[Pirated content]

... I have sent them an email demanding they take down my stuff. ...

Where can I find your stuff?

[555 timer designs using relay as output switch]

if i use the attached circuit, where can i put the capacitor for the delay of the relay to deactivate after power input is removed.. thanks

I think Hero999 meant across the power input supply, i.e. from +12V to ground.

[Need some interesting usage of electronics in agriculture]

... Does anyone knows some of the amazing applications of electronics in agriculture?
I'll be grateful if anyone could help me find some. Of course I need some technical (or detailed) information about those applications. ...

If you Google "soil moisture sensor nslu2" you'll find a project I made for my garden. The system has been dismantled because I moved to a new property, but I'm about to reinstall it again and do some temperature compensation to get a more precise reading. I'm using Debian, OWFS and rrdtool to create some nice looking graphs.