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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
SoundLab Power Supply MOD
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nineTENdo



Joined: May 12, 2006
Posts: 3
Location: San Anto
PostPosted: Fri May 12, 2006 1:57 am    Post subject: SoundLab Power Supply MOD Reply with quote  Mark this post and the followings unread
Hello Everyone,
I just wanted to know if its possible to use a 15-v power supply instead of a gay 9-v battery. I saw a Thomas Henry Article featuring a Dual
15-v power supply and want to incorprate that so i can make the Step Sequencer and the Sound lab off one plug and as one unit.

Thanks in advance,
EL
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nineTENdo



Joined: May 12, 2006
Posts: 3
Location: San Anto
PostPosted: Sun May 14, 2006 2:22 am    Post subject: Reply with quote  Mark this post and the followings unread
Well i just found that the Soundlab only runs on 9v which totaly sucks for my project. How can you all stand just using a 9v battery. HOw long does it last?. Does anyone have any bipolar 9v Circuit casue the sequencer can run off 9v too?

Thanks,
EL
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dnny



Joined: Mar 12, 2005
Posts: 519
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PostPosted: Sun May 14, 2006 3:00 am    Post subject: Reply with quote  Mark this post and the followings unread
nineTENdo wrote:
Well i just found that the Soundlab only runs on 9v


well SoundLab runs also on +-12V

take a look on Regulated Plus and Minus 12 Volt Power Supply

if you want to go for the +-15V PSU. you can regulate some +-9V for your SoundLab whit 7809 (voltage regulator)

and topics that might interest you:
external power source
PSU instead of batteries?

dnny
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fluxmonkey



Joined: Jun 24, 2005
Posts: 708
Location: cleve
PostPosted: Tue May 16, 2006 4:21 am    Post subject: Reply with quote  Mark this post and the followings unread
nineTENdo wrote:
Well i just found that the Soundlab only runs on 9v which totaly sucks for my project. How can you all stand just using a 9v battery. HOw long does it last?. Does anyone have any bipolar 9v Circuit casue the sequencer can run off 9v too?

Thanks,
EL


the 442/444 op amps have very low power consumption... i've had the original batteries in mine for 2 years (intermittent use) w/out having to replace 'em. batteries also mean no issues w/ 60hz hum, so it's not all bad. figuring out a +/-9v powersupply should be trivial, tho--adapt any 12 or 15 v schematic, just replace the transformer and regulator chips w/ ones of smaller values.

b
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spoorkoning



Joined: May 23, 2006
Posts: 3
Location: US
PostPosted: Fri May 26, 2006 1:28 pm    Post subject: SoundLab Power supply Reply with quote  Mark this post and the followings unread
dnny wrote:
nineTENdo wrote:
Well i just found that the Soundlab only runs on 9v


well SoundLab runs also on +-12V

take a look on Regulated Plus and Minus 12 Volt Power Supply

dnny


Could you also use 2 12V powersupplies (like for laptops) wired in succession?
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Basthian



Joined: Jun 03, 2006
Posts: 11
Location: Sweden
PostPosted: Mon Jun 05, 2006 11:16 am    Post subject: Reply with quote  Mark this post and the followings unread
dnny wrote:
nineTENdo wrote:
Well i just found that the Soundlab only runs on 9v


well SoundLab runs also on +-12V

take a look on Regulated Plus and Minus 12 Volt Power Supply

if you want to go for the +-15V PSU. you can regulate some +-9V for your SoundLab whit 7809 (voltage regulator)

and topics that might interest you:
external power source
PSU instead of batteries?

dnny


If I build that circuit on the MFOS page what will I need to connect it to the wall? English isn't my first laguage. What is a 25 VAC center tapped Transformer?
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Pehr



Joined: Aug 14, 2005
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PostPosted: Mon Jun 05, 2006 11:51 am    Post subject: Reply with quote  Mark this post and the followings unread
It's a 2x12V AC transformer, I used one for that PSU... Cool
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dnny



Joined: Mar 12, 2005
Posts: 519
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PostPosted: Mon Jun 05, 2006 12:12 pm    Post subject: Reply with quote  Mark this post and the followings unread
Basthian wrote:
If I build that circuit on the MFOS page what will I need to connect it to the wall? English isn't my first laguage. What is a 25 VAC center tapped Transformer?


you just need to connect the 25 VAC Transformer (Transformator 25 V -Primärspänning: 230 V~) so that the "Primärspänning" goes to wall and the 25V end goes to diodes. the center tap is the extra "tap" on the secondary side of the transformer and must be connected to ground.
(ask for center tapped Transformer from your local supplier and they will know what you want)

Posted Image, might have been reduced in size. Click Image to view fullscreen.

and BTW welcome to electro-music forum
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