DC-DC converter module Step Up / Step Down 4-35V - adjustable 1.25-25V - Kamami on-line store

DC-DC Adjustable Step-Down Module 4-38V to 1.25-36V COM52 ,R22 - Faranux Electronics

DC-DC Automatic Buck-Boost Power Module from ICStation on Tindie

DC-DC converter module Step-down 3-40V - adjustable 1.5-35V LM2596 - Kamami on-line store

KOOBOOK 2Pcs DC-DC Step Up Down Boost Buck Voltage Converter Module Regulator LM2596 LM2577 4-35V to 1.25-25V : Electronics

KOOBOOK 2Pcs DC-DC Step Up Down Boost Buck Voltage Converter Module Regulator LM2596 LM2577 4-35V to 1.25-25V : Electronics

DC-DC converter module Step Up / Step Down 4-35V - adjustable 1.25-25V - Kamami on-line store

DC-DC Step-Down Buck Module

DC-DC Step-Up Buck Converter, Lm2596 Power Module 4-35V to 1.25-25V Continuously Adjustable : : Business, Industry & Science

5-25V Voltage display DC-DC Adjustable Step up/down Power Supply Module boost and buck converter LM2596&LM2577 [ 4pcs/lot] - AliExpress

KOOBOOK 2Pcs DC-DC Step Up Down Boost Buck Voltage Converter Module Regulator LM2596 LM2577 4-35V to 1.25-25V : Electronics

DC-DC Converter 10-32V to 35-60V 120W Step up Boost Adjustable Voltage Charger Power Supply Module - RC GEAR BD

DC-DC converter module Step Up / Step Down 4-35V - adjustable 1.25-25V - Kamami on-line store

KOOBOOK 2Pcs DC-DC Step Up Down Boost Buck Voltage Converter Module Regulator LM2596 LM2577 4-35V to 1.25-25V : Electronics