How do you design/build a +15v/-15v dc supply
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How do you design/build a +15v/-15v dc supply

 
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Peter F



Joined: 10 Dec 2005
Posts: 4
Posted: Thu Dec 15, 2005 2:06 pm    Post subject: How do you design/build a +15v/-15v dc supply Reply with quote
I want to design a circuit that will give me a +15v/-15v dc output from a transformer.
I do not understand the concept of + and - voltage rails. I do need this to repair a preamp.
Could anyone please tell me how to do it. I would be most grateful. Question

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neon



Joined: 25 Feb 2006
Posts: 594
Posted: Sat Feb 25, 2006 6:51 pm    Post subject: Reply with quote
get a bridge rectifier a power transformer with a center tap. the center tap now is your gnd.and the loads +/- buy a 20v ac and now put some regulators of the lm78xx series and you gat it don't forget caps in and out . need more help re submit.
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mike66



Joined: 03 May 2006
Posts: 3
Posted: Wed May 03, 2006 1:39 pm    Post subject: Reply with quote
You can refer to the schematics on how to design a positive and a negative DC power supply from the following site.

http://www.electronics-project-design.com/DualPowerSupply.html

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