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aghielan
Joined: 01 Jun 2006
Posts: 38
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 28 Jan 2008 16:02 power supply lab circuit ds |
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| Anyone do have positive and negative power supply circuit for 0-30v with corse, fine and also current adjustment? Please help me on this. Thanks in advance.
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28 Jan 2008 16:02 Ads |
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Fawad Elahi
Joined: 19 Mar 2007
Posts: 64
Helped: 3
Location: Pakistan
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28 Jan 2008 18:52 0-30v power supply using lm117 |
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for a power supply you only need
1. a rectifier
2. then a current limiting resistor
3. a capacitor
4. an inductor
5. a load resistor
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rx5
Joined: 26 Oct 2004
Posts: 132
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28 Jan 2008 23:48 Power Supply Circuit |
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| try **googling** it , my friend... there are LOTS out there...
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rowokii
Joined: 31 May 2007
Posts: 74
Helped: 10
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29 Jan 2008 3:25 Power Supply Circuit |
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What you are describing is a lab power supply. Here's one that does 0-30v with current limit:
http://www.electronics-lab.com/projects/power/003/index.html
However, you can make a much simpler one if you are willing to live with 1.25-13v or so. Try searching for LM317 (positive) and LM337 (negative) linear regulator and look at the datasheet for example circuits, such as here: http://www.national.com/ds/LM/LM117.pdf
It shows you things like how to make the circuit work from 0-30V, add current limits and so on... but linear regulators are going to waste a lot of power with such a wide voltage range. A good power supply design that work over that wide a range is complicated.... I strongly recommend you to see if you can live with something a bit more modest to start off.
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aghielan
Joined: 01 Jun 2006
Posts: 38
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29 Jan 2008 3:54 Re: Power Supply Circuit |
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| hi all, thanks for the info.
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