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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Oct 31 2007 :  03:22:35 AM  Show Profile  Reply with Quote
Hi
I have made the circuit and with no battery connected it is 7 V at the output terminals
So plz tell me how to check that is it charging or not

Aaron Cake
Administrator

Canada
6718 Posts
Posted - Oct 31 2007 :  09:45:45 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Follow the instructions on the page. This topic may also help:

http://www.aaroncake.net/forum/topic.asp?TOPIC_ID=5435
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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Oct 31 2007 :  11:12:00 AM  Show Profile  Reply with Quote
sorry that discussion didnt answer any of my questions
so plz reply
I have made the circuit and with no battery connected it is 7 V at the output terminals
So plz tell me how to check that is it charging or not
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Nov 03 2007 :  10:27:10 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Have you tried connecting the circuit to a battery and adjusting it as it says on the page? What is the voltage of the battery before you connect the circuit?
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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Nov 04 2007 :  10:13:07 AM  Show Profile  Reply with Quote
Hi
I have Connected it with the battery
The circuit without the battery gives 7.7V.
the voltage of the battery is 12V before it was connected to the circuit.
And After the battery is connected it is 13V

So how may i check that the circuit is charging or not?
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Nov 06 2007 :  09:58:25 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
You answered your own question. Once the battery is connected, it is at 13V. Therefore it is charging. Now follow the instructions on the page to adjust the charge voltage.
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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Nov 07 2007 :  02:55:22 AM  Show Profile  Reply with Quote
thx very much frnd
you helped me a lot
what is your opinion abt connecting an ammeter to the output to measure the charging current.
I am talking abt the null ammeter i.e 10A 0 10A
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sonsy
New Member

Vietnam
1 Posts
Posted - Nov 07 2007 :  04:20:26 AM  Show Profile  Visit sonsy's Homepage  Send sonsy a Yahoo! Message  Reply with Quote
hi! who had designed real time clock circuit with IC 12C887 or M48T86?
please,u can send me if u have it.
thank you very much.
bms
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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Nov 14 2007 :  05:58:38 AM  Show Profile  Reply with Quote
thx very much frnd
you helped me a lot
what is your opinion abt connecting an ammeter to the output to measure the charging current.
I am talking abt the null ammeter i.e 10A 0 10A
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Nov 14 2007 :  09:46:40 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
If you want to use an ammeter, then connect it series with the positive output.
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mohsin_160
Apprentece

Pakistan
9 Posts
Posted - Nov 23 2007 :  11:36:58 PM  Show Profile  Reply with Quote
Hi
What is advice abt cuttoff for a 12V Car Battery
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komala
New Member

India
2 Posts
Posted - Dec 13 2007 :  09:30:22 AM  Show Profile  Visit komala's Homepage  Send komala an AOL message  Send komala a Yahoo! Message  Reply with Quote
quote:
Originally posted by Aaron Cake

Follow the instructions on the page. This topic may also help:

http://www.aaroncake.net/forum/topic.asp?TOPIC_ID=5435

sir can you please give me the detailed description about circuit operation of automatic 12v lead acid battery charger and also the functioning of each component.please sir please reply i am doing my enginering project on this kindly help.
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Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts
Posted - Dec 13 2007 :  1:37:16 PM  Show Profile  Reply with Quote
There is a link in the quote you posted that links to a topic that explains the circuit, look about a quarter of the way down...
Edited by - Binary 1011001101 on Dec 13 2007 1:40:17 PM
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Rizwan
New Member

Pakistan
4 Posts
Posted - Dec 22 2007 :  03:06:28 AM  Show Profile  Click to see Rizwan's MSN Messenger address  Send Rizwan a Yahoo! Message  Reply with Quote
hi,

can u please tell me the largest rating (in Ah) of a 12V battery this charger can charge.

thanx!
Rizwan Ul Ahmad Khan
Edited by - Rizwan on Dec 22 2007 04:43:11 AM
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Dec 22 2007 :  10:20:05 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
It will charge any size battery. But the circuit is limited to about 5A max of current, meaning that it will take a very LONG time to charge high capacity batteries.
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Rizwan
New Member

Pakistan
4 Posts
Posted - Dec 23 2007 :  03:25:49 AM  Show Profile  Click to see Rizwan's MSN Messenger address  Send Rizwan a Yahoo! Message  Reply with Quote
Thanx for the help!

i also want to know how to set the charge voltage. It is explained on the the page where circuit is displayed but i have some confusion.

Do i have to wait until the battery is fully charged to set the charge voltage? if yes then for the first time, how would i know that now the battery is fully charged?

or i can just connect the battery, switch on the charger and measure the voltage on output terminals (which should be 13.8V for 12V battery) and then wait until LED gets ON?

and do i have to use the transformer with secondary voltage of 12V or it be slightly higher i.e 13 - 14V?

thanx!
Rizwan Ul Ahmad Khan
Edited by - Rizwan on Dec 23 2007 03:34:30 AM
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