Color Display Adjustable 90W DC DC Buck Boost Power Converter CC CV 0.5-36V 5V 6V 12V 24V Power Module Regulated Laboratory Power Supply

I spent much time researching bench power supplies. I wanted a low noise power supply with many features, but I did not have $70 to spend on traditional power supplies with encoder buttons, memory settings, and overcurrent protection. So I decided to try the SK90C buck-boost power supply.Wow, was I surprised!First, it is important to state this is really a DC buck-boost power converter rather than a traditional power supply that takes 120V AC. With that said, since the SK90C is both a buck and boost converter, it will take any clean DC power from 5.5v to 36v. Therefore, if you have an old laptop power supply lying around, then that will likely work. Just remember, if you want to use all 90-watts of the SK90C, then you will need about a 100-watt power input to the SK90C.I tried the SK90C with a cheap wall-wort as the DC input and checked the noise with my oscilloscope. The electrical noise from the SK90C was terrible while using a cheap wall-wart. Next, I tried the SK90C with a battery as input and the oscilloscope showed less than 100mV peak to peak switching noise, which was excellent for a bench power supply. Next, I tried the SK90C with an old 75-watt MacBook Pro power supply, and the oscilloscope again showed less than 100mV peak to peak switching noise while under different loads.With that said, I did notice the SK90C has more noise while boosting voltage rather than bucking voltage. Therefore, I recommend a higher voltage input (19v laptop charger) rather than a lower input source (8.4v RC battery charger).Second, the amount of features this has is impressive. Not only does the SK90C have over current protection, it has: 11 memory settings, overvoltage protection, over power protection, over temperature protection, over amp-hour protection, and many others.Another key feature is the SK90C can be quickly and easily calibrated. If you noticed the voltage or amperage readings do not agree with your multimeter, then follow the SK90C instructions to calibrate voltage or amperage readings. I found the voltage reading agreed with my Fluke 79 multimeter, but the amperage differed by 5 milliamps. For most people, 5 milliamps is plenty accurate, but not for my 11-year-old son who wants to tune 20mA LEDs for maximum brightness. So, I followed the SK90C instructions and was able to calibrate the SK90C to less than 1mA of the measurement from my Fluke 79. That is very impressive for a bench power supply that cost less than $20. Traditional bench power supplies that cost less than $70 cannot do that!!!If you are looking to spend $40 to $70 on a bench power supply, and you only need 5 amps or fewer than 90-watts, then you need to give the SK90C a try.If you have a 3D printer, then check Thingiverse or Printables for an excellent case for the SK90C by Paul0.

Works well

Nice features, simple to panel mount. Just fed with a cut 18v/3A laptop charger cord. All voltage measurements are within 1-2%. You will need instructions for programming, not necessarily intuitive..

Very good product not cheap. Very quality. I love the weight of it. It looks of it the way it work just what I need. Haven’t had no problems with it yet put out the output that I need and more. I am using it to cool oil coolers on my truck we’ll buy again

I bought this to control the charging voltage/current for a 12V LiFePO4 battery, coupled with a USB-C PD controller. That combo is really good.Out of the box it will show you the input and output voltages, very nifty if you want to check that everything seems fine.The menu system is a little complex to manage, and the included instructions only give you so much information. The menu allows you to config multiple presets for constant voltage and current. About that, it actually gave me a couple of good scares within the menu system, since the ON/OFF button is also used to activate/deactivate a particular preset (and the predefined presets are all max voltage, try charging a 12V cell with 20V out of a PD controller).You can only choose between constant voltage and constant amperage. In CV mode it will always push the required amount of voltage while trying to give you the specified amperage. In CC mode, voltage will drop but will always give you your required amperage. For my particular usage, I have always used CV mode.There are some other meters with graphical interfaces and colors and all, but I love the simplicity and looks of a good LCD screen like this one. The viewing angle is a little iffy of course, but still looks miles better (and can be seen from farther away) than a backlit color screen.

Good gadget, lots of features, but you can't access half of them without hunting down and downloading the manual. It should damn' well be included, especially with a feature- packed gadget like this.

Nice voltage booster nice display looks to be well made at least you can use 12 awg wire with this booster will make a nice project power supply of course you have to have 12 volts to drive it, either with a battery or power supply. Something to keep you busy. Adjustments are fairly easy no directions but most people that work with electronics can figure it out or go to you tube for a video. For twenty dollars you can't go wrong. I edited this review worked for my power supply project.

Does what it says so far. Takes an hour to really get to know how to use it but I will definitely buy more for all sorts of projects. I’d like to see just a little more in depth manual on the UI but the information they have is good enough to get you started. Very very impressive buck/boost converter!!!I like the flush mount design. I think that works very good on most projects it was a smart move!!. It would be awesome if the manufacturer came up with an accessory ‘junction box’ that the unit snaps into and can be wall mounted & another version that can be floor mounted with 45 degree viewing angle of the unit. There’s a few different options that can make it easier to implement neatly into a winder variety of projects, but anything can be custom made so do not hesitate to purchase you will be very happy.