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Author Topic: Power Supply Question  (Read 1566 times)

Offline TechG

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Power Supply Question
« on: May 17, 2012, 12:15:09 AM »
ano po yung mga type ng powersupply circuit.

Full Wave Bridge Rectifier
for VAC to +-VDC
VAC x 1.414 = VDC

what if po pag 12-0-12vac yung transformer then ang need ko na output is 12vdc
after rectifier is mag x1.414 pa yun dba.

pag half wave ilan ang magging vdc

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Power Supply Question
« on: May 17, 2012, 12:15:09 AM »

Offline Disabled

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Re: Power Supply Question
« Reply #1 on: May 17, 2012, 12:17:31 AM »
x 0.707
tama ba?
kung gusto mo maging 12VDC talaga, gamit ka nang regulator na LM/KA/AN7805
pero 1A lang max, kung gusto mag exceed, gagamit ka na nman ng Pass Transistor ;D
kaso may drop yan, kailangan mo pa i adjust.

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Re: Power Supply Question
« Reply #1 on: May 17, 2012, 12:17:31 AM »

Offline BhongTech

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Re: Power Supply Question
« Reply #2 on: May 17, 2012, 12:25:06 AM »
sa half wave same pa rin ang dc output > 12vacX2(CT) =16.968vdc.

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Re: Power Supply Question
« Reply #2 on: May 17, 2012, 12:25:06 AM »

Offline TechG

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Re: Power Supply Question
« Reply #3 on: May 17, 2012, 12:45:00 AM »
sa 12-0-12vac na source pwede ba ako magkaroon ng output na 24vdc

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Re: Power Supply Question
« Reply #3 on: May 17, 2012, 12:45:00 AM »

Offline BhongTech

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Re: Power Supply Question
« Reply #4 on: May 17, 2012, 12:54:49 AM »
pwede sir yung ct balewala na ito.bale fullwave bridge rectifier ang gagawin mo sir.

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Re: Power Supply Question
« Reply #4 on: May 17, 2012, 12:54:49 AM »

Offline TechG

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Re: Power Supply Question
« Reply #5 on: May 17, 2012, 01:05:48 AM »
paano po ang gagawin para maging 24vdc output nya?

Offline kaiky14

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Re: Power Supply Question
« Reply #6 on: May 17, 2012, 04:41:13 AM »
ung dalwang 12v dun mo kabit ung bridge diode mo.

Offline enriz622

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Re: Power Supply Question
« Reply #7 on: May 17, 2012, 08:53:31 AM »
sub

Offline j a y k e z

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Re: Power Supply Question
« Reply #8 on: May 17, 2012, 09:22:07 AM »
paano po ang gagawin para maging 24vdc output nya?

ganito  :D


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Re: Power Supply Question
« Reply #9 on: May 17, 2012, 11:41:34 AM »
Check muna kung magiging 24VAC ang output sa magkabilang dulo ng 12 - 12.
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Offline Disabled

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Re: Power Supply Question
« Reply #10 on: May 17, 2012, 01:45:53 PM »
hehe  * 1.414 pa yan ;D

Offline Tukkar

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Re: Power Supply Question
« Reply #11 on: May 17, 2012, 03:18:37 PM »
24vac x 1.414=33.9vdc minus around 1 volt for diode drop this is appoximately 32vdc unloaded...pag nagload ka maari pang bumaba ito hangang 28v depends on the filter caps at load na gagamitin mo.....to make the 24 v better regulate it.
Pag gusto maraming paraan, pag ayaw maraming dahilan!!!!...

Offline mcleod

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Re: Power Supply Question
« Reply #12 on: May 17, 2012, 03:25:49 PM »
x 0.707
tama ba?
kung gusto mo maging 12VDC talaga, gamit ka nang regulator na LM/KA/AN7805
pero 1A lang max, kung gusto mag exceed, gagamit ka na nman ng Pass Transistor ;D
kaso may drop yan, kailangan mo pa i adjust.

baka 7812 ibig mong sabihin, di po ba 7805 pang 5 v regulator lang?
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Offline Tukkar

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Re: Power Supply Question
« Reply #13 on: May 17, 2012, 03:29:12 PM »
baka 7812 ibig mong sabihin, di po ba 7805 pang 5 v regulator lang?

tama ka sir.....7812 kung 12v ang gusto....
Pag gusto maraming paraan, pag ayaw maraming dahilan!!!!...

Offline Disabled

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Re: Power Supply Question
« Reply #14 on: May 17, 2012, 05:16:00 PM »
^ hahaha salamat sa correction +1 ;D

Offline jyjc

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Re: Power Supply Question
« Reply #15 on: May 18, 2012, 12:16:19 AM »


magkaiba ba ang output Voltage nyang dalawa or same lang?
what is the difference?

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Re: Power Supply Question
« Reply #16 on: May 18, 2012, 04:40:11 AM »


magkaiba ba ang output Voltage nyang dalawa or same lang?
what is the difference?
1st pic
24 * 1.414 = 33.936
2nd pic
12 * 1.414 = 16.968 (per rail) ibig sabihin ung may center tap
16.968 * 2 = 33.936

Offline Tukkar

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Re: Power Supply Question
« Reply #17 on: May 18, 2012, 09:49:45 AM »
yung una eh single polarity supply with 33.9v ,,,yung pangalawa eh split power supply kasi me positive at negative ouputs ka....pag ang ginamit mo eh yung + at saka yung - ay same voltage output parin...yung negative ang magiging ground mo.pero i hang mo na lang yung center tap para di mashort.....
Pag gusto maraming paraan, pag ayaw maraming dahilan!!!!...

Offline TechG

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Re: Power Supply Question
« Reply #18 on: May 19, 2012, 02:21:28 AM »
example for FAN na 12vdc.

pag 1st pic ang gagamitin ko dapat 4.5-0-4.5vac center tap
para 4.5x2=9 then after reftification is 12vdc

kung yung 2nd pic ang gagamitin ko ang 9-0-9vac ang source.Positive and ground yung negative hang lang. para 12vdc

meron din bang hindi center tap na trans like 9-0vac or 4.5-4.5vac.

Offline louiex

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Re: Power Supply Question
« Reply #19 on: May 19, 2012, 10:03:54 AM »
meron yan sir...

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Re: Power Supply Question
« Reply #19 on: May 19, 2012, 10:03:54 AM »

 

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