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#1
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
I recently removed my system from one car and in the process of installing
it in another one. I cannot remember if I even charged my 3 farad cap when I first bought it, or just hooked the wires straight in to it, but it was reading 11-13 V all the time when the system was running. Does this means it was working properly? Now that I removed it from constant power, would I need to charge it slowly with a light?? How exactly do I do this? Or would it be ok just plugging it in to the battery power? Thanks. |
#2
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
You can hook the postive and negative wires straight to the cap, no problem.
The reason most caps included resistors for this processs is because of the large spark that usually occurs when contact with the battery and the cap is first made (keep in mind, a cap can INSTANTANTLY swallow TONS of current and this is what produces the large spark). But as long as you realize this and take some precautions (like eye protection), there is no reason why you HAVE to use any type of resistor to charge your cap (of course, the whole process of charging does not even need to be done as the cap will obviously be charged when hooked up to the system). If you feel safer using a resistor, this group's FAQ at: http://www.mobileaudio.com/rac-faq/ can give you the proper resistor values you will need. MOSFET "rcjesse" wrote in message news:ZQSFg.422$TA5.284@fed1read09... I recently removed my system from one car and in the process of installing it in another one. I cannot remember if I even charged my 3 farad cap when I first bought it, or just hooked the wires straight in to it, but it was reading 11-13 V all the time when the system was running. Does this means it was working properly? Now that I removed it from constant power, would I need to charge it slowly with a light?? How exactly do I do this? Or would it be ok just plugging it in to the battery power? Thanks. |
#3
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
Thanks. You are always a great contributor to everyones questions.
"MOSFET" wrote in message ... You can hook the postive and negative wires straight to the cap, no problem. The reason most caps included resistors for this processs is because of the large spark that usually occurs when contact with the battery and the cap is first made (keep in mind, a cap can INSTANTANTLY swallow TONS of current and this is what produces the large spark). But as long as you realize this and take some precautions (like eye protection), there is no reason why you HAVE to use any type of resistor to charge your cap (of course, the whole process of charging does not even need to be done as the cap will obviously be charged when hooked up to the system). If you feel safer using a resistor, this group's FAQ at: http://www.mobileaudio.com/rac-faq/ can give you the proper resistor values you will need. MOSFET "rcjesse" wrote in message news:ZQSFg.422$TA5.284@fed1read09... I recently removed my system from one car and in the process of installing it in another one. I cannot remember if I even charged my 3 farad cap when I first bought it, or just hooked the wires straight in to it, but it was reading 11-13 V all the time when the system was running. Does this means it was working properly? Now that I removed it from constant power, would I need to charge it slowly with a light?? How exactly do I do this? Or would it be ok just plugging it in to the battery power? Thanks. |
#4
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
yeah, he is. and now that the great question answerer is here, I have a question about this itchy rash... -- KU40 |
#5
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
"KU40" wrote in message ... yeah, he is. and now that the great question answerer is here, I have a question about this itchy rash... Two words: Gold Bond. MOSFET |
#6
Posted to rec.audio.car
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How do I RE-CHARGE a cap ??? Do I need to ??
"MOSFET" wrote in message
... You can hook the postive and negative wires straight to the cap, no problem. The reason most caps included resistors for this processs is because of the large spark that usually occurs when contact with the battery and the cap is first made (keep in mind, a cap can INSTANTANTLY swallow TONS of current and this is what produces the large spark). But as long as you realize this and take some precautions (like eye protection), there is no reason why you HAVE to use any type of resistor to charge your cap (of course, the whole process of charging does not even need to be done as the cap will obviously be charged when hooked up to the system). If you feel safer using a resistor, this group's FAQ at: http://www.mobileaudio.com/rac-faq/ can give you the proper resistor values you will need. MOSFET Of coruse, calculating such resistor values is really a lot of work for such a simple and short-lived task... the easy way is just to put a regular automotive light bulb in series with the cap and leave it there until the bulb goes out, as suggested in the FAQ. |
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