I am very new to this but...
My truck doesn't have a cigarette lighter and while I am considering wiring one in to power my mp3 player and cell phone, I thought it would be cool to do a direct 12v dc to 5v USB port. Obviously from reading this post, it is much more complicated than I had anticipated.
My question is this, is there any reason I couldn't cut the cigarette lighter plug off of one of these http://www.amazon.com/Multi-Use-Vehi.../dp/B000PB8CQI
and wire it in directly?
If that is true, why can't any cigarette lighter to USB charger converter be hacked and spliced into a dashboard for 5v usb power?
Thanks and please forgive my ignorance,