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30W 2A DC 1.8V -15V PWM Motor Speed Controller Regulator Low Voltage Fan Speed Control Switch PWM Adjustable Drive 5V 12V
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Mini DC-DC Boost Step Up Converter 3V 3.2V 3.3V 3.7V 5V 9V to 12V Voltage Regulator PCB Board Module can set 5V/ 8V/ 9V
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TPA3110 XH-A232 30W+30W 2.0 Channel Digital Stereo Audio Power Amplifier Board DC 8-26V 3A