View Single Post
 
Old 04-22-2012, 01:33 AM
xee2 xee2 is offline
Silver Member
 
Join Date: Jan 2010
Posts: 580
Quote:
Originally Posted by jake View Post
What powers the wireless AV plug?
The AV plug appears to not have a return, but it actually does. The return path is through capacitive coupling. There is always some amount of capacitive coupling between any two conductors. Touching one side of the LED will increase the capacitance since that allows the high frequency current to flow over the surface of your body and increases the area of the capacitive plate. Normally this requires higher voltage than you have in order to work wirelessly so I am surprised that you can get it to work without a return wire with the voltage you have. The circuit is just a diode rectifier feeding an LED. The diodes prevent the reverse voltage across the LED from getting high enough to burn it out (LEDs can only have about 10 volts of reverse voltage before they will be destroyed).

see >>> one wire circuit - YouTube
__________________
 
Reply With Quote