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UCTRONICS DC 6V 9V 12V 24V to DC 5V 5A Buck Converter Module, 9-36V Step Down to USB 5V Transformer Dual Output Voltage Regulator Board [2 Pack]
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12v to 5v Converter, SolarSynthesis Waterproof USB Charging Adapter Voltage Regulator DC DC Converter 12/24V to 5/9/12V 4.2A Power Supply Transformer Step-Down Module QC 3.0 for Vehicle Phone Charger
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Power Supply - 12V/5V (2A) - TOL-15664 - SparkFun Electronics
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