williB

can you post the link to your solar panel..?
some have the diode built in...

devonsc

Real sorry as I do not have the link to the solar panel that I've bought. I've bought the solar panel in a local company without any specification sheet and according to the technician, there isn't any circuitry that comes together with the solar panel

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williB

does it have a name.?

devonsc

Btw, would like to ask if theres any recommended books or websites that I can read up or refer to analyze a specific circuit? Any books that teaches analyzing a circuit from scratch?

I believe its going to be real hard for me to ask questions regarding the function of certain portion in a circuit through a forum

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devonsc

ops: errr....theres no name nor brand.
they just call it

12V Car Battery Charger

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devonsc

ops: errr....I guess this is not the right way purchasing components...buying stuffs without specification sheet and all. But I was thinking that it's cheap and it comes with a 12 months warranty, so I decided to buy from this company

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williB

by analyze do you mean a circuit analysis program with output plots?

williB

i have to go out ..its a beautiful day in NJ today..talk later..

devonsc

Sorry, I'll re-phrase that: I mean, analyze as in there are certain portion of the circuit where I don't understand the need of the presence of certain capacitors as well as resistors. Erm...Anyway, I'll try "reading" the circuit again and again

*sigh* ops: lots to learn...

Thanks again for you guys' support.

Enjoy urday in NJ

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devonsc

Would like to ask about the inputs of certain circuits, it seems like most of the time, the requirements stated for a specific input of a circuit that can be easily found on books as well as websites are only the voltage input.

Does this mean that one do not need to take the current supplied into consideration?

Sorry if this is another nonsense ops:

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Nigel Goodwin

It doesn't make any sense because it's too general, you need to ask specific questions.

Your question as it stands is like expecting a couple of paragraphs to give you a three year electronics course!.

But for a precise answer "yes, no, sometimes, may be" :lol:

As your knowledge seems so limited, I'm puzzled as to why you have embarked on such a complicated project? - I'd presumed you were nearing the end of an Electronics course, and this was your teams final project?.

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devonsc

Err... ops:

Ok, ok, sorry. At this moment, I'll first find out about the charging current.

I'll try not to ask anymore stupid question :cry:

Thanks a lot...

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williB

have you got a particular circuit in mind?

devonsc

Hi! The result of the charging current :

Battery used : 12V (as this is what I have at this moment)
Voltage (open circuit) : 19.50V
Charging current approximately : 4.55mA

Does this mean that I'm going to take hundreds of hours to charge a 3400mAH battery?

Does this mean that the solar panel that I've bought is not suitable for my project? :cry:

About the charging circuit, I found this circuit in => http://www.uoguelph.ca/~antoon/circ/circuits.htm

But it seems like this circuit is no longer posted there when I checked today. Anyway, the following is the attached file:

Any comments about the charging current as well as the charging circuit? I hope genius like you guys could help me out in analyzing the circuit. Err, sorry if I'm not suppose to ask in this manner ops:

Thanks...

Attached Images

untitled_123.jpg (47.8 KB, 277 views)

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williB

you have another way to charge the battery, right ?
you could tell your teammates that the best way to charge the battery is to just put a reverse current diode in there... and start working on the battery monitoring circuit...which will be much more fun..and educational in the long run .In My Opinion.