Introduction: Portable Wireless Motion Sensor Triggered Alarm With a Wireless Doorbell and an Airwick Motion Sensor

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About: Electronics geek, Openwrt, Linux, hardware hacker, maker, SF fan.

I had the idea to combine these two items for some time now, so when a local store got the wireless doorbell for about 11,50USD I just had to buy it....

Parts and tools needed:
Soldering station
Screwdriver
Something to cut the pcb
Wires
1x tip31 transistor
1x Airwick motion sensor
1x Wireless doorbell

Step 1: Digitized Sensor Input

http://www.instructables.com/id/Re-purposing-an-Air-Wick-Freshmatic-Compact-i-Moti/step4/Aproach-1B-Digitized-Sensor-Output-Small-Module/

Tnx Doug Paradis, this step gave me some trouble.
I only changed a part of his method, I just used some solder and no drilling.

Step 2: The Idea


EDIT: I recommend  you add a power switch between the center tip31pin  and the negative  circuit contact, the circuit loves to eat batteries!

The tip31 can be replaced with 2n3055 :)

Step 3: The Finished Project

I was in a hurry, and had no idea for the transmitter housing so i put it all in the airwick housing. I hope to hear your ideas and adjustments.