EBOOT Mini MP1584EN DC-DC Buck Converter Adjustable Power Module 24V to 12V 9V 5V 3V(6 Pack)

Excellent adjustable buck style voltage regulators.. don't get hot, provide a soild voltage feed with raises and falls that stay within 1 to 2 hundredths a volt.. give a fairly clean output voltage (still need a LC filter if you want very clean wave forms) provides 0.6 to 23 volts from my testing.. able to pull a constant 3.5 amps off it at 16.8v without it getting hot 2.5amps at 20volts gets warm but ok... 3amps at 20v will cook the coil in about 20 minutes.. at 12v I was able to pull a solid 4.2a off it for 2 hours and the temp never got above 97F, 4.5a at 12v smoked it in 7 minutes... If you cook the coil on it it does NOT allow full voltage to pass through (I have had some buck regs fail and allow full voltage to pass through for a few seconds.. I killed two of these intentionally to make sure that when it failed no voltage pass through and on neither one did that happen and that makes me VERY HAPPY. A failure acts like a breaker, it fails it fails and circuit is instantly broken.. I tested this with a O-scope and it had 0ms of full voltage seep when it failed..) These are incredibly cheap and excellent quality.. over preform and stay dang steady.. These are without a doubt the best cost to preformance ratio bucks you can buy... Bucks are not a place to skimp and buy as cheap as possible BECAUSE a failure on a buck that is supplying constant regulated voltage to high dollar electronics and fail and allow unregulated voltage to seep by for even a 1ms can damage sensitive to voltage electronics and ruin your day and make you wish you wouldn't have saved that 30 cents per piece.

I used this to reduce the speed of a 24V fan, making it nearly silent. I snipped the fan wires and soldered them onto this board, then taped it down. Turned on the fan and adjusted the screw until it was the right balance of airflow and noise. Overall, works really well and price is great.

It worked great when I tested one of them. So I permanently glued it to my setup. And now the potentiometer is not changing the voltage on 3 of them. I am pretty sure I didn’t turn it too far but who knows maybe I applied too much force. So just be gentle I guess. Giving it 1 star because the product was great when it worked. But didn’t even last a few seconds of adjustments. EDIT: I changed my mind. They are working really good now. Yeah the potentiometer can be finicky but it works. By trial and error you can get the right voltage. Just be careful to go really slow and gentle while changing voltage. Don’t push down too hard and turn slowly.

I used these convert my SmartThings Multisensors to run off 12V power. I already had the sensors installed for a couple years, but they kept eating batteries! They eat battery (even if they're close to a Zigbee relay) because there's no way to disable the temperature or even adjust the reporting frequency. Apparently there used to be a way in an old SmartThings device handler, but that has been removed. Anyway, I decided I was going to replace them with magnetic open/close sensors and run wire to them like the "good 'ol days"A. Then I could use konnected to make them smart. Then I found these. They're small enough to fit inside the SmartThings Multisensors without having to replace the case (some small mods had to be made) and they're cheap! So I bought a inexpensive Mean Well 12VDC 60W power supply (planning on converting a lot more sensors) and ran the wire. I'm dropping12V to 3V and the sensors don't consume much power so these aren't giving off much heat. I also am not having any issues with RF interference. Some other reviews mentioned the buck converters hurt some of their wireless devices. Doesn't seem to be bothering Zigbee on the US frequencies... My issue with the device is the POT. It is extremely hard to get right. I have a couple sets of mini screwdrivers and I couldn't find a single one that could fit and turn the POT without stripping the head. I ended up using a micro flat head, and struggled to get it to stay in. The problem with this method was that the POT is VERY touchy. I wanted to stay within 0.1V of 3V and that proved to be a challenge. But I finally got it, and I have 7 multisensors running off 12V hardwire power reporting 100% battery. One last thing... After using 6 converters, I noticed that one of my static bags was sealed but there was nothing inside. I contacted the seller about it, and they immediately shipped out a whole new set! I had only requested one since that's all that was missing, but I supposed the logistics of getting just one and the cost of doing so didn't make sense. Anyway, I was really impressed with their customer service. I'll definitely be buying from them again.

Work like a charm. I used them to rewire Christmas village lights. Damn department 47.

I haven't tested much beyond setting the voltage and forgetting it. I used it to create in all-in-one module for adding bluetooth to an older car stereo and it also powers a wireless charger. It has been stable and consistent for over a month now. I have read other reviews of input voltages exceeding the rating of the filter capacitor, so it's something to be wary of, but unfortunately there is no way to check the voltage rating of it so I cannot vouch for that. Love it overall, great package size, efficient and a wonderful value. Good to have in the bin for later projects.

Device oscillated when turned on with 2 to 5 volt output swings at 1 kHz. Set pot to middle (which was likely the original setting) and same. Soldered in another and it was the same. Watched output while turning the pot and device works great when pot is set for output below 4.5 volts with 5 volt input. Pot at middle is outside the working range for 5 volt input. Hope this saves others some time and frustration.

I got these to power a raspberry pi on my 3d printer. it was really simple to set it to 5.3v out on 24v in and it gets warm but not to a concerning level. voltage seems steady. Seems to be working great! cant wait to use the other 5 somewhere

As described. Works perfectly.

It had the right pin pitch for a breadboard and the pot could be adjusted to get the right output voltage.

This device is small and adjustable to any voltage within the range specified, not just the discrete voltages listed. ie you don't select a voltage from a finite set of choices, you adjust it to anything you want in the range. Once set, it doesn't matter what the input voltage is, so long as it's within the specified range. At 3A rated output, it's perfect for mobile application payloads (eg. on drones), instrumentation platforms, and so on to name a few. At the low cost these devices sell for, I'm going to buy another batch just to have them around for those last minute projects that need a great stable power supply.

I used this buck converter to convert a set of solar LED string lights to run off the 12v battery in my tent camper. I simply connected it to a spare 12v battery on my bench to set the output to 3.5v before shrink-wraping and installing it by splicing into the existing exterior light circuit on the trailer. I was concerned that a higher input voltage while charging the trailer battery may effect the output voltage but it does not. Steady 3.5v regardless of input voltage. I will report back on dependability and heat generation after I've run them for an extended time in a few weeks.