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Aaron Cake
Administrator
Canada
6718 Posts |
 Posted - Sep 11 2006 : 09:36:11 AM
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There's nothing that I can tell you about Q1 and Q2 that isn't on their datasheets.
Disconnect the anode of Q2 from the circuit...Does the LED still light immediately? |
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ericdhs
Apprentece
11 Posts |
Posted - Sep 13 2006 : 09:23:53 AM
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after i disconnect Q2, the LED light is off. when i put it the other way round, the LED is not light too..
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Sep 14 2006 : 12:34:28 PM
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| Are you sure Q2 is connected right then? Also, you can try a higher value pot other then 100 Ohm... |
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ericdhs
Apprentece
11 Posts |
Posted - Sep 15 2006 : 01:33:57 AM
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ok i will tyr them out..
btw, i will be away for 2 weeks... sory for that...
i will reply as soon as i come back.. |
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vkssingh
New Member
India
1 Posts |
Posted - Sep 28 2006 : 03:57:39 AM
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I have found a simple battery charger circuit at following link
http://www.vt52.com/diy/myprojects/other/charger/charger.htm
I am trying to make it but L200 chip is not available, can anyone tell me the equivalent for L200? Is the charger using LM317/LM350/L200 equally good compared with the circuit idea suggested on Aarons site. Any comments. |
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drilon
Apprentece
Philippines
9 Posts |
Posted - Mar 11 2007 : 11:47:32 AM
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i have a question ^_^
i want to know how the triac and scr works in this circuit
i need your help hehehe |
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kivdenn
Nobel Prize Winner
Uganda
535 Posts |
Posted - May 18 2007 : 07:13:27 AM
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| Hey Guys I would like to modify that schematict to a 24V charger what componnents should I change. Thanks Dennis |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - May 19 2007 : 10:10:20 AM
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quote:
Originally posted by drilon
i have a question ^_^
i want to know how the triac and scr works in this circuit
i need your help hehehe
http://www.aaroncake.net/forum/topic.asp?TOPIC_ID=5954
quote:
Originally posted by kivdenn
Hey Guys I would like to modify that schematict to a 24V charger what componnents should I change. Thanks Dennis
R1, R2, R3 and D3 determine charge voltage. |
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mrenjan
Apprentece
India
19 Posts |
Posted - May 22 2007 : 01:53:47 AM
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L200 is very robust and very good. When the chip is directly used it can handle upto 2 Amps of charging current.
You can use LM317/LM350
or
even 7812 with a 2.2 V pull up Zener diode (or 3 normal diodes in series to act as a zener of 2.1 volt) and proper fuse. This will give an output of 14.2 volt. For constant charging considering the aging factor of Lead acid battery, i suggest 13.6 to 13.8 V charger. |
Renjan |
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kivdenn
Nobel Prize Winner
Uganda
535 Posts |
Posted - May 23 2007 : 07:23:11 AM
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Qute: R1, R2, R3 and D3 determine charge voltage.
Thanke Cake for that response but what values exactly should I use for the components identified. Thanks Dennis |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - May 24 2007 : 09:48:36 AM
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| It's a voltage divider circuit. Search Google for "voltage divider resistor calculator". |
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kivdenn
Nobel Prize Winner
Uganda
535 Posts |
Posted - May 26 2007 : 06:25:59 AM
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| Cake thanks for the reply but you will forgive me I dont know how to use these calculators. Am begging you to do the calculation for me please. What I need are the values of the three resistors. Remember am in Africa. Thanks Dennis |
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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
Posted - May 26 2007 : 07:05:09 AM
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| Just replace R1 with resistors to give a total value of 1090ohms. A 1000ohms and a 100ohms in series will probably be near enough. |
Edited by - pebe on May 26 2007 07:06:43 AM |
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kivdenn
Nobel Prize Winner
Uganda
535 Posts |
Posted - May 26 2007 : 10:47:21 AM
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| How about the zener diode, should I double the zener voltage or I just half it. Thanks |
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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
Posted - May 26 2007 : 11:53:30 AM
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No. Only replace the resistor. That will give the same value at R2 slider for a 24volt battery, as the original R1 did for a 12volt one.
You will, of course, need to change T1 for one with a higher secondary voltage output. |
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Regarding the connection of the charger circuit.
