This is my first post, and although I have found some threads related to my project, I am new enough to electronics to find myself stuck in the particulars of what I am trying to do.
I am trying to design a timed circuit that uses a PIR motion sensor to trigger a moving object for about 1 minute. After it times out, it is at rest until motion is detected again. I replicated the circuit as posted on the parallax forum here (first attachment in the post):
http://forums.parallax.com/forums/default.aspx?f=21&m=370512
This part is just a matter of putting it on the breadboard, and it works fine. My problem is that the PIR needs to be on the moving object; since the PIR needs to adjust for a period of time (about a minute), I figure that I need a second timer that starts as soon as the first one times out. This timer can run for about a minute or so (the PIR adjustment period), and then when it times out, it allows the PIR--if it senses movement--to start the motion in the first timer again.
My guess is to interrupt the signal from the PIR to the first timer input somehow? (It obviously does not work to interrupt the power to the PIR, which only defeats the purpose of the adjustment period.) Can anyone help with the best way to do this?
I am trying to design a timed circuit that uses a PIR motion sensor to trigger a moving object for about 1 minute. After it times out, it is at rest until motion is detected again. I replicated the circuit as posted on the parallax forum here (first attachment in the post):
http://forums.parallax.com/forums/default.aspx?f=21&m=370512
This part is just a matter of putting it on the breadboard, and it works fine. My problem is that the PIR needs to be on the moving object; since the PIR needs to adjust for a period of time (about a minute), I figure that I need a second timer that starts as soon as the first one times out. This timer can run for about a minute or so (the PIR adjustment period), and then when it times out, it allows the PIR--if it senses movement--to start the motion in the first timer again.
My guess is to interrupt the signal from the PIR to the first timer input somehow? (It obviously does not work to interrupt the power to the PIR, which only defeats the purpose of the adjustment period.) Can anyone help with the best way to do this?