It occurred to me last night that perhaps i could use the card reader itself to determine when the wheel has stopped moving. For example- when the wheel turns each segment passes the reader and it will read a cards ID in sequence...Card A, B, C, D..etc. Once the wheel goes back around the cycle repeats. i cannot tell how many times the cycle would repeat because each spin would be random. That said, once the wheel stops the reader will keep reading the same card over and over (that's a problem too, but lets solve one at a time), but what if I set a timer and say 'if card A has been read continuously for 3 seconds (wheel has stopped), play a video. any thoughts?