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300W DC To DC Step Down Buck Converter 5 To 40V To 1.2 To 35V Adjustable Power Module with Short Circuit Protection

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3Pcs XL6009 DC-DC Buck Boost Voltage Converter Power Module 4A 400KHz Adjustable Switch Module 3.8-30V To 1.25-35V Power Supply

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1PCS MP1584EN DC-DC Step Down Power Supply Module 3A Adjustable Buck Converter, Ultra-Small Size for Arduino Replace LM2596