DIY PSM Component...help

[LoneDeRanger]

Here are links to what I have found, please help me narrow down a power control module for a variable voltage diy unit.

I am wanting to make a couple of boxes to tinker with.


LM2596 Step Down Adjustable DC DC Power Supply Module New | eBay

DC DC Buck Converter Step Down Module LM2596 Power Supply Output 1 25V 37V | eBay

1pcs to 263 LM2596S 3 3 TO263 LM2596 NSC Simple Switcher Power Converter | eBay

2X LM2596S Adj LM2596 Switcher Power Converter Adjust 3A Stepdown Voltage to 263 | eBay

1 Pcs LM2596 Power Step Down Module DC 4 0 40 to 1 3 37V LED Voltmeter Ea | eBay

DC Adjustable Buck Step Down Converter LM2596 Voltage Regulator with Voltmeter | eBay

DC to DC Buck Step Down Converter Module LM2596 Voltage Regulator Voltmeter Red | eBay

DC Adjustable Buck Step Down Converter LM2596 Voltage Regulator with Voltmeter I | eBay

Adjustable LM2596 Voltage Regulator DC Buck Converter Digital Blue LED Voltmete | eBay

DC to DC Step Down Converter Module LM2596 Voltage Regulator Voltmeter 4V 40V | eBay

5pcs LM2596 LM2596S Adj 150 kHz 3 A Step Down Voltage Regulator | eBay

5 Pcs LM2596 DC DC Converter Step Down Adjustable Power Supply Module | eBay

Lot 5pcs LM2596 LM2596S Adj Power Module DC DC Buck Converter Step Down Module | eBay

http://www.ebay.com/itm/ER99-New-5PCS-LM2596-Power-Step-down-Module-DC-4-0-40-to-1-3-37V-LED-Voltmeter-/110993186145?pt=LH_DefaultDomain_0&hash=item19d7b59d61

LED Voltage and Current Display LM2596 DC DC Step Down CC CV Adjust Power Supply | eBay




the last one looked interesting so I included it, not what im looking for I believe...

 

[Rader2146]

You can get rid of the ones like below that are just the regulator chip. It isnt worth trying to piece together a board when they come premade for a buck and change.

1pcs to 263 LM2596S 3 3 TO263 LM2596 NSC Simple Switcher Power Converter | eBay



Next ask if you want a voltmeter built in or not. That will eliminate a few more options.

Finally the question is size. If size matters...this is the smallest layout, and at a fine price.

DC DC Buck Converter Step Down Module LM2596 Power Supply Output 1 25V 37V | eBay

All of the premade modules that are based around the LM2596 will preform the same (for our uses). Performance wise there isnt really a winner, so it comes down to the questions above.

 

[LoneDeRanger]

Thank you for the info,