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DC 12V Automatic shutdown Temperature Speed Controller 4 wire Mini Fan PWM Speed governor Regulator Switch
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I've been salvaging these disposable vapes for the 3.7v 500mAh lithium batteries inside. They can be used to power small electronic projects with the appropriate charging circuit and voltage converter. : r/diyelectronics
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Dc 5v 12v Pwm Fan Temperature Control Speed Motor Controller Governor Regulator For Pc Computer Cpu Fan Cooler Alarm Module - Motor Driver - AliExpress
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