NOYITO AC to DC Precision Buck Power Supply Module AC 120V 100V-264V to 12V 500mA Isolated Step-Down DC Module (12V 500mA) Green

I'm using this to power a digital volt/amp meter display in a dim bulb tester (DBT) I built to test old tube radios, which needs a minimum of around 8vDC in order to turn on. Because I'm also using a variac before the device I built in order to limit AC voltage going out of it, I had concerns over this power supply listing a minimum of 100vAC for input so I went through the trouble of adding a DC input jack to the circuit as an alternative power source for the digital display when using the variac at low voltages. While I don't know what DC voltage this device puts out at only ~20vAC (I haven't tested that), I do know that it's enough to power the meter display that I'm using. For my intended usage, I didn't even need to add the DC input jack in my DBT design, but that's okay because it'll come in handy if I ever want to use my device to monitor current draw on lower AC voltage devices. Been using this power supply a lot in the past couple weeks and it's been doing great so far. Very happy with it!

worked 1st time when I replaced the failed one. No issues.

Nicely packed, neatly assembled robust switching PS. A great replacement for the crappy, ever-failing Definitive Technology W7 powered speaker power supply (see 3 burnt ones in photo). IMO & experience quiet enough for Class D speaker amp use.It needs extension in length to fit W7s mounting holes (it’s a tight fit @ bottom/24v out) plus adaptation of AC in + DC out jacks. I also added push on/off switch as these Definitive Tech PSs are always powered.This PS is best one I’ve located for this application and inexpensive too. BTW I’ll try to do full write up on this somewhere sometime soon.

Nice power source for hobbyist!

Works fine but needs better labeling for which is the ac and DC connection points. The DC output is the e d that has a +/- mark. The input is unmarked.

I've had one of these hooked up to a PC fan that runs roughly 8~12 hours a day every day for the past year and it has had no problems.

Small size and works properly

I may have had a bad one. It worked for three days with no load as I was testing the reliability of the board for a project. The board is well made and easy to use. The problem was the in the board itself. The line side blew out and arced over on the bottom of the board going into the transformer. I had hopes for this board going into it and was disappointed. I ended up getting a regular 12 volt/ 110 v power plug. I wanted this to work.