Looking for a 12v source only when the car is in motion.
Hey MacGyver, here's an interesting one: I just looked at your webpage and, based on your resume, you and I were in UF's engineering program at the same time. I was in the combined Electrical/Computer Engineering program, graduated Dec. 99. Small world, eh?
Kenny, I'm not sure what you would have the IR look at. You could use one of the chips they put in optical mice that look for pattern changes, but it would have to have a clear view of the road straight down. A mercury/pendulum switch wouldn't work, either...once you get up to speed (i.e., no acceleration), the switch turns off.
jeff, small world! I doubt we would have seen each other in any classes, though, with me graduating 2.5 years ahead of you...maybe in the halls scoping out all 8 or 10 women in the combined EE/CSE dept.
jeff, small world! I doubt we would have seen each other in any classes, though, with me graduating 2.5 years ahead of you...maybe in the halls scoping out all 8 or 10 women in the combined EE/CSE dept.
If you mean one of those IR motion sensors used in security systems, you could probably make it work. You'd have to adapt it to the 12volts for the car, unless they already make them. The detector would probably falsely detect motion during rain/windstorms or passing traffic depending on sensitivity.
You could use a motion sensor for a car alarm, but you would still need a delay. You could add a relay with a built in delay. This would probably falsely detect motion if the radio was booming or if you move around in the car depending on sensitivity.
Both of those options are brute force and would cost more than Modifry/MacGyvers suggestions.
You could use a motion sensor for a car alarm, but you would still need a delay. You could add a relay with a built in delay. This would probably falsely detect motion if the radio was booming or if you move around in the car depending on sensitivity.
Both of those options are brute force and would cost more than Modifry/MacGyvers suggestions.
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