I was referred to Arduino by a friend on another forum and I want to see if you all think my project is possible.
I'm trying to detect whether or not a person passes though a hallway (or doorway) in a specific window of time (to be read from the computer's internal clock... or ?) and if not trigger an alarm. There will be two 20-minute windows of time each night and the environment may be well lit, dimly lit with a night light, or dark. That's a quick summary of the idea.
Other things I would like to implement:
1) A disable/resume button for people to pass through and avoid false positives (10 minute window? maybe, maybe not...)
2) Have the computer call the house it's being used at for the alarm
On my list so far:
1) Arduino Uno
2) Motion Sensor: http://www.sparkfun.com/products/8630
- reports of it not working well on 5V? What about use in low light?
I found a cellular shield here but it puts me over-budget: http://www.sparkfun.com/products/9607
Is there a way Arduino could make Skype calls or interface with a modified $20 pay-as-u-go phone?
Thanks in advance,