DC DC 9A 300W Step Down Buck Converter 5-40V To 1.2-35V Power Module For Arduino–OKY3497-4 – OKYSTAR
300W XL4016 DC-DC Max 9A Step Down Buck Converter 5-40V To 1.2-35V Adjustable Power Supply Module LED Driver | Buy at Best Price in Bangladesh | KaziExpress
Adjustable Voltage Regulator DC, DROK 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
D-Sun 3A Step Down Switching Voltage Regulator / 3A DC-DC Step Down BUCK Converter Board - WIT Computers