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Convert Belkin FM Transmitter from Battery Power to Car Power

Step 6Test everything!

You should have a complete circuit now, just a little bit sprawled out. Go ahead and try it in the car now to make sure everything works before you go through the trouble of stuffing it into that tiny package.

Test the voltage at every point (12v before regulator, 3v after regulator) and go ahead and try it in your car. Everything should work fine so all you have to do is make it look pretty.
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Author:darc
Just a geek with a soldering iron...