Be careful of those third-party sellers on a reputable site. You can get burned. I bought something from a third-party seller on Amazon.

The item was $5. Amazon reported the total price was $8 (I'm rounding for illustrative purposes) When the $8 item arrived, THERE WAS A $50 SHIPPING CHARGE!!!

I fought Amazon, because I bought it through them. THEY got it from the other seller. I won.

You may not be so lucky.

 

...Basic Bench Top Power Supplies
One of the few items you can DIY economically.

Any "absolute bests" on Youtube- or elesewhere? I do have the ability to buy many components here 3 miles away...I like A.H.W.'s suggestion above as well (just a free time thing overall here).... This Yescom enigmatic unit has become interesting..Apparently it comes by many names if you look deep enough on the YT. : )

 

Hi,

You might build a high current power supply yourself but i think you have to be a real diehard hobbyist to want to do that

I had looked into doing this before i got a couple of my power supplies and i saw that the price of the parts gets too close to the price of a new ready made unit, so i went with the ready made unit and then got a second one used some time later at a lower cost.

At one time i was planning on building one that needed a very heavy current inductor, and the inductor alone was 1/3 of the price of a new unit ready made so i trash canned the whole idea.

I think the lower current models however are within the reach of most hobbyists, even the ones just getting into electronics as a hobby. The LM317 and similar based power supplies are really easy to build. The higher current versions of the LM317 allow going up to much more current too, at the expense of some heat, but it works out well for someone who just needs a supply for testing something else. The next step up is a small switching supply which isnt too much more difficult to build than the LM317 based types.

 

If you want a High current low cost power supple you could convert a PSU. Warning there are Way to many PSU conversions that have issues (such as using a cheap non rated Chinese binding posts) Be safe for every day low current use get a 1 or 2 amp fuse, so that if there is a short the fuse will blow not the circuit board or the PSU.
Best of luck.
A.H.W.