I have found out how to use a NE200B PIR IC chip to detect heat given off by a Human body, hands or face.
This stops the problem with objects having to move to be detected, as the output is currently balanced between the outputs of both sensors.
If however you cover up one of the sensors with a piece of tape, you can have an output depending on one sensor, as it compares to nothing on the other sensor.
A tape over half of the sensor window opposite Pin 1 works a treat.
Then the Arduino can be used to sense a hand from 9 inches to 3 feet away with a little extra circuitry.
Your setup will also detect sun shining through a window on the wall or a radiator during the heating period. Usually not a PIR sensor's intended use case.
Google "Grid-eye sensor".
Leo..
Seems over complicated and considerably more expensive than the sensor I describe.
Also the datasheet is not clear on how you use a 64 array of sensors, three digital outputs and has a 14 pin SMD design.
Pylon,
This expands the range of things you can detect then!
It is a narrow range device, and it is what it was intended for Infra-Red detection !
Have you got a link to data sheet, google doesn’t know what that is
RE200B datasheet
enjoy!
A grid-eye sensor is basically the same as the 2-element sensor used in PIR sensors.
Sparkfun has a grid-eye on a breakout board, with Arduino library.
Leo..
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.