ATNSINC 4Pack LM2596 DC-DC Buck Converter, Adjustable Step Down Voltage Regulator 3-40V to 1.5-35V High Efficiency Power Supply Volt Reducer Transformer Module

Pretty much dummy-proof. Does what it says; easy to adjust the voltage.

Using this to take 2x18650 battery (8v+) down to 5V. Very good accuracy. Working just like it should.

Cheap solution to reoccuring problem. I used an old wall charger to convert a solar LED light over to electric so I can use it in an area that doesn't get much sunlight. The photo doesn't show the brightness very well. Since the output voltage is adjustable, you can adjust the brightness of the lights. Now our shaded patio can have lots of fun lights!

Hooked up first unit to a sonicpower 12v gel battery and a led light I got from harbor freight.. worked fine for about 5 hours or so. I disconnected it and tried to connect again and the unit no longer worked. Even the onboard led wouldn't light up. Wtf factor at play here. Overheating is not possible seeing as how I ran it at nor more than 1 amp. The only other issue I can think of is having accidentally reversed the polarity. Will test the other units and report back. The second unit seems to be working ok. I'm taking care not to reverse polarity.

I am new to using buck converters but these were pretty easy and are smaller than the ones with the display.

It is a good product, I recommend it

I've had 50% not be able to source more than 60ma of current. They don't get hot, just shut down. Kinda a bummer because I didn't find the issue until I mounted them in an enclosure. I'd test them first in the future on the bench. The other 2 seem fine.

This is an excellent DC power source for a multitude of hobbies or projects. It is especially useful to power up miniature or surface LED's by dialing down the output voltage to 3V thus eliminating the need to wire up resistors. Just make sure the DC input voltage is at least 1.5V greater than the output voltage.

Good little controllers. Using them for some DC PC fans

Very good quality

منتج ممتاز جداً والدائرة فكرتها عملية ومفيدة وتعمل بكفاءة

Ok

It is good item and working normal same as described.