Project: tulip
Project Tulip
An autonomous, low-power time-lapse photography system
Overview
Project Tulip is an experimental hardware and software project focused on developing a compact, battery-powered time-lapse camera capable of operating independently for extended periods.
The objective is to create a reusable device that can be deployed in a location, automatically capture high-quality photographs at configurable intervals, and reliably preserve those images for later retrieval.
Unlike conventional time-lapse solutions that depend on continuous power, network connectivity, or frequent maintenance, Tulip is designed around autonomy, energy efficiency, and reliability.
The ultimate goal is a device that can be deployed for a month or longer, operating continuously throughout the day and night without requiring human intervention.
Primary Objectives
1. Autonomous Operation
Tulip should function as a completely self-contained system.
Once configured and activated, the device should independently manage its capture schedule, camera operation, image storage, and power consumption.
- Operate without Wi-Fi or internet connectivity.
- Capture images at configurable intervals, ranging from seconds to days.
- Maintain accurate timekeeping across sleep cycles.
- Recover gracefully from unexpected failures.
- Require minimal interaction after deployment.
2. Extended Battery Life
Power efficiency is a fundamental design objective, not an afterthought.
The system should minimize energy consumption between image captures to maximize the duration of unattended deployments.
- Use deep sleep between scheduled captures.
- Physically remove power from energy-intensive peripherals when not in use.
- Minimize active processing and peripheral startup time.
- Measure and optimize actual power consumption.
- Target deployments lasting at least 30 days on battery power.
3. High-Quality Photography
Tulip should prioritize image quality while balancing capture performance, storage requirements, and power consumption.
- Capture full-resolution 5-megapixel (2592 × 1944) photographs.
- Support autofocus.
- Preserve images as high-quality JPEG files.
- Produce consistently usable photographs under varying lighting conditions.
- Avoid unnecessary reductions in resolution or image quality to improve performance.
4. Reliable Local Storage
All photographs should be stored locally on removable microSD media.
- Support high-capacity microSD cards, initially targeting 256 GB.
- Preserve captured images across power cycles and system restarts.
- Associate accurate timestamps with captured photographs.
- Minimize the risk of corrupted or missing images.
- Ensure stored photographs can be retrieved without specialized software or network access.
5. Reliability and Environmental Flexibility
Tulip should be designed for repeated deployments across different environments.
Initial development will focus on indoor operation, with eventual support for outdoor deployments in above-freezing temperatures.
- Operate unattended for extended periods.
- Survive repeated sleep, wake, and peripheral power cycles.
- Recover from transient hardware and storage failures where possible.
- Accommodate a protective enclosure for outdoor use.
- Remain reusable, portable, and relatively easy to deploy.
Engineering Philosophy
Project Tulip is as much an exercise in embedded systems engineering as it is a photography project.
Development follows several guiding principles:
Incremental Development
Build and validate individual capabilities before introducing additional complexity. Each development stage should establish a reliable foundation for the next.
Measure Before Optimizing
Use actual measurements of power consumption, capture duration, storage performance, and reliability to guide engineering decisions.
Hardware Continuity
Prefer a design in which components used during development remain part of the finished device. Avoid disposable prototypes, unnecessary component replacements, and hardware modifications that introduce avoidable risk.
Reliability Over Complexity
Favor predictable, maintainable solutions over clever optimizations that compromise stability.
Separation of Concerns
Organize software around clear responsibilities such as scheduling, image capture, storage, power management, and system recovery.
Extensibility
Preserve the ability to introduce new capabilities without requiring a complete redesign of the hardware or software.
Initial Hardware Platform
The initial implementation is based on the following components:
| Component | Purpose |
|---|---|
| Adafruit Feather ESP32 V2 | Primary microcontroller |
| Arducam Mega 5MP Autofocus (B040101) | Image capture |
| Adafruit MiniBoost TPS61023 (#4654) | Switched peripheral power |
| Adafruit TLV62569 3.3V Buck (#4711) | Regulated microSD power |
| Adafruit microSD Breakout (#4682) | Removable image storage |
| 6600 mAh Li-ion battery | Portable power source |
| 256 GB microSD card | Local photograph storage |
The architecture is intended to allow the ESP32 to remain in a low-power state between captures while the camera and storage peripherals are physically powered down.
Hardware compatibility, power behavior, and performance must be experimentally verified rather than assumed.
Development Roadmap
Development is divided into independently verifiable stages.
| Stage | Objective |
|---|---|
| A — Core Functionality | Validate camera communication, autofocus, full-resolution photography, microSD storage, shared SPI operation, and peripheral power cycling |
| B — Timekeeping | Introduce accurate real-time clock synchronization and image timestamps |
| C — Power Management | Implement deep sleep and reliable peripheral power isolation |
| D — Battery Optimization | Measure energy consumption and model achievable deployment duration |
| E — Reliability | Perform extended testing, fault recovery validation, and burn-in |
| F — Assembly | Transition from development wiring to a durable, reusable physical assembly |
| G — Enclosure | Develop a protective enclosure suitable for intended deployment environments |
| H — Field Testing | Validate performance in realistic operating conditions |
| I — Extended Deployment | Demonstrate reliable unattended operation for at least 30 days |
Progression between stages should be based on demonstrated functionality rather than assumed readiness.
The initial hardware validation stage, for example, must demonstrate at least 100 consecutive successful image captures, reliable SD writes, peripheral power cycling, and measured capture timing and image sizes before advancing.
Future Possibilities
Although the initial implementation is intentionally offline and self-contained, the architecture should remain open to future enhancements, including:
- Wireless configuration and image retrieval.
- Remote monitoring and status reporting.
- Cloud storage synchronization.
- Over-the-air firmware updates.
- Solar-assisted power.
- Intelligent capture scheduling.
- Alternative camera modules and higher-resolution photography.
These features are potential extensions rather than requirements for the initial project.
Definition of Success
Project Tulip will be considered successful when a completed device can be configured, placed in an appropriate environment, and left to operate autonomously for at least 30 days.
Throughout its deployment, the device should reliably wake at scheduled intervals, capture full-resolution photographs, preserve those images with accurate timestamps, and return to a low-power state without requiring external power, network connectivity, or human intervention.
The result should be a practical, reusable tool for documenting changes over time, built upon a well-understood and extensible embedded systems architecture.