Mini Step-Down Power Supply, Intelligent Home Switching DC Power Module AC DC Isolated Power Module 220v to 5v, HLK PM01 AC DC Converter 220V to 5V（3PCS）

Fantastic

Bought less than a month and tried one with a laser diode works out pretty well so far. Will see how long it goes. Based on the light condition, it’s pretty steady means the output voltage is steady as well.

Great supplies, compact, work well

Good product for the price, really. Not an instant supply when turned on, takes about a second and slow drain when off if that is an issue for your project. Someone here says is not breadboard friendly. It is, with a small modification. The supply rail of the breadboard is most likely continuous supply of power along the breadboard. You only have to snip the track underneath the bridges like sections on one end of the breadboard the mini power supply will fit perfectly sideways with the dc prongs on each side of the bridge

Muy buena fuente resuelve

I was taking apart 5v power adapters when I needed a 120v to 5v power source for my small projects. This saves some time, is much cleaner, circuit-board mountable, and only costs a little more. The data sheet suggests a putting protective filtering components on the 120v side of the supply.

Was iffy when purchasing it but turns out it was a really good buy.

These units are great for powering ioT projects. They are compact and can be built into the device enclosure instead of having to use a 5V wall wart and a USB cable. Voltage output is stable and they run cool. My applications have been at 500ma or less.