mbeals 74 Posted October 18, 2012 Share Posted October 18, 2012 I would like to set up a proximity detector with a range of around 5'. All I want is a simple trigger....high for someone is there, and low if there isn't. Looking online, I've found I can do it actively with an illumination diode and an IR receiver, or I can do it passively with a PIR detector. It seems like the active sensor is the simplest, but I'm concerned that I won't get the 5' of range and that the signal will be really noisy and prone to a lot of false alarms. However, it also seems like the PIR detectors are more geared towards motion sensing, and I need to monitor a persistent presence. I would also rather deal with a binary type output than having to process a PWM signal. Anyone have experience or recommendations? For what it's worth, I'm attempting to build a bi-directional detector that can detect when a person is to the left, right or directly in front of the sensor. Quote Link to post Share on other sites
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