SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm

It does what you want and does it very well, but also gives you so much more for the money you pay. There are plenty of advantages over your standard Wall Wort type Power adapter, among which are: You get a digital display that shows the DC voltage output value, which is also what you use to set the desired output voltage level. The potentiometer is very smooth and not too tight, such that it's easy to achieve the actual voltage value you need. The output voltage is accurate to what is displayed on the display of the power adapter, and also it's easier to use than many of the standard AC/DC power adapters in that you have a long cord that gives you a nice tight plug to use to plug into the outlet verses several other Power Adapters on the market what contain the transformer within the plug that you plug into the outlet source. The vast and large selection of adapters that are included with the power adapter also mean that this is a multipurpose Power Adapter that you can use with several different devices requiring many different plugs. This means you only need one adapter rather than one for each device, or you have one adapter that works across several other devices. As long as you specify the correct amperage sufficient to operate all your different DC devices, you only have to make one purchase rather than many different ones.

I bought this for my aquarium light. It has worked as expected for the past two weeks. The adjustable voltage feature is nice if I want to use the power supply for something else in the future.

I bought two of these units. Their price was a bit higher than other units, but I wanted to see how well (useful) the LED readout worked and the large tuning knob. I also like the higher output amperage (power) to price ratio. And they received good ratings from many amazon users. My short suggestion (tldr) is: I'm cautious by nature, so I can only cautiously recommend these power supplies to people that don't have a voltage meter for checking the voltage that you want especially if the device you're powering is voltage sensitive. I tried two of these units and got some results that varied a little between the two (detailed, below). I've documented my observed voltages and anomalies, below, if you want more background on this concern of mine. But if you know what you're doing, and have measuring equipment, I think these risks are lessened. I haven't decided if I will keep them yet or not. Having my own volt meter, the RED LED readout on these units is a little redundant for me, but could occasionally come in handy if I remember about how far each unit is off from readout voltages. I will ponder. If you want to know other observations and details I documented, read on: * These power supply units have a very basic instruction manual. But at least they have instructions! * The instruction manual covers the topic of output polarity and the use of the polarity reversing cable (not an extension cable). * It takes several seconds after turning on before the readout lights up. And several seconds after you turn it off to stop delivering power (with no load attached). This is not a bad thing. Just an observation. This is also briefly mentioned in the instruction manual. * It seemed to me like the higher the voltage, the harder it is (the touchier the knob) to dial in the exact voltage you want. I found that when I needed ultra fine control, I could place my thumb on top of the knob (instead of grabbing the knob with thumb and index finger on the sides of the know), and have a little more control over minuscule movements to dial in the exact voltage I wanted. In truth, being 0.1 volts off isn't going to hurt most devices too much. * Having the knob be so touchy and easy to turn means that it will have to be used in a location where it wont be accidentally bumped / moved by pets / people. * Of my two units, the first one tested much closer to actual, indicated voltages, whereas the second unit was delivering noticeably higher .2v-.3v than built-in LED was indicating. I've listed voltages I observed in both units below. It's interesting to me the differences in voltage outputs between the two units. Of course the instruction manual covers this situation by stating that you should use a voltmeter to double check actual output voltages if you need finely tuned (accurate) voltage. * Sometimes, after setting and then not touching the knob for a short period, the built-in indicated LED voltage would wander a little bit. +/- ~0.1v. That's not horrible. * I'm disappointed that neither unit could deliver an actual 3.00v. Some 3v devices, like LEDs, are sensitive enough that 3.3-3.4v is too high. I'll have to go with a different power source for these applications. * These units have a 3-prong grounded AC plug (good). * Housing is firm, rectangular (plastic) with mounting brackets on either long end of the power supply. * I was pleased at the amount of different tips that came with the unit, although I probably wont be using most of them as I have a specific purpose in mind, but I like having the variety available to me in case I did need them in the future. I kind of wish they sold a unit without tips to save a couple of bucks, but I realize that's probably not feasible for market demand. * Their method of reversing the polarity is quite unique (to me). I am used to the old method of a switch on the unit to reverse the polarity, but instead, they're supplying a short connector wire that you can install in between the device and your tip that will reverse the polarity at the tip. Seems like a better method, to me, once you are aware that is what it is for. * I am concerned for others by the USB nature of this power supply; there are two included USB tips you can use: One male USB micro B and One male USB-C. However, no instructions I could find tell users that the 5v setting should be used for the USB tips. It would be unfortunate to accidentally select the wrong (higher) voltage when using the USB tips on a USB device. * I am pleased to see assurances of safety features on the box: "over voltage protection", "over-current protection", "short-circuit protection", "over-temperature protection", "fire-retardant outer shell", "Anti-EMI interference", but I dont have the resources to test that these are true. * Construction seems sturdy. I did not notice any defects. But I'm also not going to be stressing this unit. My output voltage observations: Unit #1 3.29v LED readout => 3.26v voltmeter 4.50v LED readout => 4.50v voltmeter 6.00v LED readout => 6.01v voltmeter 7.51v LED readout => 7.52v voltmeter 9.00v LED readout => 9.03v voltmeter 10.5v LED readout => 10.54v voltmeter 12.0v LED readout => 12.03v voltmeter 13.5v LED readout => 13.53v voltmeter 15.0v LED readout => 15.04v voltmeter 16.5v LED readout => 16.52v voltmeter 18.0v LED readout => 18.02v voltmeter 19.5v LED readout => 19.51v voltmeter 21.0v LED readout => 21.0v voltmeter 22.5v LED readout => 22.5v voltmeter 24.0v LED readout => 24.0v voltmeter 24.5v LED readout => 24.4v voltmeter (24.5 is maximum for this unit) Unit #2 3.38v LED readout => 3.40v voltmeter 4.52v LED readout => 4.58v voltmeter 6.01v LED readout => 6.09v voltmeter 7.51v LED readout => 7.62v voltmeter 9.02v LED readout => 9.15v voltmeter 10.5v LED readout => 10.69v voltmeter 12.0v LED readout => 12.22v voltmeter 13.5v LED readout => 13.81v voltmeter 15.0v LED readout => 15.26v voltmeter 16.5v LED readout => 16.82v voltmeter 18.0v LED readout => 18.24v voltmeter 19.5v LED readout => 19.78v voltmeter 21.0v LED readout => 21.3v voltmeter 22.5v LED readout => 22.8v voltmeter 24.0v LED readout => 24.2v voltmeter (24.0 is maximum for this unit) FYI

I recently acquired the 'SHNITPWR 3V ~ 24V 3A 72W Adjustable Power Supply', and it’s been an absolute lifesaver. The range of voltages it covers and its adaptability is what really sets it apart. With an adjustable output of 3V to 24V and a 3A current, it caters to a wide array of my electronics, from routers and LED strips to small household appliances. What impressed me the most is the inclusion of 14 different tips, ensuring compatibility with most of my devices. The versatility is unmatched – it’s like having a universal charging solution at my fingertips. The 5.5x2.5mm, 4.0x1.7mm, and 3.5x1.35mm tips are particularly useful for a range of gadgets I own. The build quality is solid, and the adapter feels robust yet compact. I appreciate the safety features built into it, like over-voltage protection and short-circuit prevention, which give me peace of mind when using it with my more sensitive electronics. Another highlight is its efficiency. I’ve noticed a stable power supply without any fluctuations, regardless of the voltage setting. This reliability is crucial for me, especially when working with delicate electronic projects. In summary, the SHNITPWR Adjustable Power Supply is a top-notch choice for anyone looking for a versatile, reliable, and efficient power adapter. Its wide range of voltage adjustments and plethora of tips make it a universal solution for almost all your electronic needs.

Shnitpwr 72w universal Adaptor: * Confirming it works with Pinecil. knob moves fairly evenly between 3.5v-24v * readings close enough (20.9v on adaptor shows 20.6v-20.7v on meter) * has some certification stamps on it that I did not see on other really cheap ones sold by other vendors. * bonus - many DC converter adaptors included (default DC cord fits Pinecil 5525 with no adaptor needed) * includes short reverse polarity cable adaptor in case some device needs it. check device polarity before plugging anything into universal AC adaptors to prevent destruction. most people will not need to use the included short cable that reverses polarity. * minor issue: it does not truly turn off right away, low voltage jumps around on display for few minutes as capacitor slowly discharges. One reviewer on youtube said company knows about it/ is working on future improvement. * Note: I do worry about low cost adaptors plugged into AC for long term, so I always unplug it from the wall when I'm not using it. * works great for Pine64 Pinecil soldering Iron. I was using this at 21V since that is the max Pinecil is rated for. After I did the modification of Pinecil to support 24V (see pine64 discord for instructions) . Then I increased it to 24V and that works well too. * Overhall, very useful and diverse charger, I have no issues with it getting hot, only the tiny LED display gets a little warm but that is normal. don't forget to peel the clear plastic off the LED display. * This comes with a 2-prong non-polarity plug (blades are same size) . sometimes there can be issues with 2- prong chargers and flipping the plug over in the wall fixes it. * I have no issue with this charger at all so far, 5 stars . If something happens to this I'll come back with update.

This is a compact variable DC power supply. It has a digital display of the output voltage which is accurate to 2 decimal places. The power supply comes with a variety of adapters to fit many DC input connectors. It also has an adapter for bare wires, which is what I am using. The nob to adjust the voltage is very sensitive, it doesn't take very much movement to change the voltage by a tenth or so, so dialing in the desired voltage requires care. Once set, the power supply seems to be very stable over a 50-degree temperature range. I am using the power supply in an unheated outdoor shed and temperature has gone down to the high teens so far this winter. I am very pleased with the quality of this device considering it's very reasonable price.

Amazing so far. Instantly fixed my HDHomeRun Prime issues. I thought my 11 year old Prime was dead, but it was just the power supply. One suggestion for this power supply is to add clicks or some resistance to the voltage adjustment knob when turning it OR maybe add a lock on the knob. Someone (kids?) could easily brush up against the knob and raise the power level accidentally while its connected. That would be bad.

This power supply just didn’t work. When I plugged it in, the LED lit up and using the knob, I was able to adjust what I thought was the voltage output. However, when I connected the power supply to any type of load, everything went dark. There was no power output, there were no lights from the LED on the front of the unit, it was just dead. This unit is a complete junk. Do not buy. Unfortunately, I waited until after the return period was up to try it out. So, I am stuck with this piece of junk. Do not buy.