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oliver
Starting Member
United Kingdom
19 Posts |
 Posted - 26/02/2008 : 09:09:41
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Ok, I like to say that I have managed to build a little Voltage doubler (from Maplin).
Yesterday I connected all the parts, the 12V battery was at 8.7V.
You may noticed that yesterday evening was windy.... today I tested the battery and is now at 11.3V, so I think it is working some how! :0).
I'm pleased!.... soon I will finally be able to charge my mobile-phone.
Hope Jonny will read this message... I'm interested to buy from you a hub, possibly in aluminum... i sent you a private message with the size of my arbour. Please let me know.
Kind regards to all
oliver
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donniedingle
Junior Member
United Kingdom
102 Posts |
Posted - 26/02/2008 : 10:13:55
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Hi Oliver,
Well done, its a great feeling when you see the meter start to climb, and then you know your harvesting that free power.
regards Donnie.
just keep her spinning.. |
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gotwind
Forum Admin
United Kingdom
936 Posts |
Posted - 26/02/2008 : 20:56:41
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Oliver.
I think that if a 12v battery is reading 8.7 volts it is pretty much dead and not much use.
Clarification by others would be helpful.
Ta.
Ben
The Futures Green - Getwind of it. |
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donniedingle
Junior Member
United Kingdom
102 Posts |
Posted - 26/02/2008 : 21:16:55
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yes i'd agree with you there ben, i'd try charging it by other means too and see if it will take a charge, only delicate components in that circuit and a shame to burn it out due to a duff battery.
donnie.
just keep her spinning.. |
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oliver
Starting Member
United Kingdom
19 Posts |
Posted - 27/02/2008 : 09:06:22
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I don't think the battery is dead.
I bought it new at Maplin..... how come you think is dead?, I have used it twice in my room with a bicycle light in the evening and discharge it with the light all day long.
Anyway I tested again the battery this morning and is still 11.2V, so not 12V yet 
Regards
oliver |
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dc2000
Starting Member
16 Posts |
Posted - 27/02/2008 : 09:54:25
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I think Ben is refering to lead acid or gel batteries which at 10.5 volts would be considered 100% discharged was the battery sold to you with a full charge if so then you have over disscharged it I would recommend only disscharging 50% down to 12.2v this will give longer battery life |
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gotwind
Forum Admin
United Kingdom
936 Posts |
Posted - 27/02/2008 : 21:31:52
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Oliver.
A little homework is required.
Sorry to sound negative, but most information is just a Google search away, this for example.
http://www.batteryuniversity.com/index.htm
I will admit, I am one of the worst for wanting a quick answer, but sometimes you have to read and understand a few basics to move on further.
I am still learning, daily thanks to others and my best friend Google...
I set my homepage to Google - I am always surprised that friends I have that don't.
Ben. |
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My Dyno hub wind turbine
