PC, printing the data totheconsole or
mounting a display directly to the Arduino. So there is no
simple way to WIRELESSLY visualizemeasuring-data.Inthis
intractableFig.2will showhowto transfer measuredSensor-
data in real-time from your Arduino-Microcontroller to
your Android-Smartphone via Bluetooth.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1972
Fig -3: Bluetooth HC-05 and Arduino
2. PROBLEM FORMULATION
Over illumination is the presence of lightingintensity higher
than that which is appropriate for a specific activity. Over
illumination was commonly ignored between 1950 and
1995, especiallyinofficeand retail environments. Sincethen,
however, the interior design community has begun to
reconsider this practice. Overillumination encompassestwo
separate concerns. Unnecessaryelectric lightingisexpensive
and energy-intensive. Lighting accounts for approximately
9% of residential electricity use as of 200 and about 40% of
commercial electricity use.
2.1 Existing Technology
In electrical engineering, a switch is an electrical
component that can "make" or "break" an electrical circuit,
interrupting the current or diverting it from one conductor
to another. The mechanism of a switch removes or restores
the conducting path in a circuit when itisoperated. Itmaybe
operated manually, for example, a light switchora keyboard
button, may be operated by a moving object such as a door,
or may be operated by some sensing element for pressure,
temperature or flow. A switch will have one or more sets of
contacts, which may operate simultaneously,sequentially,or
alternately. Switches in high-powered circuits must operate
rapidly to prevent destructive arcing, and may include
special features to assist in rapidly interrupting a heavy
current. Multiple forms of actuators are used for operation
by hand or to sense position, level, temperature or flow.
Special types are used, for example,forcontrol ofmachinery,
to reverse electric motors, or to sense liquid level.
Fig -4: Traditional Switch
2.2 Proposed Technology
A Touch Dimmer Switch Circuit is a simple project,
where the dimmer action is achieved with the help of a
Touch Sensor. While a regular switch is used to simply turn
ON or OFF a light, a Dimmer (or Dimmer Switch) will allow
us to control the brightness of the light. Without a Dimmer
Switch, the light bulbs tend to glow at full brightness
consuming maximum power. If full brightness is not
required, then Dimmer Switches can be used and save some
energy. With the help of a Dimmer Switch, we can vary the
brightness from fully off to fully on. Intelligentlightingforms
part of home automation where the circuit levels are pre-
programmed according to use and accordingtootherfactors
such as time of day. Light fittings can be controlled
individually or grouped together in circuits. Each circuit or
fitting can be set to be at a different level of brightness.
These levels are then stored as a "scene" which can be best
of as being a complete look of a room. Some systems have10
or more programmable scenes. Once set up scenes can be
easily recalled manually from touch screen, switch panels,
infra-red or wireless remote controls. They can be recalled
automatically by time clock, or accordingtooccupancy.Once
a new scene is selected the lighting will fadetothe newsetof
levels.
3. Hardware Implementation
The design of the Touch Dimmer Switch Circuit is very
simple and is explained here. The touch sensor is given the
power supply by connecting 5V to VCC and ground to GND
pins. The SIG pin of the touch sensor is connected to any of
the digital input / output pin of the Arduino UNO board.
Here, it is connected to digital I/O pin 8.
Fig -5: Block diagram
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1973
4.1 Working
We will connect a small incandescent bulb that glows on DC.
The bulb is interface with the Arduino UNO board with the
help of a transistor. So, first connect the base of a transistor
like 2N2222 to any digital I/O pin of Arduino UNO with the
help of a current limiting resistor. Thenconnectthecollector
terminal of the transistor to the 5V power supply. And
finally, connect a bulb between the emitter and ground
terminals. This completes the design of the circuit. As
mentioned earlier, there are many typesofdimmerswitches
for different types of bulbs. In this project, a simple touch
dimmer switch circuit is designed. The working of the
project is explained here.
When the sensor is not touched, the SIG pin of the sensor
remains LOW. Whenever we touch the sensitive part of the
touch sensor, the SIG pin of the sensor goes HIGH. Since it is
connected to Arduino UNO, we will detect this change in
state i.e. LOW to HIGH.
So, when the finger is placed on the touch sensor, Arduino
UNO detects the change in the logic state of the sensor’s
output and drive the bulb using Pulse Width Modulation
(PWM). Hence, the bulb is connected to a PWM pin of the
Arduino UNO.
Fig -6: Output
4.2 Results
This is evident is that many of the products on the market
today have benefited from the development of touch screen
technology and particularly the use of microcontrollers to
process the signals from the sensing elements. This has
resulted in solutions that are far more capable and reliable
than older, discreet touch sensing circuits, while still
providing the basic functionalityofon/offswitchesorsimple
sliders or wheels for dimming.
5. CONCLUSION
Mention 'touch sensors' or 'touch control' today and most
people will tend to think of touchscreen displays, whether
these are the cash machines (ATMs) used by banks, the self-
scanning checkout terminals in grocery stores, or
increasingly our smartphones, tablet computers and e-
reader devices. Theseusescertainlyreflecttheadvancesthat
this technology has brought to our modernlife, butnotevery
application requires this level of sophistication and more
basic touch sensors still have a role to play in providing
convenient, easy-to-use controls. Lighting, for the home,
office or factory, is a prime example where often all that is
required is the ability to turn lights on and off or apply a
simple dimming function. While touch control of lighting is
not new, the broader developments in touch sensing have
seen a proliferation in dedicated ICs that make it even easier
and more cost-effective to design touch controls forlighting.
6. FUTURE SCOPE
These are the cash machines (ATMs) used by banks,theself-
scanning checkout terminals in grocery stores, or
increasingly our smart phones, tablet computers and e-
reader devices. Theseusescertainlyreflecttheadvancesthat
this technology has brought to our modernlife, butnotevery
application requires this level of sophistication and more
basic touch sensors still have a role to play in providing
convenient, easy-to-use controls. Lighting, for the home,
office or factory, is a prime example where often all that is
required is the ability to turn lights on and off or apply a
simple dimming function. While touch control of lighting is
not new, the broader developments in touch sensing have
seen a proliferation in dedicated ICs that make it even easier
and more cost-effective to design touch controls forlighting.
REFERENCES
1) Hernando Barragán (2016-01-01). "The UntoldHistoryof
Arduino"
2) “Programming Arduino”, book by “Simon Monk”
3) https://www.electroschematics.com/2353/touch-
dimmer-switch-circuit/
4) https://en.wikipedia.org/wiki/Touch_switch
5) Beginner's Guide to Reading Schematics, Fourth Edition
by “Stan Gibilisco”.

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IRJET- Touch Dimmer Switch Circuit

  • 1. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1971 TOUCH DIMMER SWITCH CIRCUIT B. Vijay Kumar1, G. Maneswara Rao2, J. Yaswanth Kumar3, S. Hari Krishna4 1,2,3,4Student, Pragati Engineering College, Surampalem, Andhra Pradesh, INDIA ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - The past decade has seen significant advancement in the field of consumer electronics. A Touch Dimmer Switch Circuit is a simple project, where the dimmer action is achieved with the help of a Touch Sensor. While a regular switch is used to simply turn ON or OFF a light, a Dimmer (or Dimmer Switch) will allow us to control the brightness of the light. Without a Dimmer Switch, the lightbulbstendtoglowat full brightness consuming maximumpower. Iffull brightnessis not required, then Dimmer Switches can be used and save some energy. With the help of a Dimmer Switch, we can vary the brightness from fully off to fully on. Key Words: Micro controller Touch sensor, LED light, Transistor, Printed Circuit Board. 1. INTRODUCTION Early dimmers were directly controlled through the manual manipulation of large dimmer panels. This required all power to come through the lighting control location, which could be inconvenient, inefficient and potentially dangerous for large or high-powered systems, such as those used for stage lightining. 1.1 Modern Light Dimmers: Solid-state light dimmers work by varying the "duty cycle" (on/off time) of the full AC voltage that is applied to the lights being controlled. For example, if the voltage is applied for only half of each AC cycle, the light bulb will appear to be much less bright than when it get thefull ACvoltage,because it get's less power to heat the filament. Solid-state dimmers use the brightness knob setting todetermineatwhatpointin each voltage cycle to switch the light on and off. Typical light dimmers are built using thyristors and the exact time when the thyristor is triggered relative to the zero crossings of the AC power is used to determine the power level. When the thyristor is triggered it keeps conducting until the current passing though it goes to zero (exactly at the next zero crossing if the load is purely resistive, like light bulb). By changing the phase at which you trigger the triac youchange the duty cycle and therefore the brightness of the light. Fig -1: Waveform of dimmer 1.2 Touch Sensor Different light bulbs need different dimmer switches and there are different types of Dimmer Switchesavailablein the market. Some of the commonly found Dimmer Switches are Slider type and rotary type. In this project, wehavedesigned a Touch Dimmer Switch using Arduino. The Touch Dimmer Switch Circuit is implemented using a Touch Sensor. This sensors are activated with the touch of human skin or a stylus holding an electrical charge. Fig -2: Touch Sensor 1.3 Aurdino In default the Arduino is not equipped with a display to visualize measuring-data, for example from your temperature or your pressure Sensor. If you want to get the data shown you need a PC, printing the data totheconsole or mounting a display directly to the Arduino. So there is no simple way to WIRELESSLY visualizemeasuring-data.Inthis intractableFig.2will showhowto transfer measuredSensor- data in real-time from your Arduino-Microcontroller to your Android-Smartphone via Bluetooth.
  • 2. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1972 Fig -3: Bluetooth HC-05 and Arduino 2. PROBLEM FORMULATION Over illumination is the presence of lightingintensity higher than that which is appropriate for a specific activity. Over illumination was commonly ignored between 1950 and 1995, especiallyinofficeand retail environments. Sincethen, however, the interior design community has begun to reconsider this practice. Overillumination encompassestwo separate concerns. Unnecessaryelectric lightingisexpensive and energy-intensive. Lighting accounts for approximately 9% of residential electricity use as of 200 and about 40% of commercial electricity use. 2.1 Existing Technology In electrical engineering, a switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another. The mechanism of a switch removes or restores the conducting path in a circuit when itisoperated. Itmaybe operated manually, for example, a light switchora keyboard button, may be operated by a moving object such as a door, or may be operated by some sensing element for pressure, temperature or flow. A switch will have one or more sets of contacts, which may operate simultaneously,sequentially,or alternately. Switches in high-powered circuits must operate rapidly to prevent destructive arcing, and may include special features to assist in rapidly interrupting a heavy current. Multiple forms of actuators are used for operation by hand or to sense position, level, temperature or flow. Special types are used, for example,forcontrol ofmachinery, to reverse electric motors, or to sense liquid level. Fig -4: Traditional Switch 2.2 Proposed Technology A Touch Dimmer Switch Circuit is a simple project, where the dimmer action is achieved with the help of a Touch Sensor. While a regular switch is used to simply turn ON or OFF a light, a Dimmer (or Dimmer Switch) will allow us to control the brightness of the light. Without a Dimmer Switch, the light bulbs tend to glow at full brightness consuming maximum power. If full brightness is not required, then Dimmer Switches can be used and save some energy. With the help of a Dimmer Switch, we can vary the brightness from fully off to fully on. Intelligentlightingforms part of home automation where the circuit levels are pre- programmed according to use and accordingtootherfactors such as time of day. Light fittings can be controlled individually or grouped together in circuits. Each circuit or fitting can be set to be at a different level of brightness. These levels are then stored as a "scene" which can be best of as being a complete look of a room. Some systems have10 or more programmable scenes. Once set up scenes can be easily recalled manually from touch screen, switch panels, infra-red or wireless remote controls. They can be recalled automatically by time clock, or accordingtooccupancy.Once a new scene is selected the lighting will fadetothe newsetof levels. 3. Hardware Implementation The design of the Touch Dimmer Switch Circuit is very simple and is explained here. The touch sensor is given the power supply by connecting 5V to VCC and ground to GND pins. The SIG pin of the touch sensor is connected to any of the digital input / output pin of the Arduino UNO board. Here, it is connected to digital I/O pin 8. Fig -5: Block diagram
  • 3. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1973 4.1 Working We will connect a small incandescent bulb that glows on DC. The bulb is interface with the Arduino UNO board with the help of a transistor. So, first connect the base of a transistor like 2N2222 to any digital I/O pin of Arduino UNO with the help of a current limiting resistor. Thenconnectthecollector terminal of the transistor to the 5V power supply. And finally, connect a bulb between the emitter and ground terminals. This completes the design of the circuit. As mentioned earlier, there are many typesofdimmerswitches for different types of bulbs. In this project, a simple touch dimmer switch circuit is designed. The working of the project is explained here. When the sensor is not touched, the SIG pin of the sensor remains LOW. Whenever we touch the sensitive part of the touch sensor, the SIG pin of the sensor goes HIGH. Since it is connected to Arduino UNO, we will detect this change in state i.e. LOW to HIGH. So, when the finger is placed on the touch sensor, Arduino UNO detects the change in the logic state of the sensor’s output and drive the bulb using Pulse Width Modulation (PWM). Hence, the bulb is connected to a PWM pin of the Arduino UNO. Fig -6: Output 4.2 Results This is evident is that many of the products on the market today have benefited from the development of touch screen technology and particularly the use of microcontrollers to process the signals from the sensing elements. This has resulted in solutions that are far more capable and reliable than older, discreet touch sensing circuits, while still providing the basic functionalityofon/offswitchesorsimple sliders or wheels for dimming. 5. CONCLUSION Mention 'touch sensors' or 'touch control' today and most people will tend to think of touchscreen displays, whether these are the cash machines (ATMs) used by banks, the self- scanning checkout terminals in grocery stores, or increasingly our smartphones, tablet computers and e- reader devices. Theseusescertainlyreflecttheadvancesthat this technology has brought to our modernlife, butnotevery application requires this level of sophistication and more basic touch sensors still have a role to play in providing convenient, easy-to-use controls. Lighting, for the home, office or factory, is a prime example where often all that is required is the ability to turn lights on and off or apply a simple dimming function. While touch control of lighting is not new, the broader developments in touch sensing have seen a proliferation in dedicated ICs that make it even easier and more cost-effective to design touch controls forlighting. 6. FUTURE SCOPE These are the cash machines (ATMs) used by banks,theself- scanning checkout terminals in grocery stores, or increasingly our smart phones, tablet computers and e- reader devices. Theseusescertainlyreflecttheadvancesthat this technology has brought to our modernlife, butnotevery application requires this level of sophistication and more basic touch sensors still have a role to play in providing convenient, easy-to-use controls. Lighting, for the home, office or factory, is a prime example where often all that is required is the ability to turn lights on and off or apply a simple dimming function. While touch control of lighting is not new, the broader developments in touch sensing have seen a proliferation in dedicated ICs that make it even easier and more cost-effective to design touch controls forlighting. REFERENCES 1) Hernando Barragán (2016-01-01). "The UntoldHistoryof Arduino" 2) “Programming Arduino”, book by “Simon Monk” 3) https://www.electroschematics.com/2353/touch- dimmer-switch-circuit/ 4) https://en.wikipedia.org/wiki/Touch_switch 5) Beginner's Guide to Reading Schematics, Fourth Edition by “Stan Gibilisco”.