Adding an auxiliary sensor: Triggertrap Motion


If you've been reading the blog very very regularly, you'll have spotted that back in December, I wrote about a Christmas present Noah and Michael (the guys who have been helping me develop and design the Triggertrap v1 and Triggertrap Shield) gave me the Triggertrap Motion.

Now, Triggertrap Motion was part Christmas present (It even had a cute little hanging tab so it could be hung from the Christmas tree!), and part proof-of-concept, showing that by adding your own sensors, you can expand the Triggertrap to do nearly anything you want to.

In this case, the Triggertrap Motion turns the Triggertrap into a burglary-alarm style motion detector, taking photos when it senses movement. Cool, eh?

Where can I buy one?

We aren't currently planning to make the Triggertrap Motion available for sale -But we might, if there's enough interest (are you interested? Leave a comment!)

How can I make one?

It isn't particularly hard to build your own: Use a PIR sensor (that's Passive Infra-Red sensor. For the TT Motion, we used a D203S Pyroelectric Infrared Sensor), and adapt the electronics so its output falls within the parameters the Triggertrap expects - see the Auxiliary Mode section in our user manual for more specifications and information...

Once you've got it all wired up, you hook it up to the Triggertrap via the Aux port, and you use the settings menu in the Triggertrap's Auxiliary mode to choose how you want to take your photos:

  • Threshold: Choose a triggering threshold based on the readings you're getting from your PIR sensor
  • Triggering Type: Chose "on Rise" to trigger the camera whenever movement starts. Choose "on Fall" to trigger the camera whenever movement stops. Choose "On Change" to trigger the camera whenever movement stops and starts.
  • Delay: Add a delay if you want there to be a delay between detecting movement and triggering the camera.

I've just been playing with the Triggertrap Motion PIR sensor connected to my Triggertrap v1 prototype, and it works like a dream. Best of all, by using a passive sensor, you don't need to use a laser beam to sense motion - it does it all itself! Bloody awesome stuff.

And finally...

A quick timelapse (created with the Triggertrap v1 prototype, with a 2-second interval) of the assembly of the TT Motion:

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