Dorhea LM2596 DC-DC Buck Converter Step-Down Regulator 4.0-40V To 1.25-37V DC 36V To 24V To 12V To 5V Volt Power Supply Module With LED Voltmeter Display Compatible With Car Motor Buck Review

Voltage and current and full charge indicator. Main point I got these was for the current adjustment, to turn down for less heat on projects and testing works good. Form factors a bit large wish there was a smaller unit size is every thing when DIY projects. Also going to test if the full charge indictor stops the voltage flow for charging batteries ( would like to be able to walk away for coffee or other things and not have to worry)If so this will be worth the $

These are either miss labelled (not really the 'HVS' version) or the description is just wrong. I tested one with 12 volt input - worked just fine. Then tested it on a battery with 47.3 volts - worked fine. Then tested it on a battery with 50.3 volts and it blew immediately. Vendor needs to re-edit the description where it says, "4.5-53V." That is just wrong.Addendum - in all honesty, I posted the question about 54 volts after I ordered these things and Cbas responded with a terse "no". But…

I intended to add a USB port & phone charger to my 48v Ebike, which outputs around 51vdc when fully charged. After exploding the first one after properly wiring on the ebike, I proceeded to slow-kill the remaining units on a benchtop power supply. Even with inputs as low as 40v, this simple task of stepping down voltage to 5v is problematic. There's aren't a lot of variables at play here: Wire input voltage, wire output voltage, adjust potentiometer. So within that useage scenario, I have…

Every board shipped to me was faulty. None of them are sleeved from one side to the other, not on the inputs or the outputs. How anyone got these boards working is simply amazing. Hence the one-star review. Maybe the vendor is unaware of this?

This makes a great power supply for devices powered directly from a 48vdc battery. The input caps are able to withstand normal battery charge conditions. It may not do well if used with alternator charging with risk of charger load dumps.

I got a package of 5 and was not able to set the current limit on any of them. I adjusted the current set potentiometer from one extreme to the other, but the short circuit current remained stuck at 2.5+ Amps. Can not be used for battery charging, but only as variable voltage power supplies. Can't argue with a 4.5 star rating - maybe I just got some from a bad batch.?

Easy to set-up and adjust. Output seems stable so far. Found a case for it on Thingiverse to 3D Print and isolate the bottom from incidental contact.Would definitely buy again, but, I only needed one for now, so I have plenty to last. Great Value.

I'm using a couple of these to derive 5 volts from 10S lithium packs (42-43V fully charged), and they seem to work.I'm not using the full rated current but I did test one just to check, and they do seem to limit output current rather than self-destruct.Some reviews have mentioned these exploding at less than their rated voltage. I haven't seen that with this batch, I tested several and they perform to spec. Not sure where the manufacturer sources their ICs, there may be variation among…

They work great, as the input voltage fluctuates from under 12 volts to over 14 volts the output stays at 5.25 +/- 0.03 volts.

Using to power a raspberry pi. Constant undervoltage warnings when tuned to 5.1 volts as required, or even when tuned to 5.25 volts which is USB rated maximum. Source power supply is 24 volts at 350w (15 amps) so that's more than enough current. Will try adding capacitors but probably just gonna keep using external power so I don't ruin my computer.

Working well so far. If I have one critique it would be there's no easy way to keep the display turned off. It's not documented, but a medium long press on button will turn display off. However, if power is removed, display comes back on when it's restored. Annoying. Still, inexpensive, accurate, and works well otherwise!

Each come individually wrapped then group together into one big bag. Used it on my Ender 3v2 in this nice housing I printed. using it for 24 V in converting to 12 V out.

Input cap is 63V and chip is a HV part, so other than the output cap rating, these are likely fine with a reduced output voltage range.

EE here ordered LM2596LED, the device voltmeter and output voltage drops as load current increases. The problem is the feedback connection is not connected directly to the output pad (but instead is back where the inductor is). Output appears to have a 0.3 ohm drop which translates to 14.5V dropping to 14.2V when loaded with 1 amp (more current will have an even greater drop, the effect is linear).The meter appears to be accurate (19V in reported as 18.9V). FYI/instructions: pressing the button

Excellent product . Using it to lower 40 DC volts to 12 DC volts. I let it run for a whole day to see if the voltage was maintained. It did so excellently.

Nice compact package. The input and output holes are not plated through so you need to solder both sides. May require frequent calibration to ensure accuracy.