LM2596 Buck Step-down Power Converter Module 4.0-40V to 1.25-37V LED Voltmeter
1. Adjustable output voltage range of 1.25V ~ 37V continuously adjustable (1.5V input voltage must be higher than the output voltage).
2. Maximum output current up to 3A, normal and stable operating current of 2A
With a voltage meter display, the use of advanced microprocessors, range 0 ~ 40V. (Note: To ensure accuracy voltmeter, please ensure that the input voltage is 4V above)
3. With power indicator light
4. Tap the right button to switch the input or output voltage measurements and has a light display which is being measured voltages, and save the settings, even then boot off
5. Voltmeter can be turned off when not needed can easily touch the left button
6. With terminals, no soldering iron can also be easy to use, and retention wire connection points
7. Using the internal oscillator frequency 150KHz, belongs to the second generation of switching voltage regulator, power consumption, high efficiency.
8. With overheat protection and short circuit protection
Patrick Dieringer –
Works flawlessly, and the screen is useful to have
These work well and don’t put off very much heat. The screen is a VERY nice feature to have, although I would recommend having a voltage tester as the display can be slightly off from the actual output. The adjustment potentiometer is pretty smooth, but it takes quite a lot of turns to adjust significantly.
Paul Donovan –
Counterclockwise that vscrew!
I hooked them up and didn’t see any voltage change on the output side and after reading another review ya gotta turn that screw back a number of times before it starts to lower the voltage. They work great, just go counterclockwise a lot before you see change.
Sk1lZz –
Don’t expect alot
This little guy does pretty much what it’s supposed to. It’s not real exciting. It can handle voltage higher than it’s rated and can reduce voltage down an impressive amount. It’s compact and well made. Voltage hold is steady. Overall better than most out there but don’t expect a lot more than that.The adjustment method can be a bit frustrating and it won’t drop 48 volts to 12 or lower, you will get around a 20 volt drop and if you go lower it automatically resets to where you started. The connections are pretty small and the display will fail if you make any mistakes. Again it’s probably one of the best for what it is.
6 people found this helpful
rockman –
Great for regulating voltage on small projects
I purchased this to knock down the voltage from a 4S Lipo battery in a handheld TV antenna signal strength meter I put together. I’ve seen some reviews that these don’t work, but let me tell you, you have to back off on the pot (CCW) 12-15 turns before you’ll see anything happen. Then it adjusts right to where you want it. I needed to knock down the 15V from the battery to around 12.2V… I double checked it with my Fluke 87, and it showed 12.22V. I’m happy with it.
Jim –
Nice little buck converter
This buck converter works as expected with a nice voltage meter as a bonus.The instruction is not details enough causing some people to get confused thinking it does not work. As shipped, the output voltage is set very high so it looks like it doesn’t regulate at all since as you increase the input, the output would go up accordingly. You must adjust the output voltage by turning the blue set screw at the top. Keep turning the screw counterclockwise until the output voltage is lowered to your desired level.The other confusing part is the voltage meter, as shipped it was very accurate for me, but you could calibrate it manually by long pressing the right button until the display is flashing, then use the right button to add and the left button to subtract, then long press the right button again to save the calibration. The voltage meter and the two buttons do not effect/control the actual out put voltage at all; some people seem to think that they do control the output voltage.
73 people found this helpful
The meyer family –
They work as described, they strictly work with DC only, please dont think this is anything else
These are fantastic, I only wish they came with some sort of cheap housing, but most people don’t use a shield or housing. They work good, but you need to understand the limits, these are good if you intended output( the device you want to power) is not over 2A of peak or current load, these are good for like, LED’s maybe a couple of 12-24 pc fans, but you should not use this for high amperage conditions, this board is not build for it, if you need high power your better off getting a specific PSU like a small meanwell power supply which are usually built for higher power draw. Overall these are fantastic as most don’t have a display which this does and you can switch it from input voltage to output voltage so you can dial the output voltage without a multimeter (however if you do have a multimeter which if your doing anything involving a buck converter you should, you can also correct the display voltage on the screen if for say its off by 1 volt or 0.1 volt compared to your multimeter, you can edit the display to correct for the error in voltage and then make it display the true voltage, you should do this the second you get it, but you don’t have to as mine was only off by 0.1 volts which is good enough for any application I would need.
18 people found this helpful
woodsonservices –
2 of the 4 don’t work
Only 2 out of the 4 workedHopefully the 2 work for awhile
Gary G. –
Gave 5.1V +- 0.1V with input from 8.1 to 14.5V
This took some fiddling to calibrate both the on-board voltmeter and the device output. But, once done, the stability of the output was impressive.This item is what the hiletgo site calls “LM2596 Step Down Power Module Adjustable With Voltage Meter Display FREE Studs”.The left button turns the meter display on/off. The right button cycles between output voltage and some other number which I don’t understand – so that’s confusing.To calibrate the meter, make sure it is reading the output voltage by comparing with your own voltmeter – it should at least be close. To start with the output voltage will be unregulated. Then long press the right button until the display flashes, after which you can increase with right button and decrease with left button. Long press right button again to save calibration.Now you can use the on-board meter to set output regulation (though I would still do a final check with your own meter). Turn the little screw on the blue box component counter-clockwise to lower the output voltage. This screw can be turned multiple turns. I don’t know if it has “lash” but I would fiddle it back and forth to be sure you have a good setting.My only real complaint is the terminal screws were quite hard to turn. You will need a good screwdriver of an appropriate size and some finger strength. The screw-heads seem more of a crossed flat than a real Philips. My son was starting to chew up one of the heads and I had to take over, but I found they really did take a crazy amount of torque.
29 people found this helpful
Lawrence Gilstrap –
They work
Work as intended from what I’ve done so farMake sure you test the power out before wiring anything up of course.
One person found this helpful
David –
How to Actually set it up…..
The buttons are for volt meter DISPLAY purposes only!The right button short click will show input OR output voltages, the LED moves side to side letting you know which you are viewing. Seems to be right on the dot with my volt meter.HOW TO ADJUST OUTPUT CORRECTLY:Hook up your source power to input. Output side, put your volt meter for DC voltage.The little blue box at the top with the tiny brass screw, you are going to move that counter clock wise to decrease the output amount vs input amount. DEFAULT THEY ARE SET TO BASICALLY LIMIT NOTHING so adjust this before attaching anything other than a volt meter on the output side. Move the screw to adjust to your target output voltage, say 5.0v for example. Now you will LONG press the right button and the voltage display will be flashing a voltage this is the calibration voltage for the output reading volt meter. Adjust this with the left and right button on quick presses to match what your volt meter is reading. Once you have this done, LONG press the right button to store it. This will now have the OUTPUT voltage reading on the screw be correct moving forward. The buttons do not increase or decrease output, just calibrate the voltage meter display. Now when you adjust the screw while displaying output voltage, the screen will be correct on the output amount.
7 people found this helpful