Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Street Lighting Controller based on Longitude and Latitude ?

Status
Not open for further replies.

latecomer

Member level 4
Joined
Jun 6, 2001
Messages
77
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,288
Location
USA
Activity points
642
schmitt trigger street light controller

Hello all,
I'm looking for a solution for making a street lighting controller using microcontroller. The street lighting controller should have option to programme the longitude and latitude so that the sunrise and sunset timing can be internally set for switching ON and OFF the street light. Has anyone worked on similar application before ? Anyone can help me in locating the formula used for calculating the sunrise and sunset time based on longitude,latitude and month?
Thanks in advance.
 

silvio

Advanced Member level 3
Joined
Dec 31, 2001
Messages
716
Helped
105
Reputation
210
Reaction score
16
Trophy points
1,298
Location
Romania
Activity points
11,497
street light control using ldr

Hi Latecomer,

Don't make your life much more complicated than it is. You don't need any formula to calculate the sunrise and sunset time based, simply because your application don't need it.
Try to imagine a small storm in the middle of day, when natural lights go down (obvious if your lighting company could afford and handle that).
Thus, to switch ON / OFF the street light you need a good light transducer (read photocell), a micro + software (though an ordinary and cheep 555 timer could be suitable as well).
Set two adjusting sensitive threshold level for proper dark and light, when you need to switch ON / OFF the street light, apply a small hysteresys in order to avoid false thriggering and that's all.
This way you'll succeed to solve the problem, even when huge and black clouds covers the sky.

Regards,
Silvio
 

Analyzer

Full Member level 6
Joined
Nov 18, 2001
Messages
374
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,298
Activity points
3,518
street light control+microcontroller+ldr

Hi,

I worked on a similar project that has no mcu in it.I used a small ldr, 2 transistors, 4 resistors and relay.Just all.The ldr controls bias current of transistors.That's it.If you need a schematic just ring me.

Analyzer.
 

Analyzer

Full Member level 6
Joined
Nov 18, 2001
Messages
374
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,298
Activity points
3,518
Yep,

If you want to control with an ic just use built-in schmitt trigger ttl ic's That is much practical :)

Analyzer
 

sahu

Advanced Member level 2
Joined
Oct 9, 2009
Messages
516
Helped
67
Reputation
128
Reaction score
61
Trophy points
1,308
Location
Uttar pradesh (INDIA)
Activity points
3,885
Re: schmitt trigger street light controller

latecomer said:
Hello all,
I'm looking for a solution for making a street lighting controller using microcontroller. The street lighting controller should have option to programme the longitude and latitude so that the sunrise and sunset timing can be internally set for switching ON and OFF the street light. Has anyone worked on similar application before ? Anyone can help me in locating the formula used for calculating the sunrise and sunset time based on longitude,latitude and month?
Thanks in advance.
i am working just like same project .
i hope some idea ,u can find hear
https://www.edaboard.com/viewtopic.php?p=1198708#1198708
 

kender

Advanced Member level 4
Joined
Jun 19, 2005
Messages
1,422
Helped
138
Reputation
276
Reaction score
38
Trophy points
1,328
Location
Stanford, SF Bay Peninsula, California, Earth, Sol
Activity points
9,966
Re: schmitt trigger street light controller

latecomer said:
Anyone can help me in locating the formula used for calculating the sunrise and sunset time based on longitude,latitude and month?
I did a quick googling and found this: http://en.wikipedia.org/wiki/Sunrise_equation.
Probably, your circuit will need to be aware of real time too.
 

flatulent

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
Re: Street Lighting Controller based on Longitude and Latitu

The simplest method is to have a solar light sensor at a central location that turns the power on and off for the whole lighting system. Knowing the location does not give you the added parameters of clouds attenuating the light.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top