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Author Topic: One BIG capacitor for the power supply  (Read 1082 times)

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vanwatson

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One BIG capacitor for the power supply
« on: December 26, 2014, 06:14:25 pm »
Why did most arcade games use only One big filter capacitor? instead of using multiple filter capacitors?


vanwatson

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Re: One BIG capacitor for the power supply
« Reply #1 on: December 26, 2014, 08:45:22 pm »
They call the Big capacitor in the manuals a condsenser capacitor
it is in parallel with the bridge rectifier before the regulator


Le Chuck

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Re: One BIG capacitor for the power supply
« Reply #2 on: December 27, 2014, 09:57:55 am »
Back in the day the technology wasn't quite up to snuff with regards to power generation and regulation across the circuit board when it came to hot delicious frothy milk for the processors morning latte so a big capacitor was needed to be the condenser and condense the milk from the subordinate or female lactating capacitors.  Once condensed this milk made a tasty treat for the processors to pour into their joe before they started a rough day of whatever it is they do.  Probably sitting around the water cooler berating women.  Kooky 80s tech.  So outdated.   

SavannahLion

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Re: One BIG capacitor for the power supply
« Reply #3 on: December 27, 2014, 10:56:48 am »
Back in the day the technology wasn't quite up to snuff with regards to power generation and regulation across the circuit board when it came to hot delicious frothy milk for the processors morning latte so a big capacitor was needed to be the condenser and condense the milk from the subordinate or female lactating capacitors.  Once condensed this milk made a tasty treat for the processors to pour into their joe before they started a rough day of whatever it is they do.  Probably sitting around the water cooler berating women.  Kooky 80s tech.  So outdated.

 :laugh2:

vanwatson

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Re: One BIG capacitor for the power supply
« Reply #4 on: December 30, 2014, 10:39:43 pm »
the Big caps values ranges from 10,000uF to 26,000 uf.

Why do they use cause a large value for what reason to filter out RF and EMF ?

ed12

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Re: One BIG capacitor for the power supply
« Reply #5 on: December 30, 2014, 11:17:06 pm »
no rf or emf
the reason was handed to u in a post below

ed
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vanwatson

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Re: One BIG capacitor for the power supply
« Reply #6 on: December 31, 2014, 12:43:47 am »
im sorry , can you please explain it again i don't get it


ed12

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Re: One BIG capacitor for the power supply
« Reply #7 on: December 31, 2014, 12:52:33 am »
>Back in the day the technology wasn't quite up to snuff with regards to power generation and regulation across the circuit board<

u missed that part in the @'s poke at u

ed
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vanwatson

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Re: One BIG capacitor for the power supply
« Reply #8 on: December 31, 2014, 01:09:13 am »
but the Big CAP is After the Rectifier diodes and before the Regulator


Rectifier diodes--BIG CAP--Regulator---Filter caps


See how the BIG cap is before the regulator and filter caps ?

The Big CAP is not a filter cap, it's filtering out something else or acting as a storage capacitance, if the power AC is interrupted , the arcade game will stay on

 

ed12

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Re: One BIG capacitor for the power supply
« Reply #9 on: December 31, 2014, 01:17:41 pm »
dude u just do not get it
the big cap is a filter
right after the rect. before the reg,hence big ass filter
dc filter

ed
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Vigo

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Re: One BIG capacitor for the power supply
« Reply #10 on: December 31, 2014, 01:39:47 pm »
In the 80's, having a giant capacitor was the best way to pimp your tech.



vanwatson

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Re: One BIG capacitor for the power supply
« Reply #11 on: December 31, 2014, 02:14:26 pm »
They have filter caps after the regulator

Why have filter caps before the regulator?

The filter caps after the regulator filter the DC

The filter cap before the regulator filters the DC

So what is the difference? causing a cap before the regulator compared to using a cap after the regulator?

lilshawn

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Re: One BIG capacitor for the power supply
« Reply #12 on: December 31, 2014, 02:23:34 pm »
because the regulator isn't INSTANT acting when the power load starts to dip. capacitors are.

regulator handles the gross voltage changes the cap filters out the tiny changes in voltage to smooth it out. Large values (1,000's of uF) can supply huge current while the regulator acts to adjust the voltage....smaller caps (10's and 100's of uF) can fill out little ripples and harmonics in the power feed.

vanwatson

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Re: One BIG capacitor for the power supply
« Reply #13 on: December 31, 2014, 07:13:33 pm »
so the big cap acts like a storage battery? it's stores all the voltage and current

Quote
because the regulator isn't INSTANT acting when the power load starts to dip. capacitors are.

The Regulator has a time delay to voltage dips

The Big Cap will do what with the regulator to help with the instant acting?

Quote
smaller caps (10's and 100's of uF) can fill out little ripples and harmonics in the power feed.

yes i understand this

I just don't understand how the Big cap before the regulator does what with the regulator , it helps the regulator out somehow with input line regulation


ed12

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Re: One BIG capacitor for the power supply
« Reply #14 on: December 31, 2014, 08:09:31 pm »
a cap is a big storage device
the larger the mf's/uf's the better
so when a load is placed on a supply the cap can use the stored engry and keep
the line voltage stable

ed
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Re: One BIG capacitor for the power supply
« Reply #15 on: February 12, 2015, 02:12:00 pm »
I think I figured you out Ed. You're posting from a pager, aren't you?!

lilshawn

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Re: One BIG capacitor for the power supply
« Reply #16 on: February 12, 2015, 02:45:53 pm »
u get old & time is of the essence.
we srt using abbr for things cuz we dunno how much time left.
this is why we get ornery too.

ofa my grass!

BobA

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Re: One BIG capacitor for the power supply
« Reply #17 on: February 12, 2015, 05:54:27 pm »
vanwatson is a waste of time and storage space. :soapbox:

Ken Layton

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Re: One BIG capacitor for the power supply
« Reply #18 on: February 12, 2015, 05:56:18 pm »
vanwatson is a waste of time and storage space. :soapbox:

I agree 100%