WolfwhoopPW-D Control Buck Converter 6-24V to 5V 1.5A Step-Down Regulator Module Power Inverter Volt Stabilizer

I bought these to rig up a cable to run my Rove 4K dash cam from my rear-view mirror. 12V power source. The Rove specifies 5V at 1.5A which is at the limit of these units per the description. The wires are so small on these things that it was quite tedious to build up the cable and solder everything together and protect everything with heat shrink tubing. I was quite proud of my work. I double checked that it worked by attaching to a 12V power supply and measuring the output. It did output 5V. However, when trying to run the dash cam, no luck. Turns out that some cams need to have the USB interface (via IC circuit) properly installed otherwise they will shut down. I replaced this with the guts from a cigarette lighter adapter and all worked fine. Saving these for another project.

I only have used 1 so far but it worked fine. I used it to power a DMX lighting wireless receiver from a 12V battery since it needed 5V. They are quite small.

Based on a test of a single unit, some practical specs:1) Input voltage requirement: stable 5V with 9V input, no problems seen up to 30V. I tested at 100mA. This covers the range of 12V and 24V lead-acid batteries as found in autos and trucks (11V - to 29V). After doing this I tested at 14.4V for a 12V automobile battery.2) Efficiency seemed to always be about 86%, so if you have a load of 1W the converter will be dissipating 0.16W and at 5W (which is a 1A draw at 5V) the converter ends up having to dispose of about 0.8W. My measurement system wasn't that accurate; input wattage is based on the readouts of a fairly cheap bench power supply.3) Output voltage was stable over the current range I tested at 14.4V - 100mA to about 2A - HOWEVER above 1A the regulator was running above 80C.I measured temperatures using a restricted air-flow and a type K thermocouple clamped to the unit inside a paper towel rapping; i.e. this is very crude.I got 50C at 500mA output (the USB maximum). This ramped up to around 80C at 1A and 90C at 1.2A. These temperatures seemed moderately stable - I left the system running for a few minutes each time. I tried to get up to 2A without waiting for stabilization of the temperature but at some point the regulator stopped producing output. It did recover, I do not know if there is some internal temperature protection or if this was just good luck.I assume the 3A guarantee is the instantaneous maximum at which the regulator still produces 5V output, this would be consistent with what I saw. So far as I am concerned anything above 500mA continuous/average requires attention to cooling.The construction of the unit uses something which appears to be epoxy potting compound on the supply and output wires. This may be intended to provide moisture protection (along with the heat shrink wrap) but it also makes it next to impossible to unsolder the small gauge wires used. There does not seem to be any heat sink compound within the shrink wrap.Overall I rate these regulators very high; one star dropped because someone might actually try to use one for 3A continuous and because there is no continuous current rating in the advert. I would guess from what I observed that this is 500mA, corresponding to the USB figure that most 5V devices conform to.I intend to use one of these in an 8-900mA application because they are so conveniently small and I will know what happened and how to fix it if the converter fails after a few months.

I blew the 5v regulator on my Eachine Trashcan after switching to a XT30 battery connector (and not adding a capacitor, because I didn't know I needed to). There are youtube videos about this, and repair options.To install, I cut the connectors off this voltage converter and soldered the leads on to the F4 controller. (The source voltage side to where the battery connector comes in, and the 5v side to where the LED strip is soldered on.) Works great so far, with about 20 flights. There does not seem to be enough space for this device directly on top of the F4 board (below the VTx), so I put it on top of the VTx board, between the antenna and the back of the camera. The long leads on this converter help with that placement. It's very light weight (maybe a couple tenths of a gram). Trashcan is flying great again.

This allowed me to take an old 24v alarm system power supply already wired into my home and step it down to 5v so that I could power a Ring Alarm keypad and keep it perpetually charged.My next plan is to do the same thing to power an old tablet to use as a home automation display.

Nice item , fast shipping

There is no way that this holds 1.5A steady, the wiring alone would melt.Absolute garbage description, I will keep them for some electronics project but not for the 1A project I needed them for.Do not get them if you need to power anything more than a fraction of an A.

Bought these to use one as a charging source for a device that uses USB to charge its internal battery. I was concerned about the voltage regulation as the charging current changed. NO problem. With 12v in, the output was 5.10v unloaded, 5.08v at 150mA, and 5.04v at 1.0A. Running at 1A the unit temperature rose 40 degrees C over ambient. Running at 150mA load the device was 75% efficient. With no load, the unit drew 0.2mA on the input. All four of mine tested fine. BTW, the larger red input connector will accept Dupont connectors (with a bit of coercion). My USB device is very happy with the 5v from these. I'm happy, too.