Need help with field effect circuit

Sylithan

Feb 4, 2016
5
Joined
Feb 4, 2016
Messages
5
Accidently posted in this in the wrong section so I'm posting it here now.

I'm trying to build an antenna that powers an LED. I want the LED to stay off when the antenna detects no electric field. And turn on when it does detect one. I know the basics but in really confused when it comes down to the exact type of FET transitory I need. And do I need a FET or JFET. What's the difference and how would each of these work in this type of project? Thanks for any help.
 
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