Looking for a 12-24v DC to 5vDC converter

[drock1985]

Hi,

I was wondering if anyone has ordered any step down regulators/converters from Ali that they trust? I am looking for one to power an Arduino/Mysensors build with 2 relays from a 16V DV 10VA source (door chime). I found one on Amazon.com, but they don't ship to Canada so I was thinking Ali and save some money anyways.

http://www.amazon.com/gp/product/B00BWLP88A?gwSec=1&redirect=true&ref_=s9_simh_gw_p23_d0_i1

[Sparkman]

@drock1985 I've bought and used these from eBay: http://www.ebay.com/itm/251493157362.

Cheers
Al

[AWI]

@drock1985 I use these. Simple & cheap
http://nl.aliexpress.com/item/15924-Free-shipping-DC-DC-Step-Down-Converter-Module-LM2596-DC-4-0-40-to-1/32354635261.html?isOrigTitle=true

[drock1985]

@AWI Hi AWI,

I've never used one of these before. I see the input voltage is 4-40V, but how do you adjust the output voltage?

If it's easy to adjust, i'll be getting a pack of 10 for sure. Thanks.

[LastSamurai]

The blue thingy on there is a potentiometer. That one changes the output voltage. Easy to change if you have something to measure the voltage.
PS Just do it BEFORE you add sensitive other components

[GertSanders]

I use these:

http://www.aliexpress.com/item/Standard-Power-Supply-Module-Adjustable-Step-down-3A-DC-DC-Converter-1pc-New-SG053-SZ/32321296375.html?spm=2114.01020208.3.2.d0AiJe&ws_ab_test=201556_2,201527_3_71_72_73_74_75,201560_1

Very small and sensitive potentiometer, but once adjusted they are stable. Smaller then the other model shown above, handles 1.8A continous and peaks up to 3A. Works at a higher frequency (1MHz) then the older design.

[NotYetRated]

@AWI said:

@drock1985 I use these. Simple & cheap
http://nl.aliexpress.com/item/15924-Free-shipping-DC-DC-Step-Down-Converter-Module-LM2596-DC-4-0-40-to-1/32354635261.html?isOrigTitle=true

A second for these. I purchased from ebay about a year ago, more expensive but same unit. Working in 4 cameras.

[gbfromhb]

This post is deleted!

[TRS-80]

@GertSanders said in Looking for a 12-24v DC to 5vDC converter:

I use these:
http://www.aliexpress.com/item/Standard-Power-Supply-Module-Adjustable-Step-down-3A-DC-DC-Converter-1pc-New-SG053-SZ/32321296375.html?spm=2114.01020208.3.2.d0AiJe&ws_ab_test=201556_2,201527_3_71_72_73_74_75,201560_1

I came across this topic today while looking for same. Of course by now this link is dead. I also tried picking part name, number, etc. out of the link with no success.

LM2596 based modules certainly seem well available and inexpensive, however I am very interested in a module that is smaller than that.

[monte]

@TRS-80 look for modules based on MP1584. 4.5V-28V input, up to 3A.

[TRS-80]

@monte said in Looking for a 12-24v DC to 5vDC converter:

MP1584

Ah yes! Those look perfect! Thanks, Monte!

Are those exact same as what was linked (name change perhaps)? Or different modules altogether, but meeting same requirements? I'm even more curious now about these mystery modules Gert had posted about!

[monte]

@TRS-80 I have no idea what exactly he posted then, but description matches I've read a review of this modules with some tests, and it was looking promising. But don't expect 3A from those exact small modules, too small inductor for such current.

[TRS-80]

@monte said in Looking for a 12-24v DC to 5vDC converter:

don't expect 3A from those exact small modules

No, I don't need it. Only a little bit (far less than 1A) for the uC + radio.

In this case I am just looking to power the uC off the same power supply as LEDs which have already reduced the mains down to 24VDC. I just thought it would be silly to have yet another power supply for the uC (coming from mains I mean), in addition to the one that's already there for the LEDs. So I plan to "piggy back" off that one, getting the 24VDC down finally to the 5VDC or whatever is needed for the uC + radio.

But it is very nice to have such a wide range of inputs (and adjustable output!) available, for as yet unknown future projects / needs. Especially when finding nice and inexpensive module like this, and order some 10s of them from China and just keep them on hand!