Computer with eyes and ears.

 Microphone. I recommend buying one at radio market. You’ll hear even whisper. And you can find camera with microphone. I soldered the microphone from an old Swiss phone, it works great.
 Software. The only program that I could find and that is up to quality is WebCamMonitor. I recommend you to install eMule, it’s better to find version 3.47 (9Mb).
And you’ll need wires of needed length. I used 20-meter length network cable. You'll also need video cord with RCA jacks and microphone connector.
Few days of work, soldering iron other instruments and it’s done.
First you’ll need to test the work of our cam. Follow the attached instruction and solder the cords and video cord with RCA jack to it. Check the polarity three times, and then turn on the power and RCA jack into TV video output.

 
  After successful test increase the cords’ length to needed then again check the system. You need imbedded wire for audio-video signal transmitting. But the common wires don’t make much trouble. Just a microphone started to buzz, but that’s not a great problem. (I wired mounting staples to the camera with insulating tape; I was lazy to put them away).