- Sun May 17, 2009 10:24 am
#72929
Take the Arduino out of the picture for the moment. Connect a 10k resistor between the black (alarm) and red (VCC) pins of the PIR module. Then take a voltmeter and connect the negative lead to the brown (GND) lead of the module and the positive lead to the black (alarm) pin. Connect +5 to the red pin and GND to the brown pin. Watch the meter as you move about. The sensor should detect your movement and the voltage output should change.
Ralph