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Author Topic: Voltage converter from 26vdc to 12vdc  (Read 908 times)
Rene
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« on: May 29, 2010, 07:21:05 AM »

Mga bosing meron ba kayong alam na DC Voltage converter from 26vdc to 12vdc? Meron kasi akong power supply kaso 26vdc 25amps. and output nya. Gusto ko sna gmitin sa 12 volts na apl. like car stereos etc...
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« on: May 29, 2010, 07:21:05 AM »

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marcelino
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« Reply #1 on: May 29, 2010, 08:47:44 AM »

you could make a LM317 with transistor pass (to accommodate higher current). just like this one:



or you could use dc-dc converter. I use L4971 and MC34063A based circuits.

If your interested on either option, just check its datasheet. nandun na po lahat! Wink
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try this_


« Reply #2 on: May 29, 2010, 10:10:49 AM »

pwedi mo rin bawasan yung secondary windings to make 12v...
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rgv101
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« Reply #3 on: May 29, 2010, 03:37:22 PM »

kung 220v input plug mo sa 110v para maging 13v yung 26v. pede na sa car stereo yan...
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« Reply #4 on: June 28, 2010, 11:22:16 AM »

kung 220v input plug mo sa 110v para maging 13v yung 26v. pede na sa car stereo yan...

oo nga no.  simpleng solution.  proportional nga pala yung input sa output ng transformer.  kalahating input means kalahati din yung output. kailangan lang may 110v line ka sa bahay.

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Rene
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« Reply #5 on: June 29, 2010, 05:23:01 AM »

oo nga no.  simpleng solution.  proportional nga pala yung input sa output ng transformer.  kalahating input means kalahati din yung output. kailangan lang may 110v line ka sa bahay.



Paano po kaya autovolt sya from 90-260vac huhuhuh....merong nabibili na dc step down converter specially design pra dto kaso cnt afford masyadong mahal, plibhasa ksi binigay lng saken to ng cozin ko..
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rgv101
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« Reply #6 on: June 29, 2010, 08:09:37 AM »

Paano po kaya autovolt sya from 90-260vac huhuhuh....merong nabibili na dc step down converter specially design pra dto kaso cnt afford masyadong mahal, plibhasa ksi binigay lng saken to ng cozin ko..

smps pala yan, so di pede suggestion ko...

yung ke marcelino ok yan kung kaya mo gumawa

... or post mo schematic or parts ng ps mo baka me option pa iba...
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rdpzycho
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« Reply #7 on: June 29, 2010, 10:51:37 AM »

anong tatak niyan? meron din akong supply dati na 24V 27A (nabigay ko na sa isang technician sa pinapasukan ko dati), nakalimutan ko na 'yung tatak pero sa e-gizmo ko nabili few years ago (nasa Morayta pa sila Grin). merong trimmer para i-adjust 'yung voltage at kaya niya ma-adjust from 14V to 36V.

kung wala mang trimmer 'to sa labas, malamang merong setting sa loob. pero kung compact 'tong supply na 'to, malamang mahirap 'tong hanapin sa loob.
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« Reply #8 on: June 29, 2010, 06:30:00 PM »

anong tatak niyan? meron din akong supply dati na 24V 27A (nabigay ko na sa isang technician sa pinapasukan ko dati), nakalimutan ko na 'yung tatak pero sa e-gizmo ko nabili few years ago (nasa Morayta pa sila Grin). merong trimmer para i-adjust 'yung voltage at kaya niya ma-adjust from 14V to 36V.

kung wala mang trimmer 'to sa labas, malamang merong setting sa loob. pero kung compact 'tong supply na 'to, malamang mahirap 'tong hanapin sa loob.

Tatak po nya Analytic Systems p/n: PWS1510MS-26.0..binuksan ko sya kelan lng kso yung mga parts nya sealed ng prang clear na plastic glue.
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rdpzycho
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« Reply #9 on: June 29, 2010, 11:58:22 PM »

^ walang kahit anong trimmer sir? kung ganun, 'di na nga magagalaw voltage niyan, unless, baklasin 'coating.
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Rene
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« Reply #10 on: June 30, 2010, 04:56:24 AM »

^ walang kahit anong trimmer sir? kung ganun, 'di na nga magagalaw voltage niyan, unless, baklasin 'coating.

hehe ang tigas nung coating sir bka masira yung mga parts pag pinilt ko...pero sayang din kung di mgamit hehe mukhang mgandang klase p nmn.. kung gusto  mo bgay ko sayo yung isa dalawa to pag aralan mo and let me know kung pwede gwan ng paraan.
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« Reply #11 on: July 01, 2010, 09:45:34 AM »

minsan ginagawa ko, tinutusok ko ng soldering iron yung coating tapos unti unting tanggalin pero depende sa coating.   
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Rene
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« Reply #12 on: July 02, 2010, 07:12:41 AM »

minsan ginagawa ko, tinutusok ko ng soldering iron yung coating tapos unti unting tanggalin pero depende sa coating.   

E-try ko n lng po bka pwede..cge mga sirs slamat sa mga reply nyo.
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rdpzycho
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« Reply #13 on: July 02, 2010, 03:24:49 PM »

^ tignan niyo muna sir kung merong trimmer malapit doon sa output. kung wala, huwag niyo ng kutkutin baka masira lang. Wink
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« Reply #14 on: August 23, 2010, 05:01:39 AM »

masyadong malaki ang output current (25amps).. pero kung under 1 amp lang ang kukunin mo jan, i think pinaka simple ang LM7812..

look here http://www.reuk.co.uk/High-Current-Voltage-Regulation.htm
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bravokilo
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« Reply #15 on: August 31, 2010, 07:36:14 PM »

Yung kay Ate Marce maganda. kaya lang, to drop it to 14V para sa car stereo, 26-14=12V at kung full 25 amp and draw, that will be 12x25 watts of heat! What yu can do is to eithr use a dropping resistor bago yun VR or CASCADE several VRs(Voltage regulators). Perhaps in 3 steps, drop it to 22V, then to 18V, then to 14V. parejo din and heat generation yan pero ma spread and load among 3 VRs. Pero, sis, kung malaki ang gastos at hindi naman 25 amps and kailangan, just buy SMPS for computers, maybe P700 can get 17 amps dun sa +12V line. Tapos load up the 5V line with a 6V auto bulb(yung pang lumang VW).

BK
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