# MB6582 single power supply

**URL:** <https://forum.midibox.org/t/mb6582-single-power-supply/18997>\
**Category:** MIDIbox SID\
**Tags:** power-supply, mb6582\
**Created:** [April 10, 2015, 7:30am UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997 "2015-04-10T07:30:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Walter\_76](https://forum.midibox.org/letter_avatar_proxy/v4/letter/w/bbe5ce/32.png) [@Walter\_76](https://forum.midibox.org/u/Walter_76)\
**Post date:** [April 10, 2015, 7:30am UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/1 "2015-04-10T07:30:14Z")

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Hello all,

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I am building my MB6582 and I would like to use a single regulated 12VDC wall adapter.

I already read different posts related to the MB6582 power supply options, but I am still in doubt…

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Question: can I directly use the 12VDC rail for the SIDs (6582) and a switching regulator to derive the +5V rail?

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I mean: any problem in terms of noise in referring both the rails to the same GND instead of superimposing the 9V to the 5V one?

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Thank you!

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Walter

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**Author:** ![nILS](https://forum.midibox.org/user_avatar/forum.midibox.org/nils/32/19_2.png) [@nILS](https://forum.midibox.org/u/nILS)\
**Post date:** [April 10, 2015, 9:16am UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/2 "2015-04-10T09:16:00Z")

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Hiya!

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> I mean: any problem in terms of noise in referring both the rails to the same GND instead of superimposing the 9V to the 5V one?

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No. Your main noise issues will probably come from the switching regulator which tend to be somewhat noisy (audible hiss and clicks).&nbsp;

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Cheerio

&nbsp;

nILS

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**Author:** ![Shuriken](https://forum.midibox.org/user_avatar/forum.midibox.org/shuriken/32/149_2.png) [@Shuriken](https://forum.midibox.org/u/Shuriken)\
**Post date:** [April 10, 2015, 3:12pm UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/3 "2015-04-10T15:12:11Z")

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Walter, a couple of people already tried a switching regulator with good result. If you do a little search on the forum you should be able to find parts from Texas Instruments, Traco and Recom.  
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Offtopic:&nbsp;

```
nILS, long time no see here on the forums. Welcome back!

```

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**Author:** ![jojjelito](https://forum.midibox.org/user_avatar/forum.midibox.org/jojjelito/32/116_2.png) [@jojjelito](https://forum.midibox.org/u/jojjelito)\
**Post date:** [April 10, 2015, 5:00pm UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/4 "2015-04-10T17:00:23Z")

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I think that what nILS may have referred to is one of the older, standard switching regulators. The new ones that are drop ins for 78/79xx stuff tend to work in the 100s of kHz up to a MHz or so. Those aren’t noisy in any bad way. Texas, Traco and Recom make fine parts.

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**Author:** ![latigid\_on](https://forum.midibox.org/user_avatar/forum.midibox.org/latigid_on/32/107_2.png) [@latigid\_on](https://forum.midibox.org/u/latigid_on)\
**Post date:** [April 10, 2015, 5:32pm UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/5 "2015-04-10T17:32:44Z")

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Switching Vreg in my MB-6582 here, no audible noise. I won’t dig up the part number because I think it’s obsolete now. You have to wire in some voodoo jumpers but it’s not too hard. Also consider keeping the linear Vreg for the SIDs.

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**Author:** ![dreamer](https://forum.midibox.org/user_avatar/forum.midibox.org/dreamer/32/43_2.png) [@dreamer](https://forum.midibox.org/u/dreamer)\
**Post date:** [December 13, 2015, 7:56pm UTC](https://forum.midibox.org/t/mb6582-single-power-supply/18997/6 "2015-12-13T19:56:18Z")

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i’m intrested in powering my mb6582 this way. Please show how you do youre voodoo jumpers?