Hi: My first post.

I have acquired a solar panel that produces 160mA at 10.5v in full sunlight and I want to build it into a circuit that charges a battery to power a light that comes on after dark. Outdoor security light concpet.

I need the light to shut off automatically after the battery gets below the required voltage after the light has burned for 2-4 hours. I know I will need a photo-detector, relay and maybe some kind of comparator for shut off.

(schematic copied from post by "Audioguru" from another thread)

How do I modify the above schematic to make the light to something more powerful (more LEDs?) and rig the circuit so it will switch off automatically if the batts. voltage drops to low during the night - don't want continuous batt drain if it gets too weak to power the light. Also, given the specs of my panel, what battery and how many should I choose to charge?


Greatfully yours,

Solar1

 

I modified and added a schematic to my post to be more specific.

Hope that helps!

 

Any suggestions would be greatly appreciated.

Thanks,

Solar1

 

Because there is commonality in the topic, would this be better served in the existing thread? At least all information regarding this topic would be grouped together.

Dave

 

Hello,

There is an almost the same topic by solar1 in this thread.
http://forum.allaboutcircuits.com/showthread.php?t=17952

Greetings,
Bertus

 

Hello,

There is an almost the same topic by solar1 in this thread.
http://forum.allaboutcircuits.com/showthread.php?t=17952

Greetings,
Bertus

Yes, that is the one I am referring to bertus. The questions appear to be targetted at slightly different elements of the same project. If there is commonality in the topic, then it is best kept in one place.

Dave

 

OOOps! Sorry for the redundant thread here guys.

If a Moderator would delete this thread, I would greatly appreciate it.

I posted this in the "General Electronics Chat" forum.

 

As the OP you can delete this thread yourself. One of the things I like about this site is they trust and give the users a bit more power than usual. So far people don't seem to abuse it. Off the top of my head I think you need to use the "Go Advanced" options.