street light switch
TRANSCRIPT
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Mini project
On
A SIMPLE LIGHT ACTIVATED SWITCH
ByBatch No: B13-2
G.VIJAY 09881A04A9
R.RAJESH 09881A0489
Under the guidance of
Ms .DEEPA
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AGENDA Introduction
Components used
Pin diagram Circuit diagram
Working
Applications
Conclusion
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Introduction
What is Light Activated Switch? For What Purpose do we Require it.
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COMPONENTS USEDLight Dependent Resistors
o LDRs are very useful especially in light/dark sensor circuits.
o Resistance of LDRs are very high.
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RELAY DRIVERS A device that responds to a small current or voltage
change by activating switches or other devices in an
electric circuit
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Circuit diagram
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Working
The LED switch ON when there is Absense of theLight on the Light Depending Resistor.
. When night falls the resistance of LDR increases tomake the voltage across the R2 to decrease below0.6V. This makes transistor Q1 OFF which in turnmakes Q2 ON. The relay will be energized and the
bulb will glow.
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Components used: Transistors (bc 107,sl 100)
LDR
100kpreset Resistors (1k)
relay (9v)
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Applications
Automatic Street Light
Institutes
HomeAutomatic Parking Light
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CONCLUSIONWe have presented the basic security mechanisms of
the Simple Light Activated Switch, and we havedemonstrated that our design is sufficiently flexible toaccommodate a wide variety of security-relatedmechanisms.
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QUERIES
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