The Carrot Box
An automated possum feeder triggered by real-time CNN detection
The Concept
Once the camera system reliably detects a possum in the backyard, the next step is to do something useful with that signal. The idea is simple: a small weatherproof box placed in the yard that automatically opens its lid to reveal a carrot when a possum is detected.
By offering a food reward in a predictable location, the possum is drawn away from areas near the house and dog door — reducing the chance of a wildlife-pet encounter. The box stays closed during the day and only activates at night when the detection system is running.
This turns the detection pipeline from a passive monitoring tool into an active wildlife management system, combining computer vision with simple physical automation.
How It Works
01
Possum Detected
The CNN detection system confirms a possum is present via the temporal sliding window rule (3 out of 5 frames).
02
Signal Sent
The detection script sends a trigger signal over the local network to a microcontroller (e.g. Arduino or Raspberry Pi) connected to the box.
03
Lid Opens
A servo motor rotates the lid open, revealing the carrot inside the weatherproof enclosure.
04
Timer Reset
After a set period with no further detections, the lid closes automatically and the system resets for the next visit.
Design Considerations
Weatherproofing
The enclosure needs to withstand rain, humidity, and temperature swings while keeping the carrot fresh and the electronics dry.
Power Source
Options include a mains power extension, rechargeable battery pack, or a small solar panel for fully off-grid operation.
Servo Reliability
The servo motor must handle repeated open/close cycles nightly, ideally with a locking mechanism so curious animals can't force the lid.
Carrot Freshness
The box should be easy to open manually for daily carrot replacement, and the compartment should stay ventilated when closed.
Current Status
This prototype is currently in the early concept and design phase. The detection pipeline is functional and provides a reliable trigger signal — the next step is building and testing the physical box.
The initial plan is to use an Arduino Nano with a standard servo motor, housed in a modified weatherproof container. A 3D-printed lid mechanism is being explored to ensure smooth and repeatable operation.