I found this interesting device while browsing over the http://www.electronickits.com web site:
http://www.electronickits.com/kit/complete/ligh/vemk160.htm I was looking for a way to turn a portable repeater on/off remotely when I was out of the RF coverage area. This scheme uses a cellphone with a simple photo cell to detect when the screen lights up during ringing. For about 20 bucks and a cheap prepay phone I can control the repeater from anywhere I have cell phone coverage. Interesting........................ 73, Joe, K1ike
