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ZK-4KX ZK-5KX DCDC Buck Boost Converter CC CV 0.5-30V 4A 5V 6V 12V 24V Power Module Adjustable Regulated laboratory power supply

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3A Mini DC-DC Buck Step Down Converter Board Module 5V-30V to 3.3V 5V 12V DC DC Voltage Regulator PCB Board Power Buck Module

3Pcs MT3608 Module DC-DC Converter Boost Module Power Board 2A 2V-24V for 5/9/12/28V Arduino Upgrade Modify Expand DIY

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