Slow Invertebrate Release Feeder — Reptile Enrichment

Slow Invertebrate Release Feeder — Reptile Enrichment

Project overview

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Three teammates adn I built a timed, randomized release feeder that returns natural hunting behavior to reptiles by releasing live crickets in randomized intervals over a user-selected duration (1–12 hours). The device holds ~150+ crickets live, and dispenses 6 independent groups at random times so reptiles must hunt rather than their current method of feeding from a single bowl at a predicted time.

The design emphasizes keeper usability (removable rechargeable battery and an accessible lid), animal safety (ventilated lid and gentle trap-door mechanism), low cost (target < $100 BOM), and durability for long-term exhibit use. Key components include an Arduino controller, potentiometer timing control, relays and solenoids driving trap doors, and a modular partitioned hopper for easy cleaning.

Project demo

How it works

The user selects a total run duration with a potentiometer (1–12 hours) and toggles the device on. Arduino firmware chooses 6 random timestamps within that period and triggers solenoids, each of which retracts to drop a trap door and release a small group of live crickets.

Design highlights

Partitioned hopper holds >150 crickets and is removable for cleaning.
Ventilated lid preserves cricket viability while keeping electronics protected.
Timing randomness mimics natural prey availability and encourages natural hunting.

Keeper workflow

Fill hopper and close lid, slide potentiometer to desired duration, flip power on — device runs autonomously and is designed for weekly recharging and simple maintenance.

Features

Partitioned hopper and lid

Partitioned Hopper & Lid

Removable lid with mesh for airflow; partitions for containment and easy cleaning.

Random timing concept

Randomized Release Timing

Arduino selects 6 random times across the chosen duration to trigger drops.

Solenoid and trap door

Solenoids & Trap Doors

6 solenoids retract to release individual trap doors that drop groups of insects.

Electronics box

Electronics & Power

Arduino controller with relays, removable rechargeable battery, accessible electronics box.

Testing and safety

Testing & Animal Safety

Temperature, drop height, durability, and keeper usability testing completed.

Capacity and maintenance

Capacity & Maintenance

Holds 150+ crickets; modular parts for easy cleaning and serviceability.

Full images & CAD

Top view

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