Automatic Street Light

E

ertiexd125

New Member

• Feb 8, 2011

• #1

Attach is a simple circuit for an automatic street light using LDR as sensor.
Can you suggest anything that could be an innovation to this circuit or anything you may think of that could be added to make it really innovative but the application will remain to be there which is lighting up the streets.
Help me please, ill be waiting for your replies.

 

Attachments

• Automatic Street Light.png

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audioguru

Well-Known Member

Most Helpful Member

• Feb 8, 2011

• #2

The circuit has a 6V relay coil that will smoke and burn when the transistor applies 11.8V to it.

Why is there a transistor? The 555 has plenty of output current to drive the relay without the transistor. The logic will be reversed without the transistor so connect the relay coil to ground instead of the the positive supply and reverse the diode. Use a 9V or 12V relay coil.

 

H

HarveyH42

Banned

• Feb 8, 2011

• #3

You could add some sort of bird crap detector, so it doesn't stay on during the day, after birds cover the sensor with their filth...

 

E

ertiexd125

New Member

• Feb 9, 2011

• #4

nc idea but how am i suppose to do that?

 

audioguru

Well-Known Member

Most Helpful Member

• Feb 9, 2011

• #5

ertiexd125 said:

nc idea but how am i suppose to do that?

Click to expand...

Hire somebody to scare away the birds.

 

B

BrownOut

Banned

• Feb 9, 2011

• #6

Put the sensor on the bottom. I never saw a bird crap up.

 

audioguru

Well-Known Member

Most Helpful Member

• Feb 9, 2011

• #7

BrownOut said:

Put the sensor on the bottom. I never saw a bird crap up.

Click to expand...

Dog pee will destroy a low mounted sensor.

 

B

BrownOut

Banned

• Feb 10, 2011

• #8

No, not low mounted. Mounted on the bottom of the light fixture, just like my motion operated flood light at home. The light sensor is mounted at the bottom of the fixture, which is itself mounted on the soffit of my house, about 9 feet off the ground.

 

transistor495

Member

Forum Supporter

• Feb 10, 2011

• #9

I've made this drawing couple of years ago:

 

audioguru

Well-Known Member

Most Helpful Member

• Feb 10, 2011

• #10

My city uses electrical power for street lights. The underground wires and electricity are cheap.
Very expensive solar panels and batteries are used for low power school crossing signs and parking meter pay machines so they do not need to dig up the street to install wires.

 

M

MEJY1988

New Member

• Feb 10, 2011

• #11

Ever thought of putting in an "Override" switch. That way the Technician can determine if it is the Sensor, Ballast, lamp, or lack of power.

 

E

ertiexd125

New Member

• Feb 11, 2011

• #12

thanks sir meji for the reply but i already added that to my circuit. thanks anyway!