Internet of Things project to preserve and protect the night time environment and our heritage of dark skies through environmentally responsible smart outdoor lighting. Companion android application was built using MIT App Inventor.

1. DARK SKY FRIENDLY
OUTDOOR LIGHTING SYSTEM
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2. CONTENTS
• AIM
• LITERATURE SURVEY
• INTRODUCTION
• BLOCK DIAGRAM
• CONTROL LOGIC
• COMPONENTS REQUIRED
• PERFORMANCE EVALUATION
• RESULT AND DISCUSSION
• CONCLUSION
• FUTURE SCOPE
• REFERENCE
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3. AIM
• To preserve and protect the night time environment and our heritage of dark skies
through environmentally responsible outdoor lighting
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4. LITERATURE SURVEY
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[1] The project was conducted by 1st year 2018 ECE students of VIT, Tamil Nadu
[2] Aim – reduce energy consumption – controlling brightness
[3] Manual controlling - difficult
[4] Not able to reduce light pollution

5. INTRODUCTION
• Light pollution - alternation of light levels in the outdoor environment - man-made
sources of light.
• Light pollution is any adverse effect of artificial light including
Sky glow
Glare
Light trespass
Light clutter
Decreased visibility at night
Energy waste
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6. SATELLITE IMAGE OF LIGHT POLLUTION
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7. WITH & WITHOUT LIGHT POLLUTION
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8. WITH & WITHOUT LIGHT POLLUTION
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9. BLOCK DIAGRAM
AC INPUT
BRIDGE
RECTIFIER
ZVC
ARDUINO
UNO
GATE
SIGNAL
TRIAC
STREET
LIGHT
LDR
BLUETOOTH
MODULE
ANDROID
APP
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10. 20-11-2019 10
CONTROL LOGIC
START
INPUT DATA FROM
MOBILE
IF
DATA
INPUT DATA FROM
LDR
SET α
DELAY FOR α µs
SEND TRIAC GATE
SIGNAL FOR 50µs
SET α
manual
auto

11. CONTROL LOGIC
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12. COMPONENTS REQUIRED
• Arduino UNO R3
• Bluetooth Module (HC-05)
• Full bridge rectifier(D3SB 60)
• TRIAC (BT136)
• Optocoupler (MOC3020)
• Optocoupler (MCT2e IC)
• Heat sink for BTA16
• LDR
• Resistor 330E x2
• Resistor 47kOhm x2
• Resistor 10kOhm x2
• Resistor 1k x2
• 2pin terminal connector x3
• Jumper wire
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13. CIRCUIT DIAGRAM FOR DIMMING
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14. CIRCUIT FOR BLUETOOTH MODULE
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15. CIRCUIT FOR LDR
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16. MIT APP INVENTOR APPLICATION BLOCKS
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17. APPLICATION MODES
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Arduino not connected MANUAL mode
AUTO mode

18. PERFORMANCE EVALUATION
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• Successfully completed the project
• Desired output was obtained
• Able to contol brightness manually and automatically
• Light pollution and power consumption can be reduced

19. RESULT & DISCUSSION
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• Manual control – without android app
• Reduced power consumption
• Not able to reduce light pollution
efficiently
MAIN PROJECT
• Manual control – using android app
• Reduced power consumption
• Able to reduce light pollution
REFERENCE PROJECT

20. CONCLUSION
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• Minimize light trespass
• Effective way to save power
• Preservation of night sky heritage
• Safe passage for migrating birds
• Usage of warm lights minimize the effects of blue light

21. FUTURE SCOPE
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• Use of dimmable LED streetlights
• Automation and central control of all streetlights
• Shielded Luminaries
• Motion sensor lighting in a parking lot

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VIDEO

23. REFERENCE
[1] Giancarlo Rinaldi , “A decade of UK’s first Dark Sky Park in Galloway,” BBC
Scotland news website, Nov. 16,2019.
[2] Techiesems, Simplest AC Dimmer explained , JUN 1,2019.Accessed
on:Oct.09,2019.[Video file]. Available: https://youtu.be/lQOzLP1lMJU
[3] Electronoobs, Bluetooth TRIAC AC power control, APR 1,2018. Accessed
on:Oct.14,2019.[Video file]. Available: https://youtu.be/QYUcXIhxL1I
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24. THANK YOU
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