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MachinistBlog.com

Plans, projects and how-to's for home machinists

How to Build a High Current Power Supply

The parts that are needed, except you might need a capacitor.Darren over at MadModder.com wrote a nice tutorial that will teach you how to build a high current variable power supply suitable for a CNC conversion or a home-made power feed. He and others on the forum will probably be able to answer any questions you might have.

I got excited when I saw his thread because I still need to build the power supply for my mini-mill CNC conversion.  I have the parts and a rusty education in electronics, but until I saw Darren’s thread I didn’t know of an easy, reliable and safe way of mounting them.  Unfortunately I’m still not sure how I’m going to do it.

Darren mounted everything except for the transformer on the lugged board at the front of the picture and I’ve had trouble finding one.  I’ve spent well over an hour so far going through parts catalogs and searching online for terminal boards, terminal strips, tag boards, lug type phenolic and some other search terms without success.  At this point I am thinking about going back to my original idea, which is to hand-draw a printed circuit board with a magic marker and then etch it.

If you know where I can get one of Darren’s boards or if you know of another good, easy way to mount my components then please leave me a comment.  You don’t have to register.  Just leave your comment and your email address.  If it is not spam I will approve it and the blog will automatically send you a password, which you can change if you want.

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