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USB With Current Micro USB 5V to 3.3V 9V 12V 18V 24V Adjustable LED Display Buck-Boost Power Supply Voltage Regulator Module - RC GEAR BD
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USB to 3.3V / 5V TTL Auto sensing adapter
AMS1117 3.3V 5V/3.3V DC Mini USB Power Supply Module
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Serial USB Converter (5V/3.3V selectable) - SWITCH-SCIENCE
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FTDI USB to TTL Serial Adapter - 3.3V and 5V – HobbyPCB
