Step 5The Camera, Microphone and speaker
The circumference of the lens is 2cm. For you non geeks (all three of you) that's 3 1/2" long by just a little bit less than 1 3/16 in. wide.
I used a car mic for the microphone and a waterproof speaker mounted above the door. Note: the camera has its own microphone, but it is set back a few inches, and I did not want to tear the mic out to extend it.
I also used a Telex Audio to USB converter (GriffenTech makes one as well). This way I can take all my video and audio via USB back to the Mac Mini computer in my server room, funneling it away from the front door.
Oh another great product USB Extender over CAT5E or CAT6 Connection up to 150ft:
http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10303&cs_id=1030313&p_id=6042&seq=1&format=2
I may upgrade to this, if the video is choppy:
http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10303&cs_id=1030312&p_id=7644&seq=1&format=2
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