Hi everyone,
This will be my first post on EEVBlog but hope to make my stay here a long and enjoyable one. I am certainly no stranger to DIY projects and can follow and build a schematic quite well but circuit design is an area that I'm not very capable in. Hopefully all that will start to change soon enough. I figured what better way to begin than to attempt to construct a Benchtop Power Supply.
After a lot of searching I have decided to give an LM723 implementation a go and aim for a ~0 - 30VDC @ 0-5A output. I have no requirements at the moment for a negative rail so dual tracking is not a concern for me. Not really concerned about size or weight either.
On to the design, I have come across several implementation around the internet but given my lack of knowledge and experience I am having a hard time determining which of the schematics are better in terms of design. I have listed 2 of the circuits below:
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http://www.sentex.ca/~mec1995/circ/ps3010/ps3010a.html - I have commonly seen this or variations of this circuit as the 'go-to' LM723 circuit when used a voltage regulator.
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http://www.thebackshed.com/forum/forum_posts.asp?TID=2249&PN=4&TPN=1 - Another one similar to the above
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https://www.eevblog.com/forum/beginners/first-power-supply-build-woes/msg280551/#msg280551 - This is one I recently came across on the forums posted by member "Paul Price" which makes for a much more complex design with the added circuitry to handle the fan and its control. From what I can tell, the 723 implementation is slightly different than the 1st circuit i posted. For example, the voltage & current adjustment pots being elsewhere in the schematic.
To try to remain as concise as possible, I was hoping someone could possibly shed some light on these circuits or perhaps even suggest better design features, additions, changes, etc. That way, I want to have a proper sit down with a particular design and work my way through understanding how it all works. If someone can point me in the right direction of how I should be going about this that would be much appreciated.
Regards,
Andrew