Amazon.com: 2Pcs AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module Delinx : Electronics
800W 30A DC Buck Converter Step-down Power Supply Module IN 20-70V OUT 2.5-58V | eBay
LM2596 2A Buck Step-Down Power Converter Module DC 4-40 to 1.3-37V LED Voltemeter at Rs 320/piece | Interface Modules in Coimbatore | ID: 9135782497