WWZMDiB Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function

No hace nada. El voltaje simplemente pasa. Los potenciómetros para ajustar el voltaje de salida no hacen nada, e incluso el interruptor que está etiquetado como ON/OFF no hace nada

Works great. A proprietary battery for a device I have died, so I used this attached to a big 12v DC battery to simulate the exact voltage and amperage that the broken battery provided and it works perfectly. Very good value for money.

Not working

First one sent to me was erratic and the adjusters did not work. After a few minutes of adjusting it started smoking. Requested a replacement and the replacement works! Feels like a score when you can get questionable to poor electronic quality from you know what country. I'm happy for the price. Expect duds if u can tolerate the hassle of exchanges.

It worked fine.