I've got this motion sensor circuit all put together and connected to my old laptop turned digital picture frame and it's working very well. http://forum.allaboutcircuits.com/showthread.php?t=28653 Only problem now is that the motion trigger stays on for about a second and every once in a while it stays on long enough to turn off the computer.
I'm wondering if anyone knows of a simple/low space way to make the relay trigger for 1 second only if the motion sensor is triggered twice in say 5 seconds. I thought about using a flip-flop, but I'm not sure how to set these up to achieve this. Maybe a J-K flip-flop with one input attached to a 555 timer with a heavy duty cycle?
I guess the other option would be something like a PIC, but I'd really like something that would use a little less space than either of these options.
Anyone have any ideas here? Thanks.
I'm wondering if anyone knows of a simple/low space way to make the relay trigger for 1 second only if the motion sensor is triggered twice in say 5 seconds. I thought about using a flip-flop, but I'm not sure how to set these up to achieve this. Maybe a J-K flip-flop with one input attached to a 555 timer with a heavy duty cycle?
I guess the other option would be something like a PIC, but I'd really like something that would use a little less space than either of these options.
Anyone have any ideas here? Thanks.