I'm developing a project that concerns the detection of Human presence inside a room.
For this I am using an Arduino with a SE-10 PIR Motion Sensor http://www.sparkfun.com/products/8630
Although the easy way to put all the stuff working,the results obtained are not the expected.
For example this morning I made a test, where I put the PIR sensor inside a box, to not detect any kind of motion.
Unexpectedly the results were the following:
In 1275 iterations, it had detected motion for 140 times, what represents in the end an error % of 10%!!!
To let you know I am using an open collector scheme with a pullup resistor of 10kohms (http://bildr.org/2011/06/pir_arduino/
), that sends the values to an arduino (supplies the sensor with 5V).
Because I am thinking to use both sensors in my master thesis project, this problem is really worrying.
Thus can somebody help me?