DC 12V Power Supply Driver Transformer - 15W Waterproof IP67 120VAC to 12V DC Converter Constant Voltage Switching Power Supply for LED Strip Lights, G4 MR11 MR16 Display (2-Pack)

The original power supply in my outdoor fixture was a constant current supply. It had broken and was causing the light to flicker. I found the original replacement on Amazon, but it was about 3 to 4 times the cost of this unit. The Wattage of this unit was slightly higher, and this unit was a constant Voltage supply instead of the original's constant current. LEDs want to be biased with a constant current. When using a constant Voltage supply typically a series resistor is used with the LEDs to adjust and set a constant current through the LEDs. I did not have a resistor with the "high" Wattage rating needed to place in series and set the correct current through the LEDs. So instead, I used series diodes. Each diode added would drop the Voltage to the LEDs and lower the current. I picked the number of series diodes based on the measured current. I knew that the original supply was specified to provide 700mA of constant current. So, I added and removed series diodes until I had a constant current close to 700mA. Reassembled the outdoor light with the new parts and it works great. No flickering, just a nice constant light output and the repair cost me 1/3 the cost of using an original replacement.

Worked great. Had 1 - 1 watt led light to power. Works as it should.

Very compact power supply, ideal for small projects using 12V relays and other devices such as small motors or LED lights. For example, I added a strobe light in front of my home, that I turn ON when my garage door is open so alert pedestrians or electrical scooter on the sidewalk indicating that a car is going to enter or to exit from the garage.

We are installing LED strip lights in our basement. This allows us to connect to a light switch. This product is easy to use. Props to this company, my fist package was empty, looks like it was cut / torn and maybe the product fell out. They replaced it. I will buy agin from them.

I had a faulty transformer for an LED entry light, and this matched the output. It was packaged in a pair, I only needed 1, but now I have a spare, I guess!Works great, runs a little warm. It’s in an outside light, but it’s protected under an overhang and will never get wet unless my house is under water (and I’ll have bigger problems than the entry light going out). On a up note, if my house DOES go under water and this transformer blows, remember I have a spare!

I actually used this on a special project. The cooling fan on my welder died. I have several fans from salvaging some things and while the OEM fan was 120V ac, all of my salvaged fans are dc, and the ones that were same size as the OEM fan were 12V dc. Although this product is pretty much an led driver, it’s worked like a champ for my special project. It’s small enough to hide inside the case. It’s got a cooling fan right on it so no worries about overheating. So far, it’s done exactly what I needed it to do and I don’t have any complaints, which is rare for me.

Installed 2 ft of 12V LED strips in my printer. Got 25 hours of on-time with the first power supply. Autopsy revealed that the primary filter capacitor failed. Some signs of overheating of the primary control chip, but its hard to say if it wasn't due to capacitor leakage. The unit is potted in silicone for dust/moisture resistance, so a live bench test wasn't possible.Using the second one from the box now, but shopping for a better one, as this one uses crappy components.

Power Supply has a small footprint. All leads were pre-tinned. DC side leads are red and black. AC side are both white. I’m running three strips of led lights along with a PIR-8 motion sensor. LEDs light quickly and bright upon opening the safe door. Nice product.