Solar panels? - Page 2

JC-S60 · 06-23-2008, 09:47 AM

Just connect a very strong lamp to the battery/solar panel and aim it at the solar panel. That way it will even work at night!

Chairboy · 06-23-2008, 09:52 AM

Quote: Originally Posted by Ausi319

but i need a 7.2 volt and a 1500mA solar panel that is only like 3' by 2" or something like that to power it then.

I forgot to mention the importance of using a diode to make sure that the electricity only flows one way, from the solar panel to the battery. If you don't have one, there's a chance that the battery might discharge into the panel, converting it back into pure sunlight. Since the surface of the sun is almost 11,000 degrees fahrenheit (about 6,000C) you can imagine the chaos this could cause*.

Maybe you should reconsider using solar in your project and stick to nice, safe batteries.

* A little known fact, the bomb dropped on Hiroshima was essentially a collection of a few hundred old fashioned solar panels hooked to a car battery. They've gotten much more efficient since, making them quite dangerous if used improperly.

FusionFanatic · 06-23-2008, 12:08 PM

...still LMFAO

Ausi319 · 06-23-2008, 12:22 PM

Quote: Originally Posted by Chairboy

I forgot to mention the importance of using a diode to make sure that the electricity only flows one way, from the solar panel to the battery. If you don't have one, there's a chance that the battery might discharge into the panel, converting it back into pure sunlight. Since the surface of the sun is almost 11,000 degrees fahrenheit (about 6,000C) you can imagine the chaos this could cause*.

Maybe you should reconsider using solar in your project and stick to nice, safe batteries.

* A little known fact, the bomb dropped on Hiroshima was essentially a collection of a few hundred old fashioned solar panels hooked to a car battery. They've gotten much more efficient since, making them quite dangerous if used improperly.

I'm going to take pics of my car and body to help me but i just need help. I really think its a good idea. And the batteries only run about 7 mins anyway so i want to keep them charged.

It is a 7.2 battery and is 1500 mA(i'll take a pic of that too.)
Just someone promise they will help me i'm getting sick of this car only running that long and want it to run longer

ok cant get pics on here too big of file
ok well the car is about at max a foot
by like 3"

Ausi319 · 06-23-2008, 02:01 PM

k i put a little pic of the car might not help much but its not that big its a 1:18 scale racing car.

i race it so i cant hurt it that bad. But i need solar power!

Rob Withey · 06-25-2008, 04:34 PM

Quote: Originally Posted by Ausi319

Just someone promise they will help me i'm getting sick of this car only running that long and want it to run longer

Ok, here's a complately crazy, out-there idea. Get another battery or two, and whilst you are discharging one you can be charging the others. Then when it gets flat just swap them over.

Solar aint never gonna work. Give up...! Or keep entertaining us, your choice.

Chairboy · 06-25-2008, 04:46 PM

You know, one problem with using solar that we haven't mentioned yet is the problem it might cause with your radio. Since the electricity that comes from sunlight moves at the speed of light (instead of the electricity from batteries, which moves much slower) it runs the circuits at a different speed, include the crystal that handles the radio frequency for your R/C unit.

Solar works in other things because there's a person at the controls, but you might have to buy all new crystals of different frequency ranges to be able to use the higher speed solar electrons.

Also, solar electrons are much stickier than battery electrons, so you'd need to put in one of those electrical lint traps (they're the little metal things in plastic you see on phone cords and stuff) and keep it clean by running a magnetized pipe cleaner through it every day.

It's best that you follow Mr. Withey's advice and get an extra battery.

ivanmx6 · 06-26-2008, 05:56 PM

Isn't this the same guy who wanted to fit an alternator to his RC car?

Edit: http://www.mp3car.com/vbulletin/powe...uternator.html

PS. Gullible never was in the dictionary.

Chairboy · 06-26-2008, 06:06 PM

No no, he wanted to fit an 'autonator' to his car, which is a non-Newtonian device unaffected by the limitations of the laws of thermodynamics. Pretty straight forward, but finding enough unobtanium wire to wind the coils is difficult, and the Heisenberg-compensating rectifiers are terribly expensive.

Ausi319 · 06-26-2008, 07:04 PM

yes i cant spell.
but will this work?

how much would a battery that has 1500 mA and will last around 7 mins take for mA for a solar panel?

i need to know that to get one also!

thank you for all ur help.

or i can make my own so the size wont matter as much any help on either?

2k1Toaster · 06-26-2008, 07:10 PM

OMFG you cannot be serious...

As entertaining as this thread is, I think we need to stop this before any more solar panels start to produce light and such.

@OP: No it is not possible. You cannot generate that much power with a solar panel that size to do anything but light up an led really. That is why when you get a solar panel, there are huge arrays of them and they produce diddly squat.

Perhaps a mobile fully enclosed nuclear generator is in order. And you wont need the battery then (or have room for it, that is where the coolant will have to go)

JC-S60 · 06-27-2008, 05:00 AM

Quote: Originally Posted by 2k1Toaster

Perhaps a mobile fully enclosed nuclear generator is in order. And you wont need the battery then (or have room for it, that is where the coolant will have to go)

That was MY idea!

Just do this:

- Get the largest capacity batteries out there that fit the size (1500 isn't much)
- Get a GOOD charger (an intelligent one) that keeps the batteries in optimum condition
- Use one battery pack while you charge the others

If you used google and half your brain, you would have found that solar panels need to be very big for a small amount of power, just like you would have found that the energy needed to spin an alternator requires more electricity than it will generate...

If you don't want to look dumb, you better look up some stuff before asking random questions.

Good luck with the car - it's a fun hobby and you will learn a lot from it if you keep looking for improvements, just don't let this old git's rant discourage you

Joachim

Rob Withey · 06-27-2008, 06:34 AM

Quote: Originally Posted by JC-S60

That was MY idea!

Just do this:

- Get the largest capacity batteries out there that fit the size (1500 isn't much)
- Get a GOOD charger (an intelligent one) that keeps the batteries in optimum condition
- Use one battery pack while you charge the others

And that was MY idea, not like it isn't obvious of course...!

Quote: Originally Posted by Rob Withey

Ok, here's a complately crazy, out-there idea. Get another battery or two, and whilst you are discharging one you can be charging the others. Then when it gets flat just swap them over.

zootjeff · 06-27-2008, 12:02 PM

I'll attempt to answer this dudes question.

"How would solar panels to charge"??? Are you asking, how long would it take solar panels to charge a battery of 1500mAH capacity at 7.2 volts that fits into 2 by 3 inches? Most solar cells are 0.5 volts. You can get some that are amorphous silicon built on a glass substrate that have a higher voltage. You'll be lucky if you get half a watt in that amount space. So if your question is really "how long would it take a solar cell that fits into 2" by 3" that charges a 7.2 volt battery, it would be .5 watts/ 7.2 volts = 70 mili-amps. Assuming your charging a 1500 mili-amp hour battery, then 1500/70 = 21 hours of good sunlight.

Quote: Originally Posted by Ausi319

How would solar panels to charge a 7.2 volt batteries and that go for 1500 milli amps?

can only be around 2" by 3" or 3 1/2"

i'm looking for this to help power my rc car (1/18 scale).
There are 6 batteries to power the motor and i need it to help so i dont have to keep charging the battery and the solar panel can just charge it for me then.

Someone help me with this?
websites.
Ideas.
Anything.
If it will work?

Just please help me

Ausi319 · 06-27-2008, 04:39 PM

what if i made my own solar panel would that help?

any websites u can help me with to find that?

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