PHEVOS5v 12A Dc Universal Switching Power Supply for Raspberry PI Models,CCTV, Radio, Computer Project,LED Strips Pixel Lights(5V 2801, 5V 2811,5V WS2812B).

The initial product did not meet specifications. Based upon a negative review, the manufacturer contacted me and quickly sent a 2nd replacement unit which worked well. Not everything you buy is going to be 100% we all know that ... that's the way life is, but this manufacturer went the extra mile to ensure customer satisfaction. This is the kind of service we all like and appreciate. I would buy here again.

This is a basic switching power supply without any embellishments like cooling fans or overvoltage protection. It's a fuse protected rectified line side arrangement with switch mode bucking topology. All what you would expect at this price point. The design is minimalist, with only what is needed to get the job done, and that's fine for the price point. Being Chinese made with non-premium components (no Sprague, Dale or Ohmite here), the lineside capacitor is a 100uf 450v Dongbaohe brand, with 5 x 1000uf 16v WCO brand as final DC filtering. Despite being minimalist, it's well executed, with good build quality. Soldering is well done automated work with a generous amount of solder fillet on all leads. Long term stress cracking shouldn't be an issue as is common on some of this style PSU. I wouldn't use it in an industrial or any critical application, or use it to power equipment which could be damaged by overvoltage or excessive noise, but for hobby, shop, LED lighting or experimental use, it should perform well.The power supply came out the box adjusted to 5.02v, and holds it's output well under load. At heavy loads, it produces moderate heat, with little concern for overheating as long as it has good airflow available. I would mount it vertically if possible to take advantage of convection. If installed in an enclosure with limited air circulation, derating would be advisable. Adding a 5v fan would be a nice improvement, as would some additional output filtering, and an output fuse. All could be done quite economically.For it's niche, this is a really good value, and I plan on keeping at least one on the shelf for when I need a quick 5v PSU solution.

This 5v 12A supply arrived in good shape with no damage and was set to 5.1v out of the box which is reasonable.It has worked well for the last month, but I’ve only put about 5A of load on it. At that level of current, it runs cool so it is reasonably efficient. Internally it looks similar to other “frame” style supplies with old school through hole components. It is fused and the heat producing semiconductors make good contact using thermal compound. I’ve purchased similar power supplies that come with no thermal paste and poor frame contact so this was good to see. There is an input filter, L1/CX1, which should keep any noise from back feeding into the power input.The adjustment resistor goes from about 4.9v to 6v. I would have liked to see a tighter range than a full volt, 4.8 - 5.3v would be better. Most people won’t care, but I always worry that a bump to the potentiometer could cause it go too far out of spec. No doubt one could fix this if they want to go through the effort and have the expertise. I’ve done it on other supplies and it usually requires changing one resistor and the potentiometer.I would recommend this for those that have the expertise to test/set the voltage, and can safely wire it to mains power.

The raspberry pi 3 supposedly needs a 5v 2.5 amp power supply. No matter what I plugged it into, it would give low voltage warnings. I even tried plugging it into my Tablet's 5.2v 3A plug and it still gave the error on occasion. When I used my usb tester on them, it was always under 5 volts so they wouldn't put out good current and voltage unless it was used on their own device.I got the 5v 60 watt power supply and set it to 5.1 volts and I'm getting no errors. I tested the output voltage as I was expecting and it was still outputting 5.1 volts. I am currently powering a Raspberry pi 3B, an SKR 3D printer board (to keep the board in sleep and accepting a power on command when it's not on 24 volts, a MOSFET to control and dim the printer head lights via M355 command, and a power control relay to turn on and off the 120 volt going to the 24 volt power supply with M80 and M81 commands respectively. it's a bit overkill, but does the job well.

Right out of the box this power supply did not work. The power light did not illuminate and there was no output. Because of time I decided to open the power supply to see if I could see anything obvious. Well poor solder joints were obvious on the circuit board. Solder missing on some joints. So after correcting this brand new power supply it finally powered up. However, it still was insufficient for me. I thought buying a 12amp power supply for connecting to 4 half amp devices was overkill but 2 amps pulled the output voltage down to almost 4 volts. So I am not using this power supply and purchase a different one that actually works with no issues. Before you ask yes I adjusted the trim pot to get a little more output but still was only able to get 4.15 volts out