DROK Adjustable Voltage Regulator DC, Buck Boost Converter 6.0V-36V 9v 12v to DC 0.6-36V 24v 5A Power Supply Panel, Constant Current Volt Step Up Down Module

I used this in a customized portable power supply pack I built. I placed it on top of a battery adapter for a Dewalt battery (18 to 20 volts), and the adapter also has USB outputs too. This little power supply can supply voltages from an input voltage range DC 6.0-36V, with an output voltage range DC 0.6-36V, max output current 5A, max output power 80W. The unit allows you to set the volts and limit the current, power on off (NOT a master power on off, just the output voltage on off) and an accurate voltage setting return after power down. It has memory locations for presetting the voltages at those locations. So you can quickly pull up a voltage setting from memory. I used a switch on the side of my project to turn on and off the master power to the device, so I could still keep it on the battery without discharging the battery by having the display on. The black box was purchased from another source, though the contacts didn't work very well for the battery connections and thus I needed to adapt it to another adapter itself. All in all, a very handy device to use for testing various circuits by using a simple battery pack that can supply a multitude of voltages and set currents too. Input or output voltage, current, temperature, power, electric capacity, electric quantity, running time, voltage and current curve, system and power parameters. Very nifty.

This is such a simple-to-use perfect device for building your own variable power supply! Just grab an old power 'brick' (because I know you have some) ... and put it into an enclosure with some binding posts, and there you have it! The 'power brick' makes it electrically safe for your country, (because if you have one - it's already certified for your country) and the DC output is 'dial-in' adjustable. How cool is that?!?!

Llego a tiempo y en perfectas condiciones lo estoy instalando y tiene muy buena calidad el servicio excelente

First, the value for the money is exceptional. Twenty-something bucks for a power supply that can boost/drop voltage to anywhere from less than a volt to over 30 volts it so cheap that I am fine with buying extras and just leaving them in my projects rather than bothering with building custom voltage/current regulation hardware to swap out for it when I'm done prototyping. There is an active cooling fan for when loads demand it, but I've yet to drive it hard enough to trigger it and if you don't want to use their little fan, you can unplug it and take responsibility for the job of keeping the chip cool. The enclosing plastic frame doesn't seem to be too inefficient about leaving empty space inside to make the case a useful shape, and it sufficiently protects the hardware against my careless slinging of conductors near it, as well as the occasional drop onto hardwood floors. The screw-down terminals for connecting source and output wires are excellent. They are physically secure and won't wiggle against their solder just because you are tightening the screws securely plus they accept nice, large-gauge wire (I'm pretty sure all the wires I have in there are a 12 gauge or thicker). They are all right in a row, though, so be sure you tin the ends and cut them to have no exposed wire visible outside the terminals or a stray strand of wire could short something. Speaking of safety, you can manually adjust the live current/voltage settings in use (with a delay) but switching modes automatically turns off the output to protect against accidental frying of hardware. It might be annoying, but without it on my previous voltage converter, I burned up a whole LED array by accident. However, the user interface is barely acceptable, with numerous quirks: Current limiting is always on, but the "CC" (constant current) indicator only signals when the current drawn exceeds the setting and the power supply is holding it down to the set value. Setting values is done digit by digit with the knob, but sometimes the largest digit is only set by adjusting the second largest by enough to carry over. Many settings are unexplained and most require good acronym guesswork to decode. The memory can have 9 saved presets, but only the 1 and 2 numbered presets are able to be quickly recalled with the power button. Making changes is a process that usually forces me to cycle through setting digits at least twice before the value is what I want, and changing the live voltage or current limits has a two second delay before being applied, making the process of zeroing in on an optimal voltage by trial and error much slower than necessary and leaves accidentally-too-high voltages pumping through your hardware for two seconds (more than enough time to damage LEDs with even moderate excess voltages. Overall, the quirks I am happy to put up with in exchange for the many strengths and excellent price for this very useful module.

I also purchased a Ryobi battery adapter to create a portable adjustable power supply with this. Used it on a couple small motors and it worked well. I like some of the extra data feedback provided by the device.