force

hey peepz, I am doing a security systems project, where there is a motion sensor , a siren and a webcam.When the motion is sensed the siren goes on and the webcam captures the image and stores it on the computer. All these are done now i need an external RAM to store atleast one frame from the webcam. The external RAM is to be interfaced to a laptop. Could any people tell me on how to interface a webcam to an external RAM. The RAM is used to store one frame from the webcam when the motion is sensed by the motion detector. force