Voltage Stabilizer Installation
#25
real VS ,not jus CAps
Originally Posted by Kong
No, I didn't get it. Please resend.
#26
Dude, you can't use regulator. You will loose power. For example, if your car need 3A of current and you have a 12V regulator, you will lose (14-12)*3=6W of power at the regulator. If there is no ventilation around the heatsink, the regulator will heat up very quickly and fail.
The cap works as the powe supply filter, it reduces the voltage ripple so that the overall electric system has less noise. Many part in the car relies on electrical sensor, and noise cause error in sensor readings -> error in fuel/air ratio. The cap indirectly reduce error from noise coupling through power supply.
The cap works as the powe supply filter, it reduces the voltage ripple so that the overall electric system has less noise. Many part in the car relies on electrical sensor, and noise cause error in sensor readings -> error in fuel/air ratio. The cap indirectly reduce error from noise coupling through power supply.
#27
Originally Posted by Kong
Dude, you can't use regulator. You will loose power. For example, if your car need 3A of current and you have a 12V regulator, you will lose (14-12)*3=6W of power at the regulator. If there is no ventilation around the heatsink, the regulator will heat up very quickly and fail.
The cap works as the powe supply filter, it reduces the voltage ripple so that the overall electric system has less noise. Many part in the car relies on electrical sensor, and noise cause error in sensor readings -> error in fuel/air ratio. The cap indirectly reduce error from noise coupling through power supply.
The cap works as the powe supply filter, it reduces the voltage ripple so that the overall electric system has less noise. Many part in the car relies on electrical sensor, and noise cause error in sensor readings -> error in fuel/air ratio. The cap indirectly reduce error from noise coupling through power supply.
#29
Originally Posted by Kong
OK, I'm not a electrical engineer, but I would love to know what current four little electrolytic capacitors can supply that a full-size lead-acid starting battery cannot. I wasn't aware of any great current time-lag, or internal resistance losses in such a battery.
Also, wouldn't it be easier to use one larger capacitor instead of several smaller caps in parallel?
I use 16V caps because I can get higher capacitor values. It is more compact and cheaper ;) . Yes, the battery is running at 14V and It won't go above that, unless there is something wrong with the alternator and the battery will be damaged anyway. I was first thinking about using the 25V caps, then I find justifications to use the 16V caps instead. The capacitor can withstand voltage ripple of more than 16V, but it cannot withstand "steady" voltage of more than 16V, so it should be safe.
The main reason I make this myself is that I want to know if it works without spending too much money on it.
#31
Originally Posted by Kong
when you start the engine, the voltage actually drop slightly. You can see that the lights are dimmer when you start the car.
#34
re: DIY VS failure(kanasai)
Originally Posted by Kong
10,000uF for the electrolytic caps and 100uF for the ceramic caps.
#37
Re: re: DIY VS failure(kanasai)
Originally Posted by ufo
Originally Posted by Kong
10,000uF for the electrolytic caps and 100uF for the ceramic caps.
The electrolytic caps might have been broken. Did you have the right polarity? The electolytic cap has positive and negative terminals. If you switch the terminal and connect to battery, it will die. When it is broken, it make a short connection to your battery. It could have been the ceramic capacitor, make sure that it is rated 16V or above.
I bought caps from Digikey.com . you can also use several ceramic capacitors combined in parallel.
I have been using it for 4 months now and it works just fine. I made several sets for my friends and no one has problem with it.
If you need help immediately, pm me. I haven't visit the forum for quite a while.
If you guys are around DC, I have a set unused. We can meet and try it out.
#38
Re: re: DIY VS failure(kanasai)
Originally Posted by Kong
Originally Posted by ufo
Originally Posted by Kong
10,000uF for the electrolytic caps and 100uF for the ceramic caps.
The electrolytic caps might have been broken. Did you have the right polarity? The electolytic cap has positive and negative terminals. If you switch the terminal and connect to battery, it will die. When it is broken, it make a short connection to your battery. It could have been the ceramic capacitor, make sure that it is rated 16V or above.
I bought caps from Digikey.com . you can also use several ceramic capacitors combined in parallel.
I have been using it for 4 months now and it works just fine. I made several sets for my friends and no one has problem with it.
If you need help immediately, pm me. I haven't visit the forum for quite a while.
If you guys are around DC, I have a set unused. We can meet and try it out.
#39
Re: re: DIY VS failure(kanasai)
Originally Posted by ufo
Originally Posted by Kong
Originally Posted by ufo
Originally Posted by Kong
10,000uF for the electrolytic caps and 100uF for the ceramic caps.
The electrolytic caps might have been broken. Did you have the right polarity? The electolytic cap has positive and negative terminals. If you switch the terminal and connect to battery, it will die. When it is broken, it make a short connection to your battery. It could have been the ceramic capacitor, make sure that it is rated 16V or above.
I bought caps from Digikey.com . you can also use several ceramic capacitors combined in parallel.
I have been using it for 4 months now and it works just fine. I made several sets for my friends and no one has problem with it.
If you need help immediately, pm me. I haven't visit the forum for quite a while.
If you guys are around DC, I have a set unused. We can meet and try it out.
Is anybody else tried thing? matchbox and ufo are the only two person I know that make sets for their car.
#40
vs
wow, almost forgot this forum, booted my PC then forgotten this forum :D, anyway, i haf some suggestion KONG, use a better CAPS can improve our VS, suggestion , a better cap RUBYCON BLACKGATE. its expensive thou but am sure this caps works well. anyway kong .. dun haf the 100 uF ceramic caps u mentions, the market doesnt even haf this type of caps, thks anyway