Thanks. Appreciate the reply. From a brief look that might detect 2.4ghz too?

Really wish I was clever enough to do electronics!

Depends on the length of the antenna. I'd bet you can get a length close enough to be a quarter-wave 5Ghz and 1/2-wave 2.4ghz antenna. Just buy a 2.4/5Ghz combo antenna and slap the diodes across it.

I love simple solution like this. It'd be cool just wandering around being able to detect mobile and stuff with a tiny led.

This sort of thing is definitely why I come the HN.

Just curious, what does your username stand for? :D

Nothing. obviously the last bit stands for hacker news. Just randomly pressed letters.

Okay, I was just curious because you were saying nice things about HN and there's a popular abbreviation IFL for I Fucking Love, so I had to wonder!

Oh, I didn't know that and searching for ifh abbreviation on urban dictionary brings back what I think your curious about. Unfortunate coincidence. All my usernames are random strings. Good to know though.