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Author Topic: Converting Unregulated to Regulated Power Supplies.  (Read 4072 times)

Offline danleo

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Converting Unregulated to Regulated Power Supplies.
« on: April 17, 2007, 09:27:51 PM »
Mga Sir, tanong ko lang possible po ba maconvert ung Generic Adaptor Unregulated power supply to Regulated power supply? If pwde po, ano po pwede palitan or dagdagan pra maging regulated? Pakipost na lang po ng step by step poto or schematics if meron. Thanks in advance.


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Offline Al_Librero

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #1 on: April 17, 2007, 11:00:40 PM »
you'll need to add a regulator.

hehehe... medyo pilosopo ang dating, but it's true. you'll need an LM7809 or LM317 regulator. and chances are you'll need a new circuit board for that. pag minalas di pa magkakasya sa existing adaptor housing mo.

so, in many cases, it's better to just buy a new regulated power supply altogether or build one from the ground up.
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Offline turiguiliano

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #2 on: April 18, 2007, 12:43:27 AM »
if its for you pedals, pagawa ka nalang ng custom power supply - Kalikot Audio - 0922.8245359.
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Offline danleo

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #3 on: April 18, 2007, 01:06:59 AM »
Thank you po mga sir for the replies. :)
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Offline doremi

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #4 on: April 05, 2008, 09:54:23 PM »
mga sir! hehe, sorry kung matagal n tong thread n toh pero, may pang noob n question ako ee, .anu po ba pinagkaiba ng regulated at unregulated n psu??? ...kasi lahat po ng psu ko unregulated e, ayos lang po b yun?? .......grabe natatakot ako, baka sinisira ko n pala mga epeks ko  :-ss haha


Offline markitut

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #5 on: April 05, 2008, 11:12:47 PM »
regulated means sakto ang voltage na lalabas sa supply mo..
filter nia yung sobra voltage pra sakto sa paglabas..

halimbawa mg 12volts ka na input, then pinadaan mo sa regulator, na limit voltage(tama ba ang term?) eh 9 volts, 9volts lng ang lalabas..

hehe.. yun ang alam ko.. kasi sa school madalas namin gamitin yan kasi yung chip na ginagamit namin only need 5 volts, pag accidente tumaas ang voltage input mo, masisira ang chip..

palagay ko ganun rin ang gamit nito sa mga adaptors natin..


Offline BAMF

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #6 on: April 06, 2008, 12:01:50 AM »
Dali lang. Cut the + wire. Then get a 7809 voltage regulator from Deeco. The configuration of this is In-Ground-Out. So yung pinutol mong wire, connect the In of the 7809 to the wire that goes to the adaptor. Then connect the Out pin to the crown jack side. Yung gitna, yung ground, connect that to the - wire of the adapter. Fancy putting a heatsink or not, and that's it.

Make sure the adapter you're converting is at least 9VDC unregulated or better, 12VDC unregulated. The 7809 needs about 2.5 volts of "burn" voltage. 9VDC unregulated will spit out 12 volts or so at no-load condition, but if you start off with a 12VDC unregulated (around 16 volts DC out at no-load) , your output will be cleaner and quieter, although the pitfall is mas mabilis mag-init ang regulator mo and you might really need a heatsink. Me nabibili namang slip-on types.
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Offline doremi

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #7 on: April 06, 2008, 12:40:22 AM »
edi ba po may selector naman po yun? pag sinet mo ng 9volts edi pirme siyang naka 9 volts lang :-D

Offline BAMF

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #8 on: April 06, 2008, 01:41:44 AM »
edi ba po may selector naman po yun? pag sinet mo ng 9volts edi pirme siyang naka 9 volts lang :-D

7809 is a fixed voltage regulator. No need for output voltage selector because it is useless if all you use is a 7809.

9 volts is what is usually needed anyway.
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Offline markitut

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #9 on: April 06, 2008, 07:20:41 AM »
sir so you mean sa mga custom na PSU, transfromer lang at mga voltage regulator lang ang laman?? ganun po ba yun?

Offline hardcore misery

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #10 on: April 06, 2008, 08:55:29 AM »
sir so you mean sa mga custom na PSU, transfromer lang at mga voltage regulator lang ang laman?? ganun po ba yun?

syempre andun na yung mga filter capacitors para smooth ang ripple voltage ng PSU mo (mas malaki ang capacitance, mas ok)
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Offline BAMF

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #11 on: April 06, 2008, 10:39:44 AM »
syempre andun na yung mga filter capacitors para smooth ang ripple voltage ng PSU mo (mas malaki ang capacitance, mas ok)

Nakalimutan mo yung rectifiers :D .

Yung iba meron pang line-side varistors for spike filtering.
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Offline hardcore misery

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #12 on: April 06, 2008, 02:07:47 PM »
Nakalimutan mo yung rectifiers :D .

Yung iba meron pang line-side varistors for spike filtering.

hahaha... tama!

add-ons: EMI/RFI filter at AC filter(la pa akong idea dito :-()
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Offline markitut

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #13 on: April 06, 2008, 11:48:22 PM »
sir one voltage regulator per slot ba? kung ten outputs ko sa PSU. 10 din ang regulator?

electronics forum na to..  :lol:

Offline BAMF

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #14 on: April 07, 2008, 01:25:56 AM »
sir one voltage regulator per slot ba? kung ten outputs ko sa PSU. 10 din ang regulator?

electronics forum na to..  :lol:

The 7809 can handle 1A...teka 1.5A ata. at 20mA per pedal, 1A can power 50 pedals. Of course there are exceptions such as the Digitech Whammy and certain tube-based pedals. So the simple answer is, you need only one and then tap as many outputs as you need. Siguro naman wala kang pedalboard na 50 pedals ang laman ? :D  :-D
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Offline McKenty

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #15 on: March 06, 2011, 11:40:59 PM »
mga masters, newbie question here (at buhayin ko na din itong thread). i brought my generic adaptor sa technician sabi 7909 daw (instead of 7809) ang ilalagay kc parang sa center negative daw yun. don't know much on electronics, paging sir BAMF etc. pa help naman po! thank you...

Offline siore

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #16 on: March 07, 2011, 09:55:06 AM »
mga masters, newbie question here (at buhayin ko na din itong thread). i brought my generic adaptor sa technician sabi 7909 daw (instead of 7809) ang ilalagay kc parang sa center negative daw yun. don't know much on electronics, paging sir BAMF etc. pa help naman po! thank you...

7809 will do fine. :-) Just a matter of where you connect the legs of the 7809 (see BAMF's earlier post).
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Offline McKenty

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #17 on: March 07, 2011, 10:23:47 AM »
sir siore, thank you very much for the info! will bring again my adaptor to the technician. already bought 7809 from deeco.... :-)

Offline claymore69

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #18 on: August 03, 2015, 09:11:13 PM »
Mga sir buhayin ko lang tong topic na to haha medyo newbie lang kasi ako . kung 12Vdc at 1A gamit ko  ndi ko na ba lalagyan ng rectifier bridge tong nasa diagram ko ?

Offline Musikerochan

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #19 on: August 04, 2015, 09:18:23 AM »
di na. rectified na ang output mo eh (12V DC).

Offline claymore69

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #20 on: August 04, 2015, 09:58:57 AM »
di na. rectified na ang output mo eh (12V DC).
ung ibang diode na asa diagram kelangan pa rin ba un ? haha

Offline wireless_system

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #21 on: August 06, 2015, 12:03:00 PM »
ung ibang diode na asa diagram kelangan pa rin ba un ? haha

Di na required yung ibang diode pero mas maganda kung ilagay.
Kung regulated naman yung 12Vdc mo, pwedeng 7809 lang ilagay mo para less components talaga.
Pag unregulated naman kahit isang cap at isang regulator na lang ilagay.
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Offline claymore69

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Re: Converting Unregulated to Regulated Power Supplies.
« Reply #22 on: August 06, 2015, 08:58:14 PM »
Di na required yung ibang diode pero mas maganda kung ilagay.
Kung regulated naman yung 12Vdc mo, pwedeng 7809 lang ilagay mo para less components talaga.
Pag unregulated naman kahit isang cap at isang regulator na lang ilagay.
sa caps din ba nanggagaling ung mga volts na lumalabas sa output ?