Weight or movement switch

Thread Starter

spacecadet

Joined Jul 24, 2020
3
Hey guys,

I have a bird grain + water feeder combo which hangs from the roof. I live on the seventh floor, and pigeons are the only pests I encounter. They weigh significantly more than sparrows/parrots and cause the feeder to swing violently causing the water to empty out in a few minutes.

I was thinking of creating a weight or movement based switch to cover the feeder when pigeons try to sit on. I have a physics degree but after being in the IT business for couple of decades, I have no clue where to start :(

If you guys could point me to something similar or any other advice, I would be grateful.

Thanks
ART
 

OBW0549

Joined Mar 2, 2015
3,566
Several possibilities:
  • A load cell placed in the hanging structure can be used to sense a change of weight
  • An accelerometer can be used to sense movement
  • A tilt switch can also be used to sense movement
Googling on any of these terms will bring up tons of information. Adafruit.com has a generous assortment of all three types of sensor; they're well worth checking out.
 

AlbertHall

Joined Jun 4, 2014
11,404
Does it hang on a string, chain, or hook and loop?
By the time a sensor is triggered the pigeon has already landed.
Could you surround the feeder with a bigger cylinder with holes suitable for the birds that you want?
 

Thread Starter

spacecadet

Joined Jul 24, 2020
3
Hey,
I have attached a picture. I have two of these hanging side by side.
Each have two openings for the grains. The openings are small and I could rig up a plastic trapdoor to shut them both. So even if the sensor triggers after the pigeon has landed, its ok. The pigeons will lose interest after a few days of not reaching the grains.

Thanks
ART
 

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Thread Starter

spacecadet

Joined Jul 24, 2020
3
Several possibilities:
  • A load cell placed in the hanging structure can be used to sense a change of weight
  • An accelerometer can be used to sense movement
  • A tilt switch can also be used to sense movement
Googling on any of these terms will bring up tons of information. Adafruit.com has a generous assortment of all three types of sensor; they're well worth checking out.
Thank you very much, I will investigate load cell and adafruit.com
 

jpanhalt

Joined Jan 18, 2008
11,088
Peregrine falcons love pigeons. That's how one place I worked handled the problem of pigeon poop. Unfortunately, if there aren't enough pigeons, they also go after smaller birds.
 
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