i am trying to install usb ports in my dash to be used as power supply for multiple devices.** going to tap into remote power supply for radio (12v) want to avoid lighter adapters.* i'm pretty sure i need to reduce voltage to 5v and amps to 1A. i am a beginner with this type of project, and would like to know how to reduce the voltage and amps...dont want to wreck devices. thanks in advance
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