DROK DC Buck Module, Adjustable Buck Converter Step Down Voltage Regulator 6V-32V 30V 24V 12V to 1.5-32V 5V 5A LCD Power Supply Volt Reducer Transformer Module Board with USB Port Protective Case

Nos ha funcionado muy bien

It is very good Thanks

Works with the Pi4 for me using the right 12v input, its just a shame the USB cant be automatily on after a power cycle,

I bought one of these to step down 24V to 12V for cooling fans on my 3D printer. So far, this little buck converter has been virtually flawless. It's easy to connect wiring, adjusting the voltage was a snap, and it looks pretty great, to boot!Pros:• Easy connections with screw-down clamp terminals• Easy to adjust outgoing voltage• Display can be adjusted to show incoming voltage, outgoing voltage, or both. And even amperage.• Looks fantastic. I love the clear, open "housing".• Includes small stick-on heatsink to keep things running coolly.• Everything fit together perfectly• Has a USB power output, in case you need to run USB devices from other power sources. (Likely need to reduce output to 5V.) This output can also be disabled.• Even has a spot to mount a small cooling fan to the clear acrylic over the heatsink.Cons:• No assembly instructions, though it's not overly complicated. (Hint: Look at the product photo for help.)• Voltage is off slightly, so I wouldn't call it overly-precise. Display says 12.0V out, and I measured 11.67V out. Good enough for my purposes.• Open housing can let in dust and debris, if that's a concern.• Included double-sided adhesive really doesn't stick all that well.Overall, the cons are pretty minimal for me. I'm really happy with this thing. We'll see how it does with longevity, but for right now it's been working great.

取説が英文かなと思っていたら正確な日本語で良かった。ただ、書面は梱包でシワだらけだった。キャリブレーションがきちんと説明されていて解りやすかった。冷却フィンはモジュールから飛び出ないぐらいの大きさが欲しかった。3A以下での使用だが結構熱くなる。冷却ファンの取付け穴はあるが、ファンについての案内は無かった。DC18～20Vを12～14Vで使用している。