UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output : ID 1385 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
DC-DC Buck Converter, 12V/24V to 5V | ATO.com
DC/DC Power Converter 12V DC Input to 5V DC Output at 1 Amp Wire to USB - NCD Store
Dc-dc Isolated Converter Power Supply Module 5w Dc Dc 12v To 15v/5v/12v 24v To 5v/12v Hlk-5d2405/5d1205/5d1212/5d1215/5d2412 - Integrated Circuits - AliExpress
Amazon.com: 12V to 5V DC Converter Car Power Voltage, Waterproof DC 6.3-22V 12V Step Down to DC 5V 3A 15W Voltage Regulator Buck Converter Power Supply Step-Down Module Compatible with Vehicle Car
Mini Buck 12V to 5V DC-DC converter – ElectroMage Shop
Amazon.com: EPBOWPT DC 12V 24V to DC 5V 10A, 5V 5A, 5V 3A, 12V 5A, 10A Power Converter Power Adapter (12/24V to 5V 10A Converter) : Electronics
DC-DC Converter DC8-78V to 5V/12V Adjustable Step-down Power Supply Module QS-7812CBD-2A | QSKJ