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Old 21st April 2006, 11:13 AM   #1
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Question Datasheet psu, 0.1v to 50v @1a...

HERE :
(page 12, Figure 14)
http://www.intersil.com/data/fn/fn817.pdf

...My question is, what would come between this regulator circuit, and the power transformer.......bridge and smoothing caps??

...And what transformer say you?

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Old 21st April 2006, 12:01 PM   #2
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You'll need 35-40 VAC, 70-100 VA, 2200-4700 uF in smoothing.

I friend of mine built this PS long time ago and it worked pretty well.
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Old 22nd April 2006, 02:36 AM   #3
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Thanks peranders.

...btw, how could this be turned into a dual polarity supply?
...or is that a drasticly different circuit altogether ?

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Old 22nd April 2006, 06:03 AM   #4
Electrons are yellow and more is better!
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You can built two identical PS and then connect them in series. This will give you a dual suuply.
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Old 22nd April 2006, 08:58 AM   #5
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I'm sorry, I meant a bipolar psu....."plus, minus ( and ground, 0v)" volts output.

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Old 22nd April 2006, 09:14 PM   #6
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I ment that too.
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Old 26th April 2006, 01:32 AM   #7
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OK, so using a center tapped tranny....
positive is one psu,
negative is another,
....and 0v (ground) is shared with both.

Correct?? ( )

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