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

DC DC 9A 300W Step Down Buck Converter 5-40V To 1.2-35V Power Module For Arduino–OKY3497-4 – OKYSTAR

DC DC Step Up Buck Converter, Lm2596 Power Module 4-35V to 1.25- 25V Continuously Adjustable, Power Converters : Electronics

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 Step Down Buck Converter Converter 12V to 35V Adjustable Regulator Module 10V-32V to 12V-35V at Rs 200/piece, Buck Converter in Thane

LM2596 DC-DC Step Down CC CV Power Supply Module 7V-35V To 1.25V-30V 3A Adjustable Voltage Regulator Converter LED Driver - AliExpress

DC Step Down Buck Converter Converter 12V to 35V Adjustable Regulator Module 10V-32V to 12V-35V at Rs 200/piece, Buck Converter in Thane

LM2596 DC-DC Step Down CC CV Power Supply Module 7V-35V To 1.25V-30V 3A Adjustable Voltage Regulator Converter LED Driver - AliExpress

Step-Up/Step-Down Buck Voltage Regulator 5V 400mA S10V4F5 - Kamami on-line store

DC-DC Adjustable Step-up & Step-down Converter

DC DC Step Up Buck Converter, Lm2596 Power Module 4-35V to 1.25- 25V Continuously Adjustable, Power Converters : Electronics