Close encounters of the garden kind.

It’s that time again to start feeding the hedgehogs ready for their winter sleep, and to put out my IR Raspicam with IR LEDs and passive IR motion detector.

Slugs

Slugs

Rat

Rat

Bovril, one of our cats

Bovril, one of our cats

Sadly, no hedgehogs yet.

This is pretty much the same as I used last year with two minor changes:

  • I’m using brighter LEDs in a better range of the IR spectrum (840nm)
  • The LEDs are now only turned on for 10s for each photo – previously they were lit all night.

Who’s been eating my porridge?

We’ve been leaving some cat biscuits in our garage for a homeless cat that’s adopted up.

And at the same time, the separate hedgehog food bowl in the garden was no longer visited.

And here’s why, as provided by the PIR motion detector + RaspiCam NoIR:

Ginge, our adoptee

Ginge, our adoptee

One of the 'hogs

One of the ‘hogs

86 photos were taken last night; the camera takes shots once a minute once movement is detected; we definitely has 3 clear visits from the stray cat, and regular hedgehog visits over the course of 6 hours suggesting more than one hog is feeding here.

I need to install the brighter IR LEDs that I bought to get better pictures.  Once we’re back from Devon perhaps as long as Phoebe is behaving well enough for the CamJam.

Hedgehog Pi Recipe

Ingredients:

Hedgehog breakfast

Hedgehog breakfast

Here’s the finished build:

HogCam

HogCam

Over the course of last night, 58 shots were taken when motion was detected.  After each shot, there’s a delay of 1 minute to prevent too many shots being taken.

I’m in the process of getting the code on GitHub – I’ll update the post when it’s there.
The code is now on GitHub.

Next step is to take video for say 1 minute for each motion detected.