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RioRand LM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (1Pcs-LM2596)

by RioRand
4.0 out of 5 stars 166 customer reviews
| 49 answered questions
Price: $5.95 Free Shipping for Prime Members | Fast, FREE Shipping with Amazon Prime
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DC 3V to 40V
  • Input: DC 3V to 40V (input voltage must be higher than the output voltage to 1.5v above can not boost)
  • Output: DC 1.5V to 35V voltage continuously adjustable, high-efficiency maximum output current of 3A.
  • Features: All SANYO solid capacitors, the 36u thickening circuit boards, high-Q inductance with output value of high-power LED indicator
  • Dimensions: 45 (L) * 20 (W) * 14 (H) mm (with potentiometer)
3 new from $2.99
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$5.95 Free Shipping for Prime Members | Fast, FREE Shipping with Amazon Prime In Stock. Sold by NooElec and Fulfilled by Amazon. Gift-wrap available.

Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and .

If you're a seller, Fulfillment by Amazon can help you increase your sales. We invite you to learn more about Fulfillment by Amazon .

Frequently Bought Together

  • RioRand LM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (1Pcs-LM2596)
  • +
  • LOHAS 100W LED Chip Cool White Bulb High Power Energy Saving Lamp Chip
Total price: $16.44
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Technical Details

Color: DC 3V to 40V
  • Brand Name: RioRand
  • Model Number: RRLM25961.23-30V

Product Description

Color:DC 3V to 40V

Input: DC 3V to 40V (input voltage must be higher than the output voltage to 1.5v above can not boost) Output: DC 1.5V to 35V voltage continuously adjustable, high-efficiency maximum output current of 3A. Features: All SANYO solid capacitors, the 36u thickening circuit boards, high-Q inductance with output value of high-power LED indicator Dimensions: 45 (L) * 20 (W) * 14 (H) mm (with potentiometer)

Product Information

Color:DC 3V to 40V

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Customer Reviews

Top Customer Reviews

5.0 out of 5 starsExtremely Accurate
By JEFFERY MCGHAN on November 21, 2012
Color: DC 3V to 40V Verified Purchase
The details on the ad sucks .........This is a great little converter is stable to one hundredth of a volt ........On my FLUKE 87 . Even with a load the voltage did not fluctuate at all when I swept from 12.5v to 18v on the input for testing .The output voltage was set at 7.45v and remained at 7.45v . However I found that if the input voltage drops to close to the output voltage the output voltage will start dropping . Load will also effect the voltage variance with low input voltage . I hope that this helps you
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5.0 out of 5 starsUsing as Power Supply for Raspberry Pi
By Thomas Didymus on May 8, 2013
Color: DC 3V to 40V Verified Purchase
I bought this to efficiently run a Raspberry Pi from a 12VDC lead-acid battery. It not only runs the Pi, but a powered USB hub with some high-current USB peripherals as well. Everything runs great and very stable, even as the input voltage varies (this is due to solar charging). I was originally going to build one of these myself, but it's mighty hard to beat Amazon's price on a fully-assembled unit, especially when you consider shipping costs from most discrete component suppliers.
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5.0 out of 5 starsgood product, great service
By BobK on July 1, 2013
Color: DC 3V to 40V Verified Purchase
I bought one of these to use in a couple of projects. When it arrived I had some problems with it, and emailed the vender for help. Within a few hours I received an answer (from China) with a few suggestions and questions. I emailed back - and within a day I got a reply that they had shipped me a new unit! Excellent service I think! The second one works great. I like the product and I'll be ordering a few more of them. The only down side is that shipping from China takes a couple of weeks. Not usually an issue for me.

By the way, the problem I was having was probably my fault in the first place. The device arrives with the potentiometer set for near maximum output voltage. It also adjusts very slowly and takes many turns counter-clockwise to see any voltage changes at the output. The output voltage always appeared to be .5V less than the input and it didn't seem to me that the potentiometer had any effect. However, this is actually a feature and allows the output to be precisely adjusted. Just persevere and keep turning it CCL and you'll eventually see the output voltage drop.
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3.0 out of 5 starsWarning 35 volt input MAX, not 40V!!!!
By Jetguy on August 31, 2013
Color: DC 3V to 40V
The product is actually pretty good an loosely follows the suggested circuit for the regulator data sheet. The main problem is the use of a 35V cap on the input. With any capacitor, you never, ever exceed the rated voltage. They can and will fail dead short and blow up.
In fact, we normally never use anywhere near the max rated voltage stamped on a capacitor. So with it being 35V rated, MAX recommend input is roughly 30V making the output a safer 28.5 voltts since both caps are rated 35 volts and the input must be about 1.5 volts higher than the output. The best and easiest thing to do is just change the rating to match the actual components used.
Ideally they should have used 50 volt rated caps. Also note that per the suggested circuit in the data sheet, you should have a larger value 680uF VS the current 220uF.
[...]
Again, it's not a bad circuit and it works, just don't run it up to the max voltage rating. Hopefully they will change the rating but this review is for those who already bought or are looking and need that high of an input rating.
4 Comments 38 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsGreat little Buck.
By Albe on June 5, 2013
Color: DC 3V to 40V Verified Purchase
Hooked this little guy of to a nice power supply and a oscilloscope and gave it a work out. Once set to the desired output voltage, changing the input voltage or load had almost no effect on regulation. I've been using to drive parts-express's BT-1A Bluetooth module in my car and it's holding up quite well. Can take the Florida heat and the abuse of being in a car and still hasn't changed its output voltage from 5V. The price is excellent and I recommended this to all of my engineering friends.
3 Comments 22 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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5.0 out of 5 starsused for my raspberry pi worked great
By Sean on May 20, 2013
Color: DC 3V to 40V Verified Purchase
Powered pi and attached arduino without a problem from a lipo 7v battery. Measured around .5 amps at 7 v continuous
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4.0 out of 5 starsJust works
By Thomas Simmons on May 10, 2013
Color: DC 3V to 40V Verified Purchase
You can't even buy the components to build this as cheap as this assembled power buck. And if you are making your own trailcam or setting a DSLR up for Astronomy, then this puppy will be one of the components you need. Use a power meter to adjust the voltage, then check it with the camera up and running.

Basic stuff here, folks. But verify whatever you are hooking up to this doesn't exceed the limiters amp rating.
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5.0 out of 5 starsNifty gadget
By G. Boulton on November 19, 2012
Color: DC 3V to 40V Verified Purchase
Does just what it's designed to do...steps down DC voltage. Input and Output connections are clearly labeled, output voltage is easily adjustable. Quite a handy little hobby gadget.

I use it outdoors in below freezing temps, doesn't seem to bother it at all.
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Most Recent Customer Reviews

5.0 out of 5 starsFive Stars

Perfect, works as advertized

Published 24 days ago by Dwood2469
5.0 out of 5 starsWorks great for dropping 24v to 12v

Bought this to drop the voltage from 24v to 12v to power an LED light from a 24v battery. Works great and a real value for the price.

Published 1 month ago by GeooeG
1.0 out of 5 starsUnit has no output.

Unit has no output.

Published 1 month ago by jghall
5.0 out of 5 starsGreat!

Great little buck converter for small portable projects.

Published 2 months ago by Christos Marathonitis
5.0 out of 5 starsPower it.

I do like this and will go do some power projects soon.

Published 2 months ago by Albert Carpenter
5.0 out of 5 starsDoes what it needs to do.

Easy to use. Easy to adjust. Easy to wire. Easy to mount.

Published 3 months ago by Amazon Customer
5.0 out of 5 starsFive Stars

Works exactly as described

Published 3 months ago by zanek
5.0 out of 5 starsThey work as expected.

These are fantastic if you have the need for an efficient step down. I've used these on quite a few projects. They provide a very consistant voltage. Read more

Published 5 months ago by Skyler76
1.0 out of 5 starsNot as advertised: RioRand LM2596 DC-DC Buck Converter

Description specifies "All SANYO solid capacitors". Not so: plain vanilla electrolytic caps instead ("Chenbin Vent").

Published 5 months ago by Shinrichi
5.0 out of 5 starsawesome little power converter - i have a few of ...

awesome little power converter - i have a few of them and they've been running great for months. very stable - even if the load changes, it auto-adjusts to maintain the desired... Read more

Published 7 months ago by Symone

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