Title: Negative voltage W/O center tap
Hello everybody!
I know that this has been asked hundreds of times so I would like to apologize for posting this question again.
I am post this because I can't find the answers to my questions.
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I will be making a bench PS with this design: http://www.quan-diy.com/projects/benchps/benchps.htm
I will be using a toroid transformer with two bifilar (0-18V 3A)windings and another two bifilar (0-15V 0.4A) windings on the secondary.
The two 0-18V windings will be paralleled an used for the main circuit.
The two 0-15V windings will be used to power a fan, the volt& digital display and the Vcc- of the opamp.
How do I generate a negative voltage from the 0-15V windings?
I am thinking about separating the two windings. One for the fan and displays and the other will be hooked up in reverse for the opamp.
Or I could make a rail splitter but I don't know how to make one.
Say I already have generated the negative voltage for the opamp, how do I power the opamp with this since it is already getting it's Vcc+ from an isolated winding.
I would like to use only this traffo is possible to save space. Anyone willing to lend a hand?
Hello everybody!
I know that this has been asked hundreds of times so I would like to apologize for posting this question again.
I am post this because I can't find the answers to my questions.
*************************
I will be making a bench PS with this design: http://www.quan-diy.com/projects/benchps/benchps.htm
I will be using a toroid transformer with two bifilar (0-18V 3A)windings and another two bifilar (0-15V 0.4A) windings on the secondary.
The two 0-18V windings will be paralleled an used for the main circuit.
The two 0-15V windings will be used to power a fan, the volt& digital display and the Vcc- of the opamp.
How do I generate a negative voltage from the 0-15V windings?
I am thinking about separating the two windings. One for the fan and displays and the other will be hooked up in reverse for the opamp.
Or I could make a rail splitter but I don't know how to make one.
Say I already have generated the negative voltage for the opamp, how do I power the opamp with this since it is already getting it's Vcc+ from an isolated winding.
I would like to use only this traffo is possible to save space. Anyone willing to lend a hand?