A question on capacitor
03-23-2004, 11:45 PM
#11
Guest
Posts: n/a
Originally posted by PEI330Ci:
3.) You find out the hard way that caps continually draw a small amount of current when connected to your system. (Battery dead after a week of non use of vehicle)
4.) You accidently reverse the polarity of the Cap connection and have an "accident". (hospital visit)
3.) You find out the hard way that caps continually draw a small amount of current when connected to your system. (Battery dead after a week of non use of vehicle)
4.) You accidently reverse the polarity of the Cap connection and have an "accident". (hospital visit)
Any commercial capacitor sold for the purpose of bolstering the electrical system of a car has a vent plug so that #4 is unlikely [img]smile.gif[/img]
Not arguing for or against caps - that's a personal choice.
03-24-2004, 02:11 AM
#12
1000 Watt CAFz'r
Join Date: Oct 2003
Posts: 1,783
^^^Just a question Dukk, why do caps have resistance if you hold a DMM to their + and - terminals?
And no, I've never had a cap explode on me... although popping the blow off vent can be pretty toxic if you inhale the gases.
Personally I wouldn't go out of my way to install caps in a system after all that this board has taught me. I wish I'd found this place before I spent the $$$$$.
Adam
And no, I've never had a cap explode on me... although popping the blow off vent can be pretty toxic if you inhale the gases.
Personally I wouldn't go out of my way to install caps in a system after all that this board has taught me. I wish I'd found this place before I spent the $$$$$.
Adam
03-24-2004, 04:59 AM
#13
Yankee
Join Date: Oct 2003
Posts: 3,599
^ And it should be a large resistance... if it isn’t large it wouldn’t be a cap. And for you kids at home-do not take a DMM in resistance mode to a charged 1F capacitor the cap will win, you will lose.
I have destroyed screwdrivers forcibly discharging caps (arc cut).
A cap ought not to draw from the battery (leakage shouldn’t happen), the battery will self discharge over time (nature of the lead acid battery)
I have destroyed screwdrivers forcibly discharging caps (arc cut).
A cap ought not to draw from the battery (leakage shouldn’t happen), the battery will self discharge over time (nature of the lead acid battery)
03-24-2004, 05:52 AM
#14
1000 Watt CAFz'r
Join Date: Oct 2003
Posts: 1,783
...yeah the cap always wins [img]smile.gif[/img]
My experience:
I have 2 (two) optima yellow top batteries in my car.
I parked my car for period of storage, and disconnected the power leads to all my audio electronics, and the caps. I had no problem starting the vehicle later on.
Next time I parked my car, I disconnected the power leads to all of my audio equipment, but NOT my caps. My battery was dead later on.
Period of storage both times = 2 weeks.
My caps don't have any lights, meters, or relays attached to them.
I'm not willing to repeat this test for anyones benifit.
My experience:
I have 2 (two) optima yellow top batteries in my car.
I parked my car for period of storage, and disconnected the power leads to all my audio electronics, and the caps. I had no problem starting the vehicle later on.
Next time I parked my car, I disconnected the power leads to all of my audio equipment, but NOT my caps. My battery was dead later on.
Period of storage both times = 2 weeks.
My caps don't have any lights, meters, or relays attached to them.
I'm not willing to repeat this test for anyones benifit.
03-24-2004, 05:17 PM
#15
Yankee
Join Date: Oct 2003
Posts: 3,599
^ shouldnt have happened....hmmmmm
I got one for you, last weekend I did 2 things to my stereo 1) I removed the capacitor and 2) I removed the EQ (it was not hooked into the signal path it just powered up with the stereo). Why did the sound change? I am bamboozled.
I got one for you, last weekend I did 2 things to my stereo 1) I removed the capacitor and 2) I removed the EQ (it was not hooked into the signal path it just powered up with the stereo). Why did the sound change? I am bamboozled.
03-24-2004, 08:29 PM
#16
1000 Watt CAFz'r
Join Date: Oct 2003
Posts: 1,783
^^The Voodoo appears to have jumped from my car into yours. [img]smile.gif[/img]
Here's an idea. Charge that cap up to 13volts and let it sit a day or 2, then measure the voltage. I'd do the test myself, but I'm back in Oman.
Adam
Here's an idea. Charge that cap up to 13volts and let it sit a day or 2, then measure the voltage. I'd do the test myself, but I'm back in Oman.
Adam
