– Universal Power Supply 3V~24V 3A 72W Adjustable Variable AC/DC Adapter Charger, 100V-240V AC to DC Converter with LED Voltage Display & 14 Tips & Polarity Converter

This adjustable power supply has been a game changer for my electronics projects! The Wefomey Universal Power Supply offers a wide range of voltages from 3V to 24V, making it extremely versatile. It’s perfect for powering various devices, and the 3A output ensures enough power even for more demanding gadgets. The build quality feels solid, and the adjustable dial works smoothly, allowing for precise voltage selection. It’s also compact and easy to store. Overall, this is an excellent, reliable power supply for the price, and I highly recommend it for anyone needing a flexible power solution.

Bought as my daughter lost the charger for her 3d printing pen. Build quality is goodand having multi power dial makes it great for everything.

Needed to replace a power supply for two different devices, ones which I only use occasionally, but need an external power supply to work, so bought this. The selection of tips is great, as is the reverse polarity adapter, although I would say it would have been better to have a physical switch on the main PSU to reverse the polarity rather than the adapter cable. It you forget you have the adapter installed, you run the risk of damaging the equipment you intend to power. You have to look at the main unit to set the voltage anyway so a switch for polarity would have been helpful. Works well and luckily didn't need to power anything below 3v as this is the lowest setting.

I've been using this for several emergency applications over the last 6 months and worked perfectly every time! TV power went, put this in while I ordered another, happy kids. Work flood light charger went missing, no problem as this worked a treat and didn't have to work in the dark! Love the voltage readout and granular stepping up of the voltage, so clear and easy to use. Great range of adapters.

Good little adjustable power supply to have around. 5A output makes for a good spare test supply on the bench. Has all the usual equipment adaptors in the box. The digital voltage display is actually quite accurate. Would recommend!

Plugged it into the batter to charge. It 'popped' got warm. I hadn't even plugged it into the 3 pin socket yet. I tried with the adapter and it sparked when it wasn't even plugged into a 3 pin outlet. Feels pretty sketchy. No thanks

Vesatile and good quality

I like the charger

I got this to help me work on some single board computer (SBC) projects at home. At the office I have access to professional bench supplies, which are expensive. For $18 this does what I need it to do. The following points are for information in case you are looking at this - not complaints, but things to be aware of. I have access to an accurate (Fluke $$$) handheld multimeter at home, not all do. On my unit the voltage displayed on the readout is around 0.1V higher than the actual output. It's pretty much constant regardless of the output setting. So without a load I can set the voltage on the unit from 2.91 to 24.4 volts (indicated) which is actually 2.82 to 24.29 volts (measured). For $18 I can live with that. One thing that may trip you up is that it appears that the output cable uses 24 AWG wire, resulting in a resistance of around 0.190Ω. While that might not sound like much, at the rated 3 amps that's a voltage drop of 0.57V. I've got SBCs that need a 5V nominal supply, and that run some USB connected peripherals. The 5V SBC can draw up to 2A if it's also recharging its backup LiPo battery, so if I set the supply to 5.00V I'll actually be getting 4.92V, and after going through the output cable I'll lose another 0.38V and be at 4.54V going in to the SBC. This is getting very close to the USB sec minimum of 4.40V, which is what goes to the USB-A ports on the SBC via current limiters that introduce a small drop themselves. This can all be cured by raising the displayed voltage to 5.5V, but it's something to be aware of for those that don't have the ability to measure the actual voltage under load. I love the huge array of cable ends that come with it, including alligator clips and a screw terminal block. One occasionally encounters a device that's been designed for some reason with the central pin negative, so the polarity inverting cord is a great touch. The adapter itself is equipped with a 5.5x2.1 barrel which is about the most common used in this voltage & current range - so no adapter needed! As another reviewer noted about the only thing I miss is a 5.5x2.1 to USB-A female but those are easy enough to make up with hand soldering. Watch out for the 1 in/4 out 5.5x2.1 fan out adapter - the 4 output leads are TINY and I would not be surprised (based on voltage drop measured) if they are 28 AWG or 30 AWG so you'll get some serious voltage drop through there on any heavy draw. Finally, at low voltages the adjustment is pretty sensitive, so I'll probably replace the knob with a larger diameter unit. It's got a 6mm splined shaft and the knob pulls off, so plenty of those available. Not sure I'd use it as a permanent replacement but for the bench it's great. May buy more.

Excelente fuente de alimentación de VDC, el voltímetro que indica el voltaje es preciso, el kit de accesorios de conexiones es bastante extenso y útil.

Nice little power supply. Does everything it should. Appears to be made including the included connectors.

If you are missing any power cord, this item is excellent. No time wasted for unusual items. Has connections for just about anything. Works like a charm. I used it for an electrical Christmas decoration.

The additional cables allow for pretty much anything you could need. The tiniest nudge of the knob can jump you 5 to 10 volts so it's difficult to fine tune to exactly the voltage you want but it can be done if you're careful. My multimeter said the supply was about 1.5 volts off but that is easy enough to correct. If I were using this to power a device I would be worried that something might nudge the knob and burn out my device. I'm using it as a poor man's bench power supply for testing components. I bought a cheap set of multimeter probes and just spliced them on to the end of the supply cord. Now I have a cheap adjustable power supply. (as long as you don't need to adjust amperage)