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Portable wireless motion sensor triggered alarm with a wireless doorbell and an airwick motion sensor

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Picture of Portable wireless motion sensor triggered alarm with a wireless doorbell and an airwick motion sensor
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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
 
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Step 1: Digitized sensor input

Picture of 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

Picture of 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

Picture of 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.

 
LangBardr2 years ago
So this will be my first real attempt at this. Is there any way that you could give the name and model of the wireless doorbell that you used? Perhaps you can provide better pictures now more clearly showing where things are connected on the transmitter?
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