DC Power Supply Variable,30V 10A 4 Digital LED Display Adjustable Regulated Switching Power Supply Digital with Leads Power Cord (30V 10A Black) Used for Spectrophotometer and lab Equipment Repair

FINAL UPDATE (Hopefully!: I have now been using these 2 supplies for around 4 years and have not had a lick of trouble with either of them. They run very quietly, are very accurate and hold their settings perfectly. I would still recommend swapping out the amperage potentiometer for multi-turn (as long as you are OK with soldering) but it's still a great power supply without it.++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++I really like this power supply. One of the main reasons i bought it was of course its price, but the reason i chose this over the other cheap ones was that, from the reviews i saw on YouTube, the others often seemed to have trouble with the Volt/Amp potentiometers (control knobs). They always seemed to be cheap single-turn ones that failed pretty soon.....and that's why i liked this one, because i knew that the Voltage control pot was multi-turn, and hence was definitely better quality. I am only a real newbie at electronics, but i had learned at least enough to know that. The Voltage pot IS multi-turn and it is easy to get it tuned in very easily. I have seen other guys struggling to tune in the Coarse/Fine pots on other supplies. The Current pot on this one, however, is NOT multi-turn and i wish it was....but it's still smooth and easy to work with. The calibration seems spot-on out of the box, but i know that i can fine tune it if need be from the trimmers inside, so no worries. UPDATE: I just purchased a second one of these and checked it out internally.....it is VERY easy to upgrade the current (amps) control to multi-turn also. I see they are 10K pots (WXD3-13 2W 10K...Google it) and i just purchased ten of these for $13 from Ebay and will be installing one in each of my power supplies' current contol. It's not a big deal but for $1 or so then why not?The other main reason i chose this one was that i saw how the other cheap supplies have the BIG flat heat sink aluminum plate slapped straight across the air flow towards the rear of the case, so all the other components get fried at the expense of the main chip staying cool! That seemed awful design to me. This chip has plenty of cooling (on nice proper finned heat sinks) but so does everything else because the main board is set parallel to the case so gets plenty of air flow. The fan cuts in and out under thermal control, except it does a quick self test upon power-up. The only thing i would wish here is that the speed could also be thermally controlled, but that is nit-picking and i could modify it myself anyway later if needed. The fan does NOT seem unduly noisy when it does come on and is not annoying to me.The voltage actually runs up to 31.9 volts and the current to 11.4 amps, so you get plenty for your money here. For newbies (like me!) to set the current, you have to short out the croc clips while at a low (4 to 7) voltage. After that, upon applying your load, the current will gradually increase as you increase the voltage....until you hit your set current and then it will switch to constant current mode and only the voltage will increase. OK, i will quit teaching the experts how to suck eggs here and leave it at that.In my view, this is an EXCELLENT power supply. The only reason i have taken off one star is because 5 stars would be "perfect" and since that doesn't exist, i have taken one off for the above nit-picky points. There aren't many reviews online of this power supply so i wanted to help correct that. My supply has worked faultlessly since purchase but that has only been a week, although i have tested it pretty rigorously in that time. If anything should change regarding my review, i will make an update here to let people know. I was going to purchase this on Ebay but then noticed it on Amazon for only a couple of dollars more, so i thought it was worth that to get the better "returns" peace of mind because with my Prime membership they will pay the return for me and i can also try it free for a month and, if i don't like it, i can return it for any reason. And no, Amazon don't pay me for this! Lol!UPDATEOK It has now been around 10 months since my purchase (just bought a second one!) and just wanted to say that there has been no change to my assessment. This power supply has been great in use and has never given me a problem. Just for those (like me) that worry that the thing might blow up after a month or two, it has never given any hint of a problem, and some of my usage has fairly put it to the test. OK...that's it. I will update again if this changes, also.UPDATE2I have now swapped out the current pot in my supply for a 10K multi-turn pot and it is now a SUPERB power supply! It really has made a huge difference for the cost of $1.30 per supply. I highly recommend this modification AND the supply.UPDATE4 (3 was at the beginning)Six years now and counting. This thing is now perfect with no issues at all. I have now updated the stars here to 5 stars....it's perfect.

Worked great until it just wouldn’t turn on one day. I didn’t use a lot but when you need one nothing else will work. Ask about repair but no response.

The media could not be loaded. usually accurate to within .5V (highest difference 1V, i think) if you trust my multimeter.delivers enough power for what i needhave run for 1 hour 20V@2A no heat issuesincluded cables are fine.

Well built and has worked great now for many months - Heavy duty construction.

Esta fuente de alimentación me ha encantado, ha dado la talla, y esta funcionando perfectamente para lo que la necesito, otra herramienta que me esta ayudando a ser mas eficiente en mi trabajo.

Beware i bought this twice on purpose because this listing changes after you order it. You cannot find any information on the one that gets obsolete and good luck trying to return it because that is after the return period and then you start to wonder if this thing will be safe to use.The second nope, the first one I bought still works despite being 4 knob, it does have cv and cc on my model but there are no buttons on the front just a USB 2 port.I tried working with Amazon about this a few times and didn't get much luck so hopefully I can share my experience here.I would not recommend this product due to shady listing and documentation. The hardware is decent, but my leads broke on both models shortly after use and the banana jacks are terrible quality, so bad that there is no way I would 30v and 10A == 300w through this garbage.So mad.

Great small, but full feature power supply. I bought it to run my HO Slot Car track as it’s the one featured in Viper and other YouTube videos for their tracks. Using it right now to charge my wife’s dead car battery. Car hasn’t been driven in over a year, as she had consecutive knee replacement surgeries. I let it slide. The charger is quiet, cool and easy to use. Moreover, it comes with several very useful connectors. I have a high power jump battery pack but the car battery was completely dead, so that wouldn’t work. It is fully protected for over voltage, current, and heat. Humming along at 13.8V and 6amps right now for two hours. Unit has no heat issues and is very quiet. I’m happy.😃

Worked perfectly.