A quick question on the LM2596

If you provide more info on what you're powering (voltage you need, current/power you need) I think you'll get a better answer.  The basic assembled DC-to-DC modules on eBay start at about $1 with free shipping from Asia.  That's what I call an insane price considering if you bought the individual components (LM2596 and related resistors, capacitors, etc.) it would be several times that price.

Thanks Stan,

Yes I have LM 2596's in house.  I plan to use one to supply output voltage of 5vdc to my breadboard.  I can learn a lot of basic LED circuitry on a breadboard.  Which I need badly.  What I'm looking for are suggestions for the most convenient input source, be it a xformer, wallwart, or battery. I think it can be AC/DC 6 to 14 volts. 

Thanks

Tommy   

If you have an assembled module, which one?  There are those that accept AC or DC as input, and those that accept only DC as input.

As I see it, the most convenient source is the one that you already have.  So if you need AC, that would probably be the AC accessory output of most train transoformers.  If you need DC, that would probably be the DC output of a surplus wall-wart.

Hi Stan

My units input is AC or DC 6 to 14 volts.  Adjustable pot and meter on the output.  My output current usage from the 2596 will be minimum since it will supply Power to my breadboard.  The BB will feature simple LED circuitry.

Thanks

Then for minimal clutter, and since your module accepts AC or DC, I'd use a 9V DC (or so) wall-wart.  Since your current requirements are minimal, no need for a bulky AC train transformer.

Thanks Stan

I appreciate your help.  I was also thinking along those lines. I'll look at our local cable and connections store tomorrow.

Thanks

Tommy

If there's a Goodwill store nearby, you might find a box of orphaned wall-warts priced 50 cents, $1, etc..