Help me! battery to lamp

[Kira0172]

Hello,

 

First, i want to say that i don't know much about elektricity and batterys, but i really need some help, and i don't know where to put this so i put it here. I did learn about serie parallel and some other things but it was a long time ago.

 

The case is:
We have a garden, but there is no elektricity. It's not connected to our house, it's kind of like this small farm.
Sometimes we go there at night and it's pretty annoying to use flashlights so i wanted to have 3 light bulbs there. I think the best way to do this is with a battery. 

 

I need some help on:
What battery? How much amp, volt, rechargable or not etc..
Serie? Parallel?
what kind of light bulbs go well with the recommended battery?

 

More information:
I want switches on each bulb, so 3 switches.
I also want 1 bulb to be "weaker", im going to use that oneless than the others.

If rechargable battery: We are usually staying there max. 5 hours.
It's a small area, too much power isn't needed. 

Budget: I don't know how much batterys cost, but it's probably no problem.

I think i explained enough, if not, please tell me.
I hope there are some mechanicnerds here!

Thanks!
 

[T.Vengeance]

Putting batteries in series increases the voltage. Putting batteries in parallel either increases the current (Amps), or the battery life. You can't use conventional lightbuilbs since they run off 120V/240V. So I'd recommend finding a 12V lightbulb or even better, an LED lamp.

 

Two 6V batteries in series will create 12 Volts.

 

Alternatively, you can get those garden lamps that runs off solar cell. They'd charge in the day and release it in the night. Would that work?

http://www.canadiantire.ca/AST/browse/2/OutdoorLiving/GardenLighting/SolarGardenLights.jsp?locale=en&bmLocale=en&adlocation=CLP_Outdoor%3AGarden+Lighting_mmb1_Category_Product_SolarGardenLights13111_en

[João Severino]

I believe that for your need you should look into car batteries and lights

Cars usually have either a 12v or 6v battery (the most usual are the 12v one)

If you get one or two of the 12 volts car batteries and putt them in parallel, increasing the current you can attach a couple of 12v light bulbs and expect several hours of usage

[Hans Christian | Teri]

I believe that for your need you should look into car batteries and lights

Cars usually have either a 12v or 6v battery (the most usual are the 12v one)

If you get one or two of the 12 volts car batteries and putt them in parallel, increasing the current you can attach a couple of 12v light bulbs and expect several hours of usage

 

You should however remember that car batteries are fairly expensive and also fairly dangerous. They discharge lethal currents and contain dangerous chemicals. Before doing this you should definitely look into proper handling and use.

[João Severino]

You should however remember that car batteries are fairly expensive and also fairly dangerous. They discharge lethal currents and contain dangerous chemicals. Before doing this you should definitely look into proper handling and use.

 

I don't know if you can find them but here in Portugal I've seen ones that don't have any acid in them therefore a lot safer then the regular ones and are very cheap

 

Instead it can also be used motorcycle batteries or others

 

I just advised car batteries because I've used them in the past for similar applications and they provide a lot of working hours when you draw such little current

[whatthe_fuzz]

would this do? i dont know if this would fit your exact use

[Kira0172]

I'm a little confused.

 

so i'm gonna do parallel
I found this one:

http://www.avantius.nl/product/loodaccu-12-v-72-ah352063/?gclid=CMTIkL_s7rgCFfIPtAodfEwA0g

Is it OK? How long will it work?

And on the same site, they have LED's but it doesn't say how many volts, just watt..

[T.Vengeance]

I'm a little confused.

 

so i'm gonna do parallel

I found this one:

http://www.avantius.nl/product/loodaccu-12-v-72-ah352063/?gclid=CMTIkL_s7rgCFfIPtAodfEwA0g

Is it OK? How long will it work?

And on the same site, they have LED's but it doesn't say how many volts, just watt..

Power (W) = V*A

 

So if you have a lamp that uses 30W connected to a battery that has a capacity of 7.2Amp-hour: 30W/7.2 Amp-hour = 4.2 hours.  (embarrasing show of fail math and science...)

 

W = VA

 

Battery: 12V * 7.2Amp-hour = 86.4Watt-hour

 

If you connect that battery to a 30W lamp:   86.4Wh/30W = 2.88 hours

[Kira0172]

Ok so then 1 of: http://www.avantius.nl/product/loodaccu-12-v-72-ah352063/?gclid=CMTIkL_s7rgCFfIPtAodfEwA0g
And 3 of: http://www.avantius.nl/product/gu53-led-mr-16-3x-1-w/

So 1.5Wx3=4.5W
86.4Wh/4.5W= 19.2 hours?

 

So if i have them all on for 19.2 hours the battery will die.

And what is the difference between a 20W LED and 1.5W LED

 

BTW would you do the same. I mean 1 lamp is for a small 3m^2 kind of house, 1 for outside, and the other one outside hanging above a table.
Are there more efficient ways?

[T.Vengeance]

Ok so then 1 of: http://www.avantius.nl/product/loodaccu-12-v-72-ah352063/?gclid=CMTIkL_s7rgCFfIPtAodfEwA0g

And 3 of: http://www.avantius.nl/product/gu53-led-mr-16-3x-1-w/

So 1.5Wx3=4.5W

86.4Wh/4.5W= 19.2 hours?

 

So if i have them all on for 19.2 hours the battery will die.

And what is the difference between a 20W LED and 1.5W LED

 

BTW would you do the same. I mean 1 lamp is for a small 3m^2 kind of house, 1 for outside, and the other one outside hanging above a table.

Are there more efficient ways?

Generally, the higher the wattage, the brighter the light is. I'm not too experienced with lighting so I can't tell what sort of lighting setup to use. In my opinion, I think that setup should be fine, since a single common bright white LED runs at 3V @ 50 milliwatt. Nevertheless, I'd say the least troublesome way is to get a solar cell to charge the battery during the day.

[Kira0172]

Generally, the higher the wattage, the brighter the light is. I'm not too experienced with lighting so I can't tell what sort of lighting setup to use. In my opinion, I think that setup should be fine, since a single common bright white LED runs at 3V @ 5milliwatt. Nevertheless, I'd say the least troublesome way is to get a solar cell to charge the battery during the day.

The problem with that is that only 1 spot is outside the rest have a "roof", adn even that spot has not much sun. 

Thanks for the help by the way

However, i don't know how to connect wires n shit._.

I know how to do parallel but do i connect 3 wires to the battery(Wich i dont know how)? split into 3 wires and then back to 1? Or doesnt it matter

[T.Vengeance]

The problem with that is that only 1 spot is outside the rest have a "roof", adn even that spot has not much sun. 

Thanks for the help by the way

However, i don't know how to connect wires n shit._.

I know how to do parallel but do i connect 3 wires to the battery(Wich i dont know how)? split into 3 wires and then back to 1? Or doesnt it matter

No it should just be 2 wires (2 lanes rather) since this is DC current.

 

 

Connect + to + on the batteries, and - to - on the batteries. Hook one of the terminals (either plus or minus) to the LED. Make sure you connect the + side to the LED + side. The LED is polarity sensitive. Then hook the other to a switch, and on the opposite side of the switch, to the other LED terminal.

 

I guess all together, If you use wires, you'll end up using a total of 6 wires.

[Kira0172]

No it should just be 2 wires (2 lanes rather) since this is DC current.

 

Circuit.png

 

Connect + to + on the batteries, and - to - on the batteries. Then just hook those final terminals to the LED. Make sure you connect the + side to the LED + side. The LED is polarity sensitive.

 

I guess all together, If you use wires, you'll end up using a total of 4 wires.

But.. I am going to be having 3 lamps, and 1 battery. The circuit you made has 2 batterys right?

[T.Vengeance]

But.. I am going to be having 3 lamps, and 1 battery. The circuit you made has 2 batterys right?

Sorry I made a mistake there. I forgot you needed a switch. And i thought you were trying to put the batteries in parallel, not the lamps. Gimme a minute to edit it.

[Kira0172]

Sorry I made a mistake there. I forgot you needed a switch. And i thought you were trying to put the batteries in parallel, not the lamps. Gimme a minute to edit it.

Thanks, I need 3 switches tho

[T.Vengeance]

Thanks, I need 3 switches tho

K so this is what you're gonna do:

 

1. You connect the negative side (or positive, which ever you choose, but keep it the same for the rest) of each of the LED to a switch.

 

2. From there connect all the ends of the switch to each other. Connect the other remaining side of the LED to all the other remaining sides of the other 2 LEDs.

 

3. Finally connect the switch to the side of the battery with the same polarity as the LED that the switch is connected to.

 

4. Do the same for that remaining side of the LED. That should work.

 

[Kira0172]

K so this is what you're gonna do:

 

1. You connect the negative side (or positive, which ever you choose, but keep it the same for the rest) of each of the LED to a switch.

 

2. From there connect all the ends of the switch to each other. Connect the other remaining side of the LED to all the other remaining sides of the other 2 LEDs.

 

3. Finally connect the switch to the side of the battery with the same polarity as the LED that the switch is connected to.

 

4. Do the same for that remaining side of the LED. That should work.

 

Circuit.png

 

Circuit2.png

Great circuit pictures. Thanks

 

However i dont really know wich wires i have to use. It's not english but you can see the pictures. Can you tell me wich one on this site:

https://www.gamma.nl/assortiment/elektriciteit/installatiemateriaal/draad-kabel/c/P0293

 

And as dumb as it sounds, how do i connect lets say a wire to a switch. And will any switch work?

[T.Vengeance]

Great circuit pictures. Thanks

 

However i dont really know wich wires i have to use. It's not english but you can see the pictures. Can you tell me wich one on this site:

https://www.gamma.nl/assortiment/elektriciteit/installatiemateriaal/draad-kabel/c/P0293

 

And as dumb as it sounds, how do i connect lets say a wire to a switch. And will any switch work?

Yeah I assume that the switch has some sort of screw that you can tighten around the wire. I'm no electrician...so take what I say with a grain of salt. Either way, the wire that you use shouldn't matter, though I'd get the single wire (https://www.gamma.nl/assortiment/gamma-hittebestendig-snoer-1-5-mm-grijs-5-m/p/B456967?q=fh_location%3d%2f%2fcatalog01%2fnl_NL%2fcategories%3C%7bcatalog01_catgnc09%7d%2fcategories%3C%7bcatalog01_catgnc09_catgnc09s003%7d%2fcategories%3C%7bcatalog01_catgnc09_catgnc09s003_catp0340293%7d%2ffh_item_type%3d%7bproduct%7d%26fh_start_index%3d20%26fh_view_size%3d20%26fh_eds%3d%25C3%259F%26fh_refview%3dlister%26fh_lister_pos%3d26%26fh_secondid%3db_product_b021456967) since you need one wire per connection. Just make sure that it's not so thin. I can't tell the wire gauge from the link, but a wire with the thickness of perhaps 1.5-2mm should be fine. If you pick out the 3 wire in one cable (like this https://www.gamma.nl/assortiment/gamma-neopreensnoer-3x1-5-mm-zwart-10-m/p/B457217?q=fh), just use 2 of the 3 wires and keep track of the colours.

[Kira0172]

Yeah I assume that the switch has some sort of screw that you can tighten around the wire. I'm no electrician...so take what I say with a grain of salt. Either way, the wire that you use shouldn't matter. Just make sure that it's not so thin. I can't tell the wire gauge from the link, but a wire with the thickness of perhaps 1.5-2mm should be fine. If you pick out the 3 wire in one cable (like this https://www.gamma.nl/assortiment/gamma-neopreensnoer-3x1-5-mm-zwart-10-m/p/B457217?q=fh), just use 2 of the 3 wires and keep track of the colours.

Sooo.. wich one do i not use xD

 

[T.Vengeance]

Sooo.. wich one do i not use xD

 

https://www.gamma.nl/assortiment/gamma-hittebestendig-snoer-1-5-mm-grijs-5-m/p/B456967?q=fh_location%3D%2F%2Fcatalog01%2Fnl_NL%2Fcategories%3C%7Bcatalog01_catgnc09%7D%2Fcategories%3C%7Bcatalog01_catgnc09_catgnc09s003%7D%2Fcategories%3C%7Bcatalog01_catgnc09_catgnc09s003_catp0340293%7D%2Ffh_item_type%3D%7Bproduct%7D%26fh_start_index%3D20%26fh_view_size%3D20%26fh_eds%3D%25C3%259F%26fh_refview%3Dlister%26fh_lister_pos%3D26%26fh_secondid%3Db_product_b021456967

that should be fine

[Kira0172]

https://www.gamma.nl/assortiment/gamma-hittebestendig-snoer-1-5-mm-grijs-5-m/p/B456967?q=fh_location%3D%2F%2Fcatalog01%2Fnl_NL%2Fcategories%3C%7Bcatalog01_catgnc09%7D%2Fcategories%3C%7Bcatalog01_catgnc09_catgnc09s003%7D%2Fcategories%3C%7Bcatalog01_catgnc09_catgnc09s003_catp0340293%7D%2Ffh_item_type%3D%7Bproduct%7D%26fh_start_index%3D20%26fh_view_size%3D20%26fh_eds%3D%25C3%259F%26fh_refview%3Dlister%26fh_lister_pos%3D26%26fh_secondid%3Db_product_b021456967

that should be fine

Translated, that one says "heat resistant". Won't matter tho i think.

 

Anyway thank you a lot! You surely helped me^^