PIR Motion Sensor (JST)
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.
- Red wire is power (5 to 12V).
- Brown wire is GND.
- Black wire is open collector Alarm.
- This unit works great from 5 to 12V (datasheet shows 12V).