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HW-140 DC-DC Buck Boost Converter Step Up/Down, LCD display, 3A 5.5V-30V for 0.5V-30V compatible with Arduino
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DC-DC USB Input Converter Board Buck Boost Voltage Regulator Module – Sun Cheong Computer Company Limited
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Amazon.com: Buck Boost Converter, Icstation DC 3.5V-28V to 1.25V-26V Step Up Down Module 3A Voltage Regulator 3V 5V 6V 9V 12V 24V : Electronics
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