Hey guys, I'd like to make use of an old head unit for in dash controls (volume, stations, etc.) so I was looking to use a Phidget interface kit. Now, it's got 5V outputs, but how can I use that to power the 12V power antenna? I don't really know how relays work, but is there such a thing as a relay that is controlled by 5V but uses 12V output? If not what would I need to do? Convert the 5V to 12V and just use a regular 12V relay?
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Question for the experts regarding relays