This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the 'alarm' pin will go low.
The older versions have a brown wire instead of the new white wire. In the old version: Red wire is power (5 to 12V). Brown wire is GND. Black wire is open collector Alarm.
The new version wires: Red wire is power, White wire is GND and the Black wire is open collector alarm.
This unit works from 5 to 12V (for best results use 6.7 to 12V as the PIR can be unstable below 6.7V). You can also install a jumper wire past the 5V regulator on board to make this unit work at 3.3V. Sensor uses 1.6mA@3.3V.
The alarm pin is an open collector meaning you will need a pull up resistor on the alarm pin. The open drain setup allows multiple motion sensors to be connected on a single input pin. If any of the motion sensors go off, the input pin will be pulled low.
The connector is slightly odd but has a 0.1" pitch female connector making it compatible with jumper wires and 0.1" male headers.
Excl. VAT: £2.29 Incl. VAT: £2.748
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